WO2015000292A1 - 一种不间断电源电路 - Google Patents

一种不间断电源电路 Download PDF

Info

Publication number
WO2015000292A1
WO2015000292A1 PCT/CN2014/070449 CN2014070449W WO2015000292A1 WO 2015000292 A1 WO2015000292 A1 WO 2015000292A1 CN 2014070449 W CN2014070449 W CN 2014070449W WO 2015000292 A1 WO2015000292 A1 WO 2015000292A1
Authority
WO
WIPO (PCT)
Prior art keywords
bidirectional
bidirectional converter
type
switch
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/070449
Other languages
English (en)
French (fr)
Inventor
崔兆雪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP14790477.5A priority Critical patent/EP2846436B1/en
Priority to US14/533,439 priority patent/US9520718B2/en
Publication of WO2015000292A1 publication Critical patent/WO2015000292A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/10—Current-controlled supply systems, e.g. constant-current supply systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J4/00—Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks
    • H02J4/20—Networks integrating separated AC and DC power sections
    • H02J4/25—Networks integrating separated AC and DC power sections for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
    • H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
    • H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/487—Neutral point clamped inverters

Definitions

  • the present invention relates to the field of uninterruptible power supplies, and more particularly to an uninterruptible power supply circuit. Background technique
  • UPS Uninterruptible Power System
  • the role of the UPS is to provide power to the load instead of the mains when the mains supply is stopped.
  • the UPS contains energy storage devices. When the mains is abnormal or interrupted. Next, the UPS continues to supply power to the load by means of inverter conversion by the energy in the energy storage device, so that the load maintains normal operation.
  • the UPS includes the following parts: rectifier, inverter, charging circuit and discharging circuit, energy storage device, an existing UPS circuit, which uses the rectifier as a discharge circuit of the energy storage device, but still needs a charging circuit, circuit structure Complex; another existing UPS circuit, the mains and energy storage devices use two independent conversion circuits (rectifiers or inverters), wherein the charging circuit and the discharging circuit of the energy storage device share a set of high-power battery conversion Circuits, such UPS circuits require high-power battery conversion circuits, resulting in a complicated structure of the UPS circuit, and high cost of the high-power battery conversion circuit.
  • the structure of the existing UPS circuit is complicated.
  • an embodiment of the present invention provides an uninterruptible power supply circuit and a control method thereof to reduce the circuit structure complexity of the UPS circuit.
  • the technical solution is as follows:
  • the present application provides an uninterruptible power supply circuit, including: a bidirectional selection switch, a first type bidirectional converter, a second type bidirectional converter, an energy storage device, a filtering device, and a controller;
  • the first end is connected to the AC end of the first type of bidirectional converter, the second end is alternatively connected to the AC power source or the energy storage device, and the control end is connected to the first output end of the controller;
  • a DC terminal of the converter is connected to the filtering device, and a control terminal is connected to the second output terminal of the controller, and an operating state of the first type of bidirectional converter includes rectification, inversion, boosting or stepping down;
  • the DC terminal of the second type bidirectional converter is connected to the filtering device, the AC terminal is connected to the load, the control terminal is connected to the third output terminal set of the controller, and the working state of the second type bidirectional converter includes the inverter. Or rectification;
  • the controller is configured to output a control signal that controls the bidirectional selection switch to be connected to the energy storage device when the energy storage device needs to be charged, and output control to control the first type of bidirectional converter to be in a buck state And a control signal for controlling the second type of bidirectional converter to be in a rectified state; and outputting a control signal for controlling the bidirectional selection switch to be coupled to the energy storage device when the energy storage device is discharged, And outputting a control signal for controlling the first type of bidirectional converter to be in a boost state, and outputting a control signal for controlling the second type of bidirectional converter to be in an inverted state.
  • the bidirectional selection switch is a relay or a bidirectional thyristor.
  • the bidirectional selection switch is a single pole double throw relay, and the first moving end of the single pole double throw relay is connected to the
  • the AC power source has a second moving end connected to the energy storage device, and a fixed end connected to the AC end of the first type of bidirectional converter, and two ends of the coil are connected to the controller.
  • the bidirectional selection switch includes a first type of bidirectional selection switch and a second type of bidirectional selection switch; The first end of the bidirectional selection switch is connected to the alternating current power source, the second end is connected to the alternating current end of the first type of bidirectional converter, and the control end is connected to the controller;
  • the first end of the second type of bidirectional selector switch is connected to the energy storage device, the second end is connected to the AC end of the first type of bidirectional converter, and the control end is connected to the controller.
  • the first type of bidirectional selection switch and the second type of bidirectional selection switch are single throw relays, a first normally open contact of the single throw relay is a first end of the bidirectional select switch, and a second normally open contact of the single throw relay is a second end of the bidirectional select switch, the single throw relay Both ends of the coil are connected to the controller as the control terminal of the bidirectional selection switch.
  • the first type of bidirectional selection switch and the second type of bidirectional selection switch are both a bidirectional thyristor, a first end of the bidirectional thyristor is a first end of the bidirectional selection switch, a second end of the bidirectional thyristor is a second end of the bidirectional selection switch, and a gate of the bidirectional thyristor is extremely controlled by the bidirectional selection switch Connect the controller to the end.
  • the first type of bidirectional selection switch includes a first bidirectional selection switch, a second bidirectional selection switch, and a third bidirectional selection switch; and the second type bidirectional selection switch includes a fourth bidirectional selection switch a fifth bidirectional selection switch and a sixth bidirectional selection switch;
  • the first bidirectional converter comprises a first bidirectional converter, a second bidirectional converter and a third bidirectional converter;
  • the converter includes a fourth bidirectional converter, a fifth bidirectional converter and a sixth bidirectional converter; a first end of the first bidirectional selection switch is connected to an alternating current end of the first bidirectional converter, and a second end is connected to the The phase A of the three-phase alternating current power supply, and the control end is connected to the controller;
  • the first end of the second bidirectional selection switch is connected to the AC end of the second bidirectional converter, the second end is connected to the B phase of the three-phase AC power source, and the control end is connected to the controller;
  • the first end of the third bidirectional selection switch is connected to the AC end of the third bidirectional converter, the second end is connected to the C phase of the three-phase AC power source, and the control end is connected to the controller;
  • the first end of the fourth bidirectional selection switch is connected to the AC end of the first bidirectional converter, the second end is connected to the energy storage device, and the control end is connected to the controller;
  • the first end of the fifth bidirectional selection switch is connected to the AC end of the second bidirectional converter, the second end is connected to the energy storage device, and the control end is connected to the controller;
  • the first end of the sixth bidirectional selection switch is connected to the AC end of the third bidirectional converter, the second end is connected to the energy storage device, and the control end is connected to the controller;
  • the DC terminals of the first bidirectional converter, the second bidirectional converter and the third bidirectional converter are all connected to the filtering device;
  • the DC terminals of the fourth bidirectional converter, the fifth bidirectional converter and the sixth bidirectional converter are connected to the filtering device, and the AC terminals are connected to the load;
  • the controller is configured to separately control states of the bidirectional selection switch, the first type bidirectional converter and the second type bidirectional converter connected to the AC circuits of the A phase, the B phase, and the C phase, to be separately controlled
  • the operating modes of the A-phase AC circuit, the B-phase AC circuit, and the C-phase AC circuit, the operating modes include an AC power supply mode, an energy storage device power supply mode, and an energy storage device charging mode.
  • the first type of bidirectional converter is a half bridge full control a bidirectional converter
  • the half bridge full control bidirectional converter includes: a first switch tube, a second switch tube; a common connection between the first end of the first switch tube and the second end of the second switch tube End, as the AC terminal of the first type of bidirectional converter;
  • the second end of the first switch tube and the first end of the second switch tube both serve as DC terminals of the first type of bidirectional converter
  • the control ends of the first switching transistor and the second switching transistor serve as control ends of the first type of bidirectional converter.
  • the first type of bidirectional converter is an I type bidirectional converter
  • the I type three-level bidirectional converter comprises a first switching tube, a second switching tube, and a first a three-switching tube, a fourth switching tube, a first diode and a second diode;
  • a first end of the first switch tube is connected to a second end of the second switch tube, and a first end of the second switch tube is connected to a second end of the third switch tube, the third switch tube
  • the first end of the first switch is connected to the second end of the fourth switch, and the second end of the first switch and the first end of the fourth switch are used as the DC end of the first type of bidirectional converter.
  • the common ends of the second switch tube and the third switch tube serve as AC terminals of the first type of bidirectional converter, and the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube
  • the control terminals are connected to the controller;
  • An anode of the first diode is connected to a cathode of the second diode and connected to a neutral terminal of the filtering device, a cathode of the first diode is connected to the first switching transistor and the a common end of the second switch tube; an anode of the second diode is connected to a common end of the third switch tube and the fourth switch tube.
  • the first type of bidirectional converter is a T-type bidirectional converter
  • the T-type bidirectional converter comprises: a first switch tube, a second switch tube, and a third switch Tube and Fourth switch tube;
  • a first end of the first switch tube is connected to a second end of the second switch tube, and a common end of the first switch tube and the second switch tube is used as an AC end of the first type of bidirectional converter a second end of the first switch tube and a first end of the second switch tube as a DC terminal of the first type of bidirectional converter;
  • the second end of the third switch tube is connected to the first end of the fourth switch tube, and the first end of the third switch tube is connected to the common end of the first switch tube and the second switch tube.
  • the second end of the fourth switch tube is connected to the neutral end of the filtering device;
  • the control ends of the first switch tube, the second switch tube, the third switch tube and the fourth switch tube are all connected to the controller.
  • the first switch tube, the second switch tube, and the third The switch tube or the fourth switch tube is an insulated gate bipolar transistor or a metal-oxide-semiconductor-field effect transistor; the insulated gate bipolar transistor has a first end of the emission, a collector is the second end, and the gate is controlled
  • the metal-oxide-semiconductor-FET has a source having a first end, a drain being a second end, and a gate being a control terminal.
  • the filtering device includes a first capacitor and a second capacitor, and a cathode of the first capacitor is connected to a cathode of the second capacitor, and is connected to an AC neutral terminal.
  • the anode of the first capacitor and the cathode of the second capacitor are connected as both ends of the filtering device to connect the first type of bidirectional converter and the second type of bidirectional converter.
  • the uninterruptible power supply circuit provided by the invention comprises a bidirectional selection switch, a first type bidirectional converter, a second type bidirectional converter, an energy storage device and a filtering device, and the first end of the bidirectional selection switch is connected to the first type bidirectional converter At the AC end, the second end is alternatively connected to an AC power source or an energy storage device, wherein the first type of bidirectional converter has the functions of rectification, inverter, boost, and step-down.
  • the first type of bidirectional converter acts as a charger for the energy storage device.
  • the uninterruptible power supply circuit provided by the present application does not need to additionally provide a charger or a high-power battery conversion circuit, thereby simplifying the circuit structure of the uninterruptible power supply circuit.
  • FIG. 1 is a schematic diagram of a circuit principle of a single-phase UPS circuit provided by the present invention
  • FIG. 2 is a schematic diagram of a circuit principle of a three-phase UPS circuit according to the present invention.
  • FIG. 3 is a schematic diagram of the working principle of the circuit shown in FIG. 2 in an AC power supply mode
  • Figure 4a is a schematic illustration of the operation of the circuit of Figure 2 in a partially phased, residual phase charging mode
  • Figure 4b is a schematic diagram showing another working principle of the circuit of Figure 2 in a partial phase power supply and a residual phase charging mode;
  • FIG. 5 is a schematic diagram showing the working principle of the circuit of FIG. 2 in the charging/discharging mode of the energy storage device;
  • FIG. 6 is a partial schematic structural diagram of a three-phase UPS circuit according to an embodiment of the present invention;
  • FIG. 7 is a partial schematic structural diagram of another three-phase UPS circuit according to an embodiment of the present invention;
  • FIG. 8 is a partial structural diagram of another three-phase UPS circuit according to an embodiment of the present invention.
  • the UPS circuit includes a bidirectional selection switch 1, a first bidirectional converter 2, a filtering device 3, a second bidirectional converter 4, and an energy storage device 5.
  • the bidirectional selection switch 1 can be a single pole double throw relay, two relays or Two bidirectional thyristors are implemented. One end of the two-way selector switch 1 is connected to the AC terminal of the first bidirectional converter 2, and the other end is alternatively connected to the AC power source 6 and the energy storage device 5.
  • the bidirectional selection switch shown in FIG. 1 is realized by a single throw double knife switch.
  • the movable end is connected to the AC end of the first bidirectional converter 2, the first fixed end is connected to the AC power source 6, the second fixed end is connected to the energy storage device, and the control end is connected to the first output end of the controller, and passes through the controller (Fig.
  • the output control signal controls the action of the mobile terminal, thereby enabling the AC power source 6 or the energy storage device 5 to be connected to the UPS circuit.
  • the AC power supply may be a single-phase AC power supply, a two-phase AC power supply, or a three-phase AC power supply.
  • the two-phase AC power supply may be an independent two-phase AC power supply or a two-phase AC power supply of a three-phase AC power supply. Another phase of abnormal state.
  • the DC end of the first bidirectional converter 2 is connected to both ends of the filtering device 3, and the control end is connected to the second output terminal set of the controller, and the working state of the first bidirectional converter is controlled by the control signal outputted by the controller.
  • the The first bidirectional converter has four operating states: rectification, inverter, boost, and buck.
  • the DC terminal of the second bidirectional converter 4 is connected to both ends of the filtering device 3, the AC terminal is connected to the load 7, the control terminal is connected to the third output terminal of the controller, and the control signal output by the controller controls the operation of the second bidirectional converter.
  • the second bidirectional converter 4 has two operating states of rectification and inverter.
  • the filtering device 3 is realized by a capacitor, and the main function is to filter out the interference signal, and also has the function of short-term energy storage. When the AC power source and the energy storage device are switched, there is a short interruption time in the middle, and at this time, the filter device is used as a load for a short time. powered by.
  • the AC power output from the AC power source is rectified by the first bidirectional converter, and a DC voltage +bus voltage and a -bus voltage are generated at both ends of the filter device 3, and the +bus voltage and the -bus voltage pass through the second bidirectional After the inverter is inverted, AC power is supplied to the load 7.
  • the UPS circuit when the UPS circuit is connected to the load with energy backwashing characteristics, the load acts as an energy source, the AC grid side is a load, and the load side energy is rectified by the second bidirectional converter, and is generated at both ends of the filtering device 3 DC voltage +bus voltage and -bus voltage, +bus voltage and -bus voltage are inverted by the first bidirectional converter, and AC power is supplied to the AC grid, thereby realizing energy flow from the load side to the AC grid side, improving energy Utilization rate.
  • the power is supplied by the energy storage device, and the DC power output from the energy storage device is boosted by the first bidirectional converter, and the DC voltage +bus voltage and the -bus voltage are obtained at both ends of the filtering device 3, +bus After the voltage and -bus voltage are inverted by the second bidirectional converter, AC power is supplied to the load 7.
  • the busbars +BUS and -BUS at both ends of the energy storage device are used as energy sources, that is, the DC voltage +bus voltage and the -bus voltage are obtained at both ends of the filter device 3, and the +bus voltage and the -bus voltage pass through the first two-way.
  • the converter 2 performs the step-down, the battery is charged, and the charging power is increased with the existing one. Compared with the UPS circuit of the charger circuit, the charging power is higher, and the charging capability is equivalent to the main power of the AC power source.
  • the energy on the busbars +BUS and -BUS may be provided by the AC power source through the first bidirectional converter, or the second bidirectional converter may be obtained from the load, and the load at this time needs to have an energy backwashing characteristic, ie The energy can be reversed to the second bidirectional converter.
  • the switching process between the different operating states of the first bidirectional converter and the second bidirectional converter is controlled by the control signal output by the controller, by changing the switches in the first bidirectional converter and the second bidirectional converter.
  • the working state of the tube eventually changes the working state of the bidirectional converter.
  • the single-phase UPS circuit provided by the embodiment has the functions of two-way energy flow and two-way converter, and the AC power supply and the energy storage device are selectively connected to the same bidirectional converter through the bidirectional selection switch. Connected to connect the AC power supply or energy storage device to the bidirectional converter, the AC power supply and the energy storage device share a bidirectional converter, and no additional charger is needed, thereby reducing the circuit structure of the UPS circuit.
  • the three-phase UPS circuit includes three single-phase UPS circuits as shown in FIG. 1, specifically including: a first bidirectional selection switch 21, a second bidirectional selection switch 22, a third bidirectional selection switch 23, and a first bidirectional converter 24, The second bidirectional converter 25, the third bidirectional converter 26, the fourth bidirectional converter 27, the fifth bidirectional converter 28, the sixth bidirectional converter 29, the energy storage device 30, and the filtering device 210.
  • the first bidirectional selection switch 21, the second bidirectional selection switch 22, and the third bidirectional selection switch 23 can be specifically implemented by a single pole double throw type relay, or two independent relays, or two independent bidirectional thyristors, FIG. 2
  • the two-way selector switch utilizes a single-pole double-throw switch to illustrate the structural principle of a single-pole double-throw type relay, and the on-off state of the bidirectional selection switch can be controlled by a control signal outputted by the controller.
  • the first fixed end of the first bidirectional selector switch 21 is connected to the A phase of the AC power source (grid), the second fixed end is connected to the energy storage device 30, and the mobile terminal is connected to the AC terminal of the first bidirectional converter 24;
  • the first fixed end of the second bidirectional selection switch 22 is connected to the B phase of the AC power source, the second fixed end is connected to the energy storage device 30, and the movable end is connected to the AC end of the second bidirectional converter 25;
  • the first fixed end of the third bidirectional selector switch 23 is connected to the C phase of the AC power source, the second fixed end is connected to the energy storage device 30, and the movable end is connected to the AC terminal of the third bidirectional converter 26.
  • the DC terminals of the first bidirectional converter 24, the second bidirectional converter 25, the third bidirectional converter 26, the fourth bidirectional converter 27, the fifth bidirectional converter 28, and the sixth bidirectional converter 29 are all connected in parallel to the filtering device 210. Both ends.
  • the AC terminals of the fourth bidirectional converter 27, the fifth bidirectional converter 28, and the sixth bidirectional converter 29 are connected to the load 211.
  • the first bidirectional converter 24, the second bidirectional converter 25 and the third bidirectional converter 26 in this embodiment are first type bidirectional converters, and the bidirectional converters have rectification, inverter, boost, and step-down four.
  • the fourth bidirectional converter 27, the fifth bidirectional converter 28 and the sixth bidirectional converter 29 are second type bidirectional converters having two operating states of inverter and rectification.
  • the first type of bidirectional converter and the second type of bidirectional converter can be realized by a half bridge full control converter, a T type three level converter and an I type three level converter, and the first type of bidirectional converter inverter
  • the control mode of the rectification function is the same as that of the inverter and rectification functions of the second type of bidirectional converter.
  • the boosting and bucking functions of the first type of bidirectional converter control the on-time of the switching tube in the bidirectional converter by outputting pulse control signals of different duty ratios by the controller, and finally realize the step-up and step-down of the bidirectional converter.
  • the three-phase circuit adopts a bidirectional selection switch.
  • the AC power supply and the energy storage device are connected to the UPS circuit, and the three bidirectional selection switches on the three-phase circuit can be independently controlled to be closed and turned off, that is, the three phases of the A phase, the B phase, and the C phase can be independently controlled.
  • the working mode that is, the working modes of the three circuits of phase A, phase B and phase C can be arbitrarily combined.
  • the working mode includes: an AC power supply mode, an energy storage device power supply mode, and an AC power supply phase power supply, and the remaining phase is a mode in which the energy storage device is charged.
  • FIG. 3 the working principle diagram of the three-phase UPS circuit shown in FIG. 2 operating in the AC power supply mode is shown.
  • the bidirectional selection switch in each phase circuit is realized by two independent single-throw relays.
  • the A-phase circuit is connected to the A-phase AC power through the first relay 311, and is connected through the second relay 312.
  • the B phase circuit is connected to the B phase AC power source through the third relay 313, and the energy storage device 30 is connected through the fourth relay 314;
  • the C phase circuit is connected to the C phase AC power source through the fifth relay 315, and the sixth relay is passed through the sixth relay
  • the energy storage device 30 is connected.
  • the relay in the three-phase circuit is connected to the first-type bidirectional converter through the inductor L.
  • the inductor L is used for filtering and storing energy, and the inductor L is also included in the following drawings, which will not be described in detail below.
  • the first type of bidirectional converters in the three-phase circuits of A, B and C are realized by half-bridge full-control converters, that is, two switch tubes connected in series, and the specific switch tubes can be bidirectional such as IGBT and MOSFET. Semiconductor device.
  • the Phase A, Phase B, and Phase C of the AC power source are all in the AC power supply mode, and the controller controls the normally open of the first relay 311, the third relay 313, and the fifth relay 315.
  • the contacts are closed, that is, the A-phase, B-phase and C-phase circuits are all connected to the AC power supply.
  • the AC outputted from the A phase is input to the first bidirectional converter through the first relay, and after being rectified by the first bidirectional converter, the +bus voltage and the -bus voltage are obtained at both ends of the filtering device 210, and the bidirectional transformation is performed after the second stage.
  • the inverter is supplied to the load after being inverted;
  • the AC output of the B phase is input to the second bidirectional converter after passing through the third relay, and after being rectified by the second bidirectional converter, the +bus voltage and the -bus voltage are obtained at both ends of the filtering device 210, and the bidirectional transformation is performed after the second stage.
  • the inverter is supplied to the load after being inverted;
  • the AC power outputted by the C phase is input to the third bidirectional converter through the fifth relay, and after being rectified by the third bidirectional converter, the +bus voltage and the -bus voltage are obtained at both ends of the filtering device 210, and the bidirectional transformation is performed after the second stage.
  • the inverter is supplied to the load after being inverted.
  • the load connected to the UPS circuit has an energy backwashing characteristic
  • the load of the latter stage is rectified by the second type of bidirectional converter, and then sent to both ends of the filtering device, and then the energy is inverted by the first type of bidirectional converter. Return to AC power (grid), this process is the AC reflow process.
  • the three-phase UPS circuit shown in FIG. 2 is shown to operate on an AC power source. Part of the phase power supply, the remaining phase charging mode corresponds to the working principle diagram, the circuit structure of the three-phase UPS circuit in this figure is the same as the circuit structure shown in FIG. 3, and will not be described here.
  • the energy of the remaining phase can be transferred to the energy storage device channel to charge the energy storage device.
  • the two-phase AC power supply in the three-phase circuit of the AC power supply supplies power to the load, and the first type of bidirectional converter in the remaining one-phase AC circuit charges the energy storage device.
  • the A-phase AC power source and the B-phase AC power source in the three-phase circuit supply power to the load, and the first type of bidirectional converter in the C-phase circuit charges the energy storage device.
  • the controller controls The normally open contacts of the first relay 311, the third relay 313 and the sixth relay 316 are closed, that is, the AC power of the A phase and the B phase are turned on, the C phase circuit is connected to the energy storage device, and the circuit of the circuit of the second stage of the bidirectional selection switch is specific.
  • the working process is as follows:
  • the +BUS voltage and the -bus voltage are obtained on the +BUS bus and the -BUS bus connected to both ends of the filter device, and the after-stage is passed.
  • the bidirectional converter supplies power to the load after being inverted;
  • the +bus voltage and the -bus voltage are obtained on the +BUS bus and the -BUS bus, and the fifth bidirectional transformation is performed after the second stage.
  • the inverter supplies power to the load after inverting;
  • the sixth bidirectional converter in the C-phase circuit takes electrical energy from the busbars at both ends of the filtering device and reverses the voltage to supply power to the load.
  • the third bidirectional converter of the pre-stage obtains electric energy from the busbars at both ends of the filtering device, and then depressurizes and charges the energy storage device, that is, the third bidirectional converter of the pre-stage in the C-phase circuit charges the energy storage device,
  • the sixth bidirectional converter of the stage supplies power to the load.
  • Phase A AC and Phase B AC power the bus BUS, A, B, C
  • the three-phase circuit supplies power to the load at the same time.
  • the pre-stage circuit of the C phase charges the energy storage device, so the power of the load in the working mode cannot be too large.
  • any two-phase alternating current in the three-phase circuit supplies power to the load, and the remaining phase is charged by the energy storage device.
  • the specific example shown in FIG. 4a cannot cause limitation on the present application. .
  • One of the two phases of the three-phase AC circuit supplies power to the load, and the remaining two phases charge the energy storage device.
  • the A-phase circuit in the three-phase circuit supplies power to the load, and the B-phase and C-phase circuits charge the energy storage device.
  • the controller controls the first relay 311, the fourth relay 314, and the The normally open contact of the six relays 316 is closed, that is, the A-phase circuit is connected to the A-phase AC power supply, the B-phase and the C-phase are connected to the energy storage device, and the specific working process of the circuit of the second-stage selection switch is as follows:
  • the +bus voltage and the -bus voltage are obtained on the bus BUS at both ends of the filtering device, and the +bus voltage and the -bus voltage pass through the fourth bidirectional
  • the inverter is supplied to the load after being inverted;
  • the fifth bidirectional converter in the B-phase circuit takes power from the bus BUS and supplies power to the load after inverter.
  • the second bidirectional converter of the preceding stage takes power from the bus BUS to charge the energy storage device.
  • the sixth bidirectional converter in the C phase circuit takes power from the bus BUS and passes through the sixth bidirectional converter. After the inverter, the load is supplied with power; meanwhile, the third bidirectional converter of the preceding stage takes power from the bus BUS to charge the energy storage device.
  • the A-phase AC power is supplied to the bus BUS, and the A, B, and C three-phase circuits simultaneously supply power to the load.
  • the B-phase circuit and the C-phase circuit charge the energy storage device, so the load power in this working mode cannot be Too big.
  • any one of the three-phase circuits in the embodiment is powered by the load, and the remaining The remaining two phases can be charged for the energy storage device, and only a specific example shown in Figure 4b does not limit the application.
  • the three phase circuits of the three-phase UPS circuit in this embodiment can be in different working states.
  • part of the three phase circuits can be operated under the state of alternating current power supply, and the remaining phase Working in the state of charging the energy storage device, the waste of power input to the power grid is avoided, and the utilization rate of the input power grid is maximized.
  • FIG. 5 the working principle diagram of the three-phase UPS circuit shown in FIG. 2 operating in the charging/discharging mode of the energy storage device is shown.
  • A The discharge mode of the energy storage device. When the three-phase AC power supply is abnormal, the load is powered by the energy storage device to ensure that the load is normal.
  • the details can be divided into the following cases:
  • the controller controls the second relay, the fourth relay, and the sixth relay.
  • the normally open contact is closed, and the A phase, B phase and C phase three-phase circuits all connect the energy storage device into the circuit.
  • the electric energy outputted by the energy storage device is supplied to the first bidirectional converter, the second bidirectional converter, and the second type bidirectional selector switch (A, B, and C three phases respectively pass through the second relay, the fourth relay, and the sixth relay)
  • A, B, and C three phases respectively pass through the second relay, the fourth relay, and the sixth relay
  • the third bidirectional converter rectifies After the third bidirectional converter rectifies, a +bus voltage and a -bus voltage are generated at both ends of the filtering device, and the +bus voltage and the -bus voltage are performed by the fourth bidirectional converter, the fifth bidirectional converter, and the sixth bidirectional converter.
  • inverter After inverter, it is supplied to the load. 2
  • the circuit of the abnormal power supply phase operates in the discharge mode of the energy storage device, and the circuit of the normal power supply phase operates in the AC power supply mode;
  • the controller controls the normally-open contact of the second relay in the A-phase AC circuit to be closed, so that the energy storage device 30 supplies power to the load, and the specific power supply process and the above three
  • the power supply process of the energy storage device is similar when the AC power is in an abnormal state of power supply, and will not be described here.
  • phase of the phase circuit works in the state of AC power supply, and the remaining phase can charge the energy storage device.
  • the specific working process and the above three-phase UPS circuit work in part of the phase power supply.
  • the working process of the remaining phase charging mode is the same and will not be described here.
  • the three-phase first-stage bidirectional converter acts as a charger.
  • the second type of bidirectional converter in the three-phase circuit takes power from the load.
  • +bus voltage and -bus voltage are generated on the bus +BUS and -BUS, and the energy storage device is charged after being stepped down by the first type of bidirectional converter of the previous stage.
  • the three circuits of phase A, phase B, and phase C are all in a state of charge, and the charging power reaches a maximum value.
  • bidirectional selection switches of any of the above embodiments can be implemented by a single pole double throw type relay, two independent single throw relays, or two independent triacs.
  • FIG. 3 to FIG. 5 The schematic diagram of the bidirectional selection switch implemented by two independent single-throw relays is specifically shown in FIG. 3 to FIG. 5. Specifically, referring to FIG. 3, the first relay and the second relay connected by the A-phase circuit are taken as an example. It should be noted that the connection relationship of the relays of other phases is the same as the connection relationship of the relays of the A-phase circuit, and will not be described herein.
  • the first normally open contact of the first relay 311 is connected to the A phase AC power source
  • the second normally open contact is connected to the AC terminal of the first bidirectional converter
  • the coil is connected to the controller
  • the controller controls the power of the coil by controlling whether the coil is powered or not.
  • the normally open contact of the first relay is closed or opened, thereby controlling the type of power source that is connected to the Phase A circuit, the AC power source or the energy storage device.
  • the first normally open contact of the second relay 312 is coupled to the energy storage device, the second normally open contact is coupled to the AC terminal of the first two-way converter, and the coil is coupled to the controller.
  • FIG. 6 a partial structural diagram of another three-phase UPS circuit according to an embodiment of the present application is shown.
  • the bidirectional selection switch is implemented by a bidirectional thyristor, A, B, and C.
  • the phase circuit includes two bidirectional thyristors, wherein one bidirectional thyristor is connected to the alternating current power source, and the other bidirectional thyristor is connected to the energy storage device to selectively connect the alternating current power source and the energy storage device into the UPS circuit.
  • the phase circuit is described as an example.
  • the B-phase circuit and the C-phase circuit are the same as the A phase, and are not described here.
  • the first end of the first triac SCR1 is connected to the A-phase AC power source, the second end is connected to the AC end of the first bidirectional converter, the control end is connected to the controller, and the control signal outputted by the controller controls the conduction of the first bidirectional thyristor or Shut down.
  • the first end of the second triac SCR2 is connected to the B-phase AC power supply, the second end is connected to the AC end of the second bidirectional converter, and the control end is connected to the controller.
  • the bidirectional converter in this embodiment is specifically implemented by a half bridge full control converter.
  • the A-phase circuit is taken as an example for description, and the circuit structures of the two phases B and C are the same as those of the A phase.
  • the half bridge full control converter includes a first switch tube Q1 and a second switch tube Q2, which is Q1 in this embodiment.
  • Q2 is specifically a N-channel MOSFET (Metal-Oxide-Semi-Field-Effect Transistor), Q1 and Q2 are connected in series and then connected in parallel with both ends of the filter device, specifically, Q1
  • the source is connected to the drain of Q2
  • the drain of Q1 is connected to the positive terminal of the filter device as a DC terminal of the bidirectional converter
  • the source of Q2 is used as the negative terminal of the DC terminal of the bidirectional converter
  • the bidirectional converter the AC terminal is connected to the bidirectional selector switch.
  • the gates of Q1 and Q2 are connected to different signal outputs of the controller, and the controller outputs two control signals to control the on and off states of Q1 and Q2, respectively.
  • the control Q1 and Q2 are alternately turned on, thereby realizing rectification and inverter functions, and controlling the on-time of the switching tube in the bidirectional converter by the pulse control signal of different duty ratios outputted by the controller to realize step-up or step-down .
  • the bidirectional converter provided in this embodiment adopts a half bridge full control converter, which has fewer components, lower cost and simple control mode.
  • FIG. 7 a schematic structural diagram of another three-phase UPS circuit according to an embodiment of the present application is shown, wherein the bidirectional converter is implemented by an I-type three-level converter, and the I-type three-level converter includes: The first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the first diode D1 and the second diode D2, and Q1 to Q4 shown in FIG.
  • the MOSFET is connected to the MOSFET and the drain and source of the MOSFET are connected to a diode.
  • the cathode of the specific diode is connected to the drain and the anode is connected to the source.
  • Ql, Q2, Q3 and Q4 are connected in series. Specifically, the source of Q1 is connected to the drain of Q2, the source of Q2 is connected to the drain of Q3, the source of Q3 is connected to the drain of Q4, and the drain of Q1 is used as a bidirectional conversion.
  • One DC terminal of the device is connected to the positive pole of the filtering device, the source of Q4 is used as a negative terminal of the bidirectional converter, and the common terminal of Q2 and Q3 is connected as the alternating current terminal of the bidirectional converter.
  • the selector switch To the selector switch.
  • the gates of Q1 ⁇ Q4 are connected to the controller, and the control signals output by the controller respectively control the on and off states of the four tubes.
  • the Q1 and Q3 are controlled to be turned on (that is, when Q1 is turned on, Q3 is turned off; when Q1 is turned off, Q3 is turned on), and at the same time, Q2 is directly controlled.
  • Pass state, Q4 directly in the cutoff state;
  • the cathode of D1 is connected to the common end of Q1 and Q2, the anode is connected to the neutral line, the cathode of D2 is connected to the neutral line, and the anode is connected to the common end of Q3 and Q4.
  • the three-phase UPS circuit provided by the embodiment is implemented by a type I three-level converter, and the type I three-level converter has the advantages of small switching loss of the switch tube, and is suitable for a UPS circuit with a high switching frequency.
  • FIG. 8 a schematic structural diagram of another three-phase UPS circuit according to an embodiment of the present application is shown.
  • the bidirectional converter is implemented by using a T-type three-level converter, and the T-type three-level converter includes:
  • the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, and the fourth switch tube Q4, Q1 ⁇ Q4 are all N-channel MOSFET tubes, and a diode is connected between the drain and the source of the MOSFET tube.
  • the cathode of the specific diode is connected to the drain, and the anode is connected to the source.
  • Q1 and Q2 are connected in series and connected in parallel to both ends of the filtering device. Specifically, the source of Q1 is connected to the drain of Q2, the drain of Q1 is connected to the positive terminal of the filter device as a DC terminal of the bidirectional converter, and the source of Q2 is used as a bidirectional A DC terminal of the converter is connected to the negative pole of the filter device, and the common terminals of Q1 and Q2 are Connecting a bidirectional selection switch to the AC end of the bidirectional converter;
  • the drain of Q3 is connected to the source of Q4, the source of Q3 is connected to the common terminal of Q1 and Q2, and the drain of Q4 is connected to the neutral.
  • the gates of Q1 ⁇ Q4 are connected to the controller, and the control signals output by the controller respectively control the on and off states of the four tubes. Specifically, when the voltage of the AC terminal of the bidirectional converter is in the positive half cycle, Q1 and Q4 are controlled. Complementary conduction, at the same time, control Q3 - directly in the on state, control Q2 - directly in the off state;
  • the three-phase UPS circuit provided in this embodiment is implemented by a T-type three-level converter.
  • the switching tube in the T-type three-level converter has a high withstand voltage level and a small conduction loss, so it is suitable for a switching frequency not high.
  • switching transistors in the above embodiments can be implemented by using other forms of bidirectional semiconductor devices such as a P-channel MOSFET, an IGBT (Insulated Gate Bipolar Transistor).
  • a P-channel MOSFET MOSFET
  • IGBT Insulated Gate Bipolar Transistor
  • the present application further provides an uninterruptible power supply circuit control method, where the uninterruptible power supply circuit includes a bidirectional selection switch, a first type bidirectional converter, a second type bidirectional converter, An energy storage device, a filtering device and a controller, wherein the first end of the bidirectional selection switch is connected to the AC end of the first type bidirectional converter, and the second end is alternatively connected to the AC power source or the energy storage device, and the control end Connecting a first end of the controller; connecting the DC end of the first type of bidirectional converter to the a filtering device, wherein the control terminal is connected to the second output terminal of the controller, the first type bidirectional converter has a rectification, inverter, boost or buck function; and the DC terminal connection of the second bidirectional converter
  • the AC terminal is connected to the load
  • the control terminal is connected to the third output terminal set of the controller
  • the second type bidirectional converter has a rectifying or invert
  • the method includes: controlling the bidirectional selection switch to connect the energy storage device when the energy storage device requires charging, and controlling the first type of bidirectional converter to be in a buck state, and controlling the second class The bidirectional converter is in a rectified state;

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Inverter Devices (AREA)

Abstract

本发明公开了一种不间断电源电路，包括：双向选择开关、第一类双向变换器、第二类双向变换器、储能装置以及滤波装置，通过双向选择开关择一地连接交流电源和储能装置，第一类双向变换器设置在双向选择开关和滤波装置之间，第二类双向变换器设置在滤波装置和负载之间，第一类双向变换器和第二类双向变换器均具有整流或逆变的功能。采用双向变换器和双向选择开关，使得交流市电、储能装置和储能装置所需的充电器能够共用所述双向变换器，与现有的不间断电源电路相比，无需额外的充电器或大功率变换电路，从而降低了不间断电源电路的电路结构。

Description

一种不间断电源电路 技术领域
本发明涉及不间断电源技术领域， 特别是涉及一种不间断电源电路。 背景技术
目前，我国仅有少数地区解决了电力紧张的问题， 大部分地区和大城市还 面临电力供应紧张的问题，供电质量更不能得到保证， 市电无法满足对供电质 量要求较高的电子设备的要求。
UPS ( Uninterruptible Power System, 不间断电源系统）应运而生， UPS 的作用是当市电供电停止时能够代替市电为负载提供电能， UPS内部含有储能 装置， 当市电异常或发生中断的情况下， UPS将储能装置内的电能通过逆变转 换的方法向负载继续供电， 以使负载维持正常工作。
通常 UPS 包括以下几部分： 整流器、 逆变器、 充电电路和放电电路、 储 能装置， 现有的一种 UPS 电路， 将整流器兼作储能装置的放电电路使用， 但 仍需要充电电路， 电路结构复杂； 现有的另一种 UPS 电路， 市电和储能装置 分别使用两套独立的变换电路（整流器或逆变器）， 其中储能装置的充电电路 和放电电路共用一套大功率电池变换电路， 此种 UPS 电路需要大功率电池变 换电路， 导致 UPS 电路的结构复杂， 且大功率电池变换电路的成本较高， 综 上， 现有的 UPS电路的结构复杂。
发明内容
为解决上述技术问题，本发明实施例提供了一种不间断电源电路及其控制 方法， 以降低 UPS电路的电路结构复杂度， 技术方案如下： 第一方面， 本申请提供一种不间断电源电路， 包括： 双向选择开关、 第一 类双向变换器、 第二类双向变换器、 储能装置、 滤波装置， 以及控制器； 所述双向选择开关的第一端连接所述第一类双向变换器的交流端，第二端 择一地连接交流电源或所述储能装置 , 控制端连接控制器的第一输出端； 所述第一类双向变换器的直流端连接所述滤波装置，控制端连接所述控制 器的第二输出端集合， 所述第一类双向变换器的工作状态包括整流、 逆变、 升 压或降压；
所述第二类双向变换器的直流端连接所述滤波装置， 交流端连接负载，控 制端连接所述控制器的第三输出端集合，所述第二类双向变换器的工作状态包 括逆变或整流；
所述控制器， 用于当所述储能装置需要充电时， 输出控制所述双向选择开 关连接至所述储能装置的控制信号，且输出控制所述第一类双向变换器处于降 压状态的控制信号，以及输出控制所述第二类双向变换器处于整流状态的控制 信号； 以及当所述储能装置放电时，输出控制所述双向选择开关连接至所述储 能装置的控制信号，且输出控制所述第一类双向变换器处于升压状态的控制信 号， 以及输出控制所述第二类双向变换器处于逆变状态的控制信号。
在第一方面的第一种可能实现方式中，所述双向选择开关为继电器或双向 晶闸管。
结合第一方面的第一种可能实现方式，在第一方面的第二种可能实现方式 中， 所述双向选择开关为单刀双掷继电器， 所述单刀双掷继电器的第一动端连 接所述交流电源， 第二动端连接所述储能装置， 不动端连接所述第一类双向变 换器的交流端， 线圈的两端连接所述控制器。 结合第一方面的第一种可能实现方式，在第一方面的第三种可能实现方式 中， 所述双向选择开关包括第一类双向选择开关和第二类双向选择开关； 所述第一类双向选择开关的第一端连接所述交流电源，第二端连接所述第 一类双向变换器的交流端 , 控制端连接所述控制器；
所述第二类双向选择开关的第一端连接所述储能装置，第二端连接所述第 一类双向变换器的交流端 , 控制端连接所述控制器。
结合第一方面的第三种可能实现方式，在第一方面的第四种可能实现方式 中， 所述第一类双向选择开关和所述第二类双向选择开关均为单掷继电器， 所 述单掷继电器的第一常开触点为所述双向选择开关的第一端，所述单掷继电器 的第二常开触点为所述双向选择开关的第二端，所述单掷继电器的线圈的两端 作为所述双向选择开关的控制端连接控制器。
结合第一方面的第三种可能实现方式，在第一方面的第五种可能实现方式 中， 所述第一类双向选择开关和所述第二类双向选择开关均为双向晶闸管时 , 所述双向晶闸管的第一端为所述双向选择开关的第一端，所述双向晶闸管的第 二端为所述双向选择开关的第二端，所述双向晶闸管的门极为所述双向选择开 关的控制端连接控制器。
结合第一方面的第三种可能实现方式、第一方面的第四种可能实现方式或 第一方面的第五种可能实现方式，在第一方面的第六种可能实现方式中， 当所 述交流电源为三相交流电源时，所述第一类双向选择开关包括第一双向选择开 关、第二双向选择开关和第三双向选择开关； 所述第二类双向选择开关包括第 四双向选择开关、第五双向选择开关和第六双向选择开关； 所述第一类双向变 换器包括第一双向变换器、第二双向变换器和第三双向变换器； 所述第二类双 向变换器包括第四双向变换器、 第五双向变换器和第六双向变换器； 所述第一双向选择开关的第一端连接所述第一双向变换器的交流端，第二 端连接所述三相交流电源的 A相， 控制端连接控制器；
所述第二双向选择开关的第一端连接所述第二双向变换器的交流端，第二 端连接所述三相交流电源的 B相， 控制端连接控制器；
所述第三双向选择开关的第一端连接所述第三双向变换器的交流端，第二 端连接所述三相交流电源的 C相， 控制端连接所述控制器；
所述第四双向选择开关的第一端连接所述第一双向变换器的交流端，第二 端连接所述储能装置， 控制端连接控制器；
所述第五双向选择开关的第一端连接所述第二双向变换器的交流端，第二 端连接所述储能装置， 控制端连接控制器；
所述第六双向选择开关的第一端连接所述第三双向变换器的交流端，第二 端连接所述储能装置， 控制端连接所述控制器；
所述第一双向变换器、所述第二双向变换器和所述第三双向变换器的直流 端均连接所述滤波装置；
所述第四双向变换器、所述第五双向变换器和所述第六双向变换器的直流 端均连接所述滤波装置， 交流端均连接负载；
所述控制器用于， 分别控制 A相、 B相和 C相的交流电路连接的所述双 向选择开关、所述第一类双向变换器和所述第二类双向变换器的状态， 以单独 控制 A相交流电路、 B相交流电路和 C相交流电路的工作模式， 所述工作模 式包括交流供电模式、 储能装置供电模式和储能装置充电模式。
在第一方面的第七种可能实现方式中，所述第一类双向变换器为半桥全控 双向变换器， 所述半桥全控双向变换器包括： 第一开关管、 第二开关管； 所述第一开关管的第一端和所述第二开关管的第二端连接得到的公共端， 作为所述第一类双向变换器的交流端；
所述第一开关管的第二端和所述第二开关管的第一端均作为所述第一类 双向变换器的直流端；
所述第一开关管和所述第二开关管的控制端作为所述第一类双向变换器 的控制端。
在第一方面的第八种可能实现方式中， 所述第一类双向变换器为 I型双向 变换器， 所述 I型三电平双向变换器包括第一开关管、 第二开关管、 第三开关 管、 第四开关管、 第一二极管和第二二极管；
所述第一开关管的第一端连接所述第二开关管的第二端，所述第二开关管 的第一端连接所述第三开关管的第二端，所述第三开关管的第一端连接所述第 四开关管的第二端，所述第一开关管的第二端和所述第四开关管的第一端作为 所述第一类双向变换器的直流端，所述第二开关管和所述第三开关管的公共端 作为所述第一类双向变换器的交流端， 所述第一开关管、 第二开关管、 第三开 关管、 第四开关管的控制端均连接所述控制器；
所述第一二极管的阳极连接所述第二二极管的阴极，并连接所述滤波装置 的零线端，所述第一二极管的阴极连接所述第一开关管和所述第二开关管的公 共端； 所述第二二极管的阳极连接所述第三开关管和所述第四开关管的公共 端。
在第一方面的第九种可能实现方式中，所述第一类双向变换器为 T型双向 变换器， 所述 T型双向变换器包括： 第一开关管、 第二开关管、 第三开关管和 第四开关管；
所述第一开关管的第一端连接所述第二开关管的第二端，所述第一开关管 和所述第二开关管的公共端作为所述第一类双向变换器的交流端，所述第一开 关管的第二端和所述第二开关管的第一端作为所述第一类双向变换器的直流 端；
所述第三开关管的第二端连接所述第四开关管的第一端，所述第三开关管 的第一端连接所述第一开关管和所述第二开关管的公共端，所述第四开关管的 第二端连接所述滤波装置的零线端；
所述第一开关管、第二开关管、第三开关管和所述第四开关管的控制端均 连接控制器。
结合第一方面的第八种可能实现方式或第一方面的第九种可能实现方式， 在第一方面的第十种可能实现方式中， 所述第一开关管、 第二开关管、 第三开 关管或第四开关管均为绝缘栅双极晶体管或金属-氧化层-半导体 -场效应管； 所述绝缘栅双极晶体管的发射极为第一端、 集电极为第二端，栅极为控制 端； 所述金属-氧化层 -半导体-场效应管的源极为第一端、 漏极为第二端， 栅极 为控制端。
结合第一方面的第一种可能实现方式至第一方面的第五种可能实现方式、 第一方面的第七种可能实现方式至第一方面的第九种可能实现方式中的任意 一种实现方式，在第一方面的第十一种实现方式中， 所述滤波装置包括第一电 容和第二电容， 所述第一电容的负极连接所述第二电容的正极， 并连接交流零 线端，所述第一电容的正极和所述第二电容的负极连接作为滤波装置的两端连 接所述第一类双向变换器和所述第二类双向变换器。 本发明提供的不间断电源电路， 包括双向选择开关、 第一类双向变换器、 第二类双向变换器、储能装置和滤波装置， 双向选择开关的第一端连接第一类 双向变换器的交流端， 第二端择一地连接交流电源或储能装置， 其中， 第一类 双向变换器具有整流、 逆变、 升压、 降压的功能。 当储能装置需要充电时， 滤 波装置两端的电压经过第一类双向变换器进行降压后提供给储能装置， 此时， 第一类双向变换器充当了储能装置的充电器， 因此， 本申请提供的不间断电源 电路无需额外设置充电器或大功率电池变换电路，从而简化了不间断电源电路 的电路结构。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作简单的介绍，显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲，在不付 出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明提供的一种单相 UPS电路的电路原理示意图；
图 2为本发明提供的一种三相 UPS电路的电路原理示意图；
图 3为图 2所示电路处于交流供电模式时的工作原理示意图；
图 4a为图 2所示电路处于部分相供电、 剩余相充电模式时的工作原理示 意图；
图 4b为图 2所示电路处于部分相供电、 剩余相充电模式时的另一种工作 原理示意图；
图 5为图 2所示电路处于储能装置充 /放电模式时的工作原理示意图； 图 6为本发明实施例提供的一种三相 UPS电路的部分结构示意图； 图 7为本发明实施例提供的另一种三相 UPS电路的部分结构示意图； 图 8为本发明实施例提供的另一种三相 UPS电路的部分结构示意图。 具体实施方式 下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅是本发明一部分实施例， 而不是全 部的实施例。基于本发明中的实施例， 本领域普通技术人员在没有做出创造性 劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
请参见图 1 , 示出了本申请提供的一种单相 UPS电路的原理框图。 所述 UPS电路包括双向选择开关 1、 第一双向变换器 2、 滤波装置 3、 第 二双向变换器 4和储能装置 5 , 所述双向选择开关 1可以为单刀双掷继电器、 两个继电器或两个双向晶闸管实现。 双向选择开关 1的一端连接第一双向变换器 2的交流端，另一端择一地连 接交流电源 6和储能装置 5 , 具体的， 图 1所示的双向选择开关为单掷双刀开 关实现， 动端连接第一双向变换器 2的交流端， 第一不动端连接交流电源 6, 第二不动端连接储能装置， 控制端连接控制器的第一输出端， 通过控制器 (图 中未示出）输出的控制信号控制动端的动作，从而实现将交流电源 6或储能装 置 5接入 UPS电路。 其中， 交流电源可以为单相交流电源、 两相交流电源或三相交流电源， 其 中， 两相交流电源可以是独立的两相交流电源， 也可以是三相交流电源中的两 相交流电供电， 另一相异常的状态。 第一双向变换器 2的直流端连接滤波装置 3的两端，控制端连接控制器的 第二输出端集合， 通过控制器输出的控制信号控制第一双向变换器的工作状 态， 具体的， 该第一双向变换器具有整流、 逆变、 升压、 降压四种工作状态。 第二双向变换器 4的直流端连接滤波装置 3的两端， 交流端连接负载 7, 控制端连接控制器的第三输出端集合，通过控制器输出的控制信号控制第二双 向变换器的工作状态， 第二双向变换器 4具有整流、 逆变两种工作状态。
滤波装置 3通过电容实现， 主要作用是滤除干扰信号，还具有短时储能的 作用， 当交流电源和储能装置切换时， 中间有短暂间断时间， 此时， 通过滤波 装置短时间为负载供电。
本实施例提供的 UPS电路的工作过程如下：
交流电源正常供电时，交流电源输出的交流电通过第一双向变换器进行整 流之后， 在滤波装置 3的两端产生直流电压 +bus电压和 -bus电压， +bus电压 和 -bus电压经过第二双向变换器进行逆变之后， 得到交流电提供给负载 7。
交流电回流过程， 所述 UPS 电路连接负载具有能量反灌特性时， 负载作 为能量源，交流电网侧为负载，负载侧的能量经过第二双向变换器进行整流后， 在滤波装置 3的两端产生直流电压 +bus电压和 -bus电压， +bus电压和 -bus电 压经过第一双向变换器进行逆变之后，得到交流电提供给交流电网，从而实现 能量从负载侧流向交流电网侧， 提高了能量的利用率。
当交流电源供电异常时， 由储能装置供电，储能装置输出的直流电通过第 一双向变换器进行升压之后， 在滤波装置 3 的两端得到直流电压 +bus电压和 -bus 电压， +bus电压和 -bus电压经过第二双向变换器进行逆变之后， 得到交 流电提供给负载 7。
储能装置充电时， 储能装置两端的母线 +BUS和 -BUS作为能量源， 即滤 波装置 3的两端得到直流电压 +bus电压和 -bus电压， +bus电压和 -bus电压经 过第一双向变换器 2进行降压后，给电池充电，且充电功率与现有的额外增加 充电器电路的 UPS 电路相比， 充电功率较高， 充电能力与交流电源的主功率 相当。 其中， 所述母线 +BUS和 -BUS上的能量可以是交流电源通过第一双向 变换器提供，还可以是第二双向变换器从负载中获得， 此时的负载需具有能量 反灌特性， 即能够将能量反向提供给第二双向变换器。
需要说明的是，通过控制器输出的控制信号控制第一双向变换器和第二双 向变换器的不同工作状态之间的切换过程，通过改变第一双向变换器和第二双 向变换器内的开关管的工作状态， 最终改变双向变换器的工作状态。
本实施例提供的单相 UPS 电路， 采用的第一双向变换器和第二双向变换 器均具有能量双向流动的功能 ,通过双向选择开关将交流电源和储能装置择一 地与同一双向变换器相连，使交流电源或储能装置与双向变换器连接， 实现交 流电源与储能装置共用一个双向变换器， 且无需额外增加充电器， 因此， 降低 了 UPS电路的电路结构。
请参见图 2, 示出了本申请实施例一种三相 UPS电路的结构示意图。 所述三相 UPS电路包括三个图 1所示的单相 UPS电路， 具体包括： 第一 双向选择开关 21、 第二双向选择开关 22、 第三双向选择开关 23 , 第一双向变 换器 24、 第二双向变换器 25、 第三双向变换器 26、 第四双向变换器 27、 第五 双向变换器 28、 第六双向变换器 29, 储能装置 30和滤波装置 210。
具体的， 第一双向选择开关 21、 第二双向选择开关 22和第三双向选择开 关 23具体可以通过单刀双掷型继电器、 或者两个独立的继电器， 或两个独立 的双向晶闸管实现，图 2中的双向选择开关利用单刀双掷开关示意采用单刀双 掷型继电器的结构原理，可以通过控制器输出的控制信号控制双向选择开关的 通断状态。 第一双向选择开关 21的第一不动端连接交流电源 （电网） 的 A相， 第二 不动端连接储能装置 30, 动端连接第一双向变换器 24的交流端；
第二双向选择开关 22的第一不动端连接交流电源的 B相， 第二不动端连 接储能装置 30, 动端连接第二双向变换器 25的交流端；
第三双向选择开关 23的第一不动端连接交流电源的 C相， 第二不动端连 接储能装置 30, 动端连接第三双向变换器 26的交流端。
第一双向变换器 24、 第二双向变换器 25、 第三双向变换器 26、 第四双向 变换器 27、 第五双向变换器 28和第六双向变换器 29的直流端均并联于滤波 装置 210的两端。
第四双向变换器 27、 第五双向变换器 28和第六双向变换器 29的交流端 均连接负载 211。
本实施例中的第一双向变换器 24、 第二双向变换器 25和第三双向变换器 26 为第一类双向变换器， 此类双向变换器具有整流、 逆变、 升压、 降压四种 工作状态。 第四双向变换器 27、 第五双向变换器 28和第六双向变换器 29为 第二类双向变换器， 具有逆变和整流两种工作状态。
第一类双向变换器和第二类双向变换器均可通过半桥全控变换器、 T型三 电平变换器和 I型三电平变换器实现， 而且， 第一类双向变换器逆变和整流功 能的控制方式与第二类双向变换器逆变和整流功能的控制方式相同。
第一类双向变换器的升压、 降压功能，通过控制器输出不同占空比的脉冲 控制信号控制双向变换器内的开关管的导通时间， 最终实现双向变换器的升 压、 降压功能。
本实施例提供的三相 UPS 电路中， 三相电路均采用双向选择开关择一地 将交流电源和储能装置接入 UPS 电路中， 且能够独立控制三相电路上的三个 双向选择开关的闭合和关断的状态， 即能够独立控制 A相、 B相和 C相三个 电路的工作模式， 也即 A相、 B相和 C相三个电路的工作模式可以任意组合。 其中， 所述工作模式包括： 交流电源供电模式、 储能装置供电模式和交流电源 部分相供电， 剩余相为储能装置充电的模式。
本实施将着重对 BUS母线之前的部分进行详细介绍， 后级的第二类双向 变换器的工作过程和图 1 对应的实施例中的第二双向变换器的工作原理完全 相同， 此处不再详细介绍。
下面将结合附图对三相 UPS电路的不同工作模式的组合进行详细介绍： 1、 交流供电的工作模式下
请参见图 3 ,示出了图 2所示的三相 UPS电路均工作于交流供电的工作模 式的工作原理图。
如图 3所示，每一相电路中的双向选择开关均由两个独立的单掷继电器实 现， 具体的， A相电路中通过第一继电器 311连接 A相交流电源， 通过第二 继电器 312连接储能装置 30; B相电路中通过第三继电器 313连接 B相交流 电源， 通过第四继电器 314连接储能装置 30; C相电路中通过第五继电器 315 连接 C相交流电源， 通过第六继电器连接储能装置 30。
需要说明的是，三个相的电路中的继电器通过电感 L连接第一类双向变换 器， 电感 L用于滤波并储存能量， 后面的附图中同样包括电感 L, 下面将不再 详细介绍。
A、 B、 C 三相电路中的第一类双向变换器均采用半桥全控变换器实现， 即两个串联连接的开关管实现， 具体的开关管可以是 IGBT、 MOSFET等双向 半导体器件。
当负载较大， 且交流电源能够正常供电时， 交流电源的 A相、 B相和 C 相均处于交流供电模式， 控制器控制第一继电器 311、 第三继电器 313和第五 继电器 315的常开触点闭合， 即将 A相、 B相和 C相电路均连接交流电源， 具体的工作过程如下：
A相输出的交流电经过第一继电器后输入至第一双向变换器，经过第一双 向变换器进行整流之后， 在滤波装置 210的两端得到 +bus电压和 -bus电压， 经过后级的双向变换器进行逆变之后提供给负载；
B相输出的交流电经过第三继电器后输入至第二双向变换器，经过第二双 向变换器进行整流之后， 在滤波装置 210的两端得到 +bus电压和 -bus电压， 经过后级的双向变换器进行逆变之后提供给负载；
C相输出的交流电通过第五继电器后输入至第三双向变换器，经过第三双 向变换器进行整流之后， 在滤波装置 210的两端得到 +bus电压和 -bus电压， 经过后级的双向变换器进行逆变之后提供给负载。
若 UPS 电路连接的负载具有能量反灌特性时， 后级的负载通过第二类双 向变换器进行整流后，输送至滤波装置的两端， 再通过第一类双向变换器进行 逆变后把能量返回给交流电源 （电网）， 此过程即交流电回流过程。
2、 三相 UPS电路工作于部分相供电， 剩余相充电的模式
需要说明的是， 为了更清楚的在图中示意出三相电路的， 图 4a-图 5所示 的八、 B、 C三相连接的滤波装置（图中的 +BUS和 -BUS之间电容）为同一滤 波装置。
请参见图 4a和图 4b,示出了图 2所示的三相 UPS电路工作于交流电源的 部分相供电， 剩余相充电的模式对应的工作原理图， 此图中的三相 UPS 电路 的电路结构与图 3所示的电路结构相同， 此处不再贅述。
当负载较小， 交流电源的两相或一相电路即可满足负载的能量需求时， 剩 余相的能量可转到储能装置通道， 从而为储能装置充电。
①交流电源的三相电路中的两相交流电源为负载供电，剩余的一相交流电 路中的第一类双向变换器为储能装置充电。
具体的， 如图 4a所示， 三相电路中的 A相交流电源和 B相交流电源为负 载供电， C相电路中的第一类双向变换器为储能装置充电， 此时， 控制器控制 第一继电器 311、 第三继电器 313和第六继电器 316的常开触点闭合， 即 A相 和 B相的交流电源接通， C相电路连接储能装置，双向选择开关后级的电路的 具体工作过程如下：
A相输出的交流电经过第一继电器后，提供给第一双向变换器进行整流之 后， 在滤波装置两端连接的 +BUS母线、 -BUS母线上得到 +bus电压、 -bus电 压， 经过后级的双向变换器进行逆变之后为负载供电；
B相输出的交流电经过第三继电器后，提供给第二双向变换器进行整流之 后， 在所述 +BUS母线和 -BUS母线上得到 +bus电压和 -bus电压， 经过后级的 第五双向变换器进行逆变之后为负载供电；
C相电路中的第六双向变换器从滤波装置两端的母线上获取电能，进行逆 变后为负载供电。 同时， 前级的第三双向变换器从滤波装置两端的母线上获取 电能， 进行降压后给储能装置充电， 即 C相电路中前级的第三双向变换器给 储能装置充电， 后级的第六双向变换器给负载供电。
此种工作模式下， A相交流电和 B相交流电为母线 BUS供电， A、 B、 C 三相电路同时给负载供电， 同时， C相的前级电路给储能装置充电， 故此工作 模式下的负载的功率不能太大。
需要说明的是， 本实施例中三相电路中的任意两相交流电为负载供电， 剩 余一相为储能装置充电均可， 图 4a所示仅是一种具体的实例不能造成对本申 请的限制。
②三相交流电路中的一相为负载供电， 剩余两相为储能装置充电。
具体的， 如图 4b所示， 三相电路中的 A相电路为负载供电， B相和 C相 电路为储能装置充电， 此时， 控制器控制第一继电器 311、 第四继电器 314和 第六继电器 316的常开触点闭合， 即 A相电路连接 A相交流电源， B相和 C 相连接储能装置， 双向选择开关后级的电路的具体工作过程如下：
A相输出的交流电经过第一继电器 311 输送至第一双向变换器进行整流 后，在滤波装置的两端母线 BUS上得到 +bus电压和 -bus电压， +bus电压和 -bus 电压经过第四双向变换器进行逆变后提供给负载；
B相电路中的第五双向变换器从母线 BUS上取电， 进行逆变后为负载供 电。 同时， 前级的第二双向变换器从母线 BUS上取电， 为储能装置充电； 同理， C相电路中的第六双向变换器从母线 BUS上取电， 经过第六双向 变换器进行逆变之后为负载供电； 同时， 前级的第三双向变换器从母线 BUS 上取电给储能装置充电。
此工作模式下， A相交流电为母线 BUS供电， A、 B、 C三相电路同时给 负载供电， 同时， B相电路和 C相电路给储能装置充电， 故此种工作模式下的 负载功率不能太大。
需要说明的是， 本实施例中三相电路中的任意一相交流电为负载供电， 剩 余两相为储能装置充电均可， 图 4b所示仅是一种具体的实例不能造成对本申 请的限制。
此种工作模式下， 负载越小， 储能装置的充电功率越大， 最大充电功率能 够达到供电功率相当。
本实施例中的三相 UPS 电路的三个相电路能够处于不同的工作状态， 当 负载需要的能量不大时，可以使三个相电路中的部分相工作于交流电供电的状 态下， 剩余相工作于为储能装置充电的状态下， 避免了输入电网的电能浪费， 最大程度地提高了输入电网的利用率。
3、 储能装置放电工作模式
请参见图 5, 示出了图 2所示的三相 UPS电路工作于储能装置充 /放电的 工作模式时的工作原理图。
A: 储能装置放电模式， 当三相交流电源供电异常时， 由储能装置放电对 负载进行供电， 保证负载供电正常， 具体可以分为以下几种情况：
®A、 B、 C三相交流电都异常时， A相、 B相和 C相三相电路均工作于 储能装置放电模式， 此时， 控制器控制第二继电器、 第四继电器和第六继电器 的常开触点闭合， A相、 B相和 C相三相电路均将储能装置接入电路中， 具体 的工作过程具体如下：
储能装置输出的电能经过第二类双向选择开关（A、 B、 C 三相分别通过 第二继电器、 第四继电器和第六继电器）分别提供给第一双向变换器、 第二双 向变换器和第三双向变换器进行整流后， 在滤波装置的两端产生 +bus 电压和 -bus 电压， +bus 电压和 -bus电压通过第四双向变换器、 第五双向变换器和第 六双向变换器进行逆变后， 提供给负载。 ②交流电源的部分相供电异常时，供电异常相的电路工作于储能装置放电 模式， 供电正常相的电路工作于交流供电模式；
具体的， 假设仅有 A相交流电供电异常， 此时， 控制器控制 A相交流电 路中第二继电器的常开触点闭合， 使储能装置 30为负载供电， 具体的供电过 程与上述的三相交流电均处于供电异常状态时的储能装置供电过程相似，此处 不再赘述。
同理， 仅有 B相或 C相交流电供电异常， 或者 A相、 B相、 C相中的任 一相交流电供电异常时， 储能装置的放电过程与 A相交流电供电异常时储能 装置的放电管过程相似， 此处不再——叙述。
B, 储能装置充电模式
①三相交流电源的三相电路均正常时，部分相的电路工作于交流供电的状 态， 剩余相可以为储能装置充电， 具体的工作过程与上述的三相 UPS 电路工 作于部分相供电， 剩余相充电的模式的工作过程相同， 此处不再贅述。
②三相交流电源的三个相均处于交流供电异常状态时，三相的第一类双向 变换器均充当充电器， 此时， 三相电路中的第二类双向变换器从负载取电， 经 过第二类双向变换器进行整流后 ,在母线 +BUS和 -BUS上产生 +bus电压和 -bus 电压， 并经过前级的第一类双向变换器进行降压后为储能装置充电。 此时， A 相、 B相和 C相三个电路均处于充电状态， 充电功率达到最大值。
上述任一项实施例中的任意一个双向选择开关均可通过单刀双掷型继电 器、 两个独立的单掷继电器或两个独立的双向晶闸管实现。
其中，双向选择开关通过两个独立的单掷继电器实现的示意图具体参见图 3-图 5, 具体的， 参见图 3以 A相电路连接的第一继电器和第二继电器为例进 行说明， 其他相的继电器的连接关系与 A相电路的继电器的连接关系相同， 此处不再贅述。
第一继电器 311 的第一常开触点连接 A相交流电源， 第二常开触点连接 第一双向变换器的交流端 ,线圈连接控制器 ,控制器通过控制线圈的得电与否， 控制第一继电器的常开触点闭合或断开， 进而控制接入 A相电路的电源的类 型， 交流电源或储能装置。
第二继电器 312的第一常开触点连接储能装置，第二常开触点连接第一双 向变换器的交流端， 线圈连接控制器。
如图 6所示， 示出了本申请实施例另一种三相 UPS电路的部分结构示意 图， 与图 3所示的电路不同的是， 双向选择开关通过双向晶闸管实现， A、 B、 C三相电路均包括两个双向晶闸管， 其中， 一个双向晶闸管与交流电源连接， 另一个双向晶闸管与储能装置连接，以实现将交流电源和储能装置择一地接入 UPS电路中， 下面以 A相电路为例进行说明 , B相电路和 C相电路与 A相相 同， 此处不再贅述。
第一双向晶闸管 SCR1的第一端连接 A相交流电源，第二端连接第一双向 变换器的交流端，控制端连接控制器， 通过控制器输出的控制信号控制第一双 向晶闸管的导通或关断。
第二双向晶闸管 SCR2的第一端连接 B相交流电源，第二端连接第二双向 变换器的交流端， 控制端连接控制器。
如图 6所示， 本实施例中的双向变换器具体采用半桥全控变换器实现。 具体的 , 以 A相电路为例进行说明 , B、 C两相的电路结构与 A相相同。 所述半桥全控变换器包括第一开关管 Q1和第二开关管 Q2, 本实施例中的 Q1 和 Q2 具体为 N 沟道的 MOSFET ( Metal-Oxide- Semiconductor Field-Effect Transistor, 金属-氧化物-半导体 -场效应晶体管）， Q1和 Q2串联后并联与滤波 装置的两端， 具体的， Q1的源极连接 Q2的漏极， Q1的漏极作为双向变换器 的一个直流端连接滤波装置的正极， Q2的源极作为双向变换器的一个直流端 连接滤波装置的负极， Q1和 Q2的公共端作为双向变换器的交流端连接双向 选择开关。
Q1和 Q2的栅极连接控制器的不同的信号输出端， 控制器输出两个控制 信号分别控制 Q1和 Q2的导通和关断状态。具体的，控制 Q1和 Q2交替导通， 从而实现整流、逆变功能，通过控制器输出的不同占空比的脉冲控制信号控制 双向变换器内的开关管的导通时间实现升压或降压。
本实施例提供的双向变换器采用半桥全控变换器， 其器件组成较少， 成本 低， 控制方式简单。
如图 7所示， 示出了本申请实施例另一种三相 UPS电路的结构示意图， 其中的双向变换器采用 I型三电平变换器实现， 所述 I型三电平变换器包括： 第一开关管 Ql、 第二开关管 Q2、 第三开关管 Q3、 第四开关管 Q4, 第一二极 管 D1和第二二极管 D2, 图 8所示的 Q1〜Q4均为 N沟道的 MOSFET管且 MOSFET 管的漏极和源极之间连接二极管， 具体的二极管的阴极连接漏极， 阳极连接源极。
Ql、 Q2、 Q3和 Q4依次串联， 具体的， Q1的源极连接 Q2的漏极， Q2 的源极连接 Q3的漏极， Q3的源极连接 Q4的漏极， Q1的漏极作为双向变换 器的一个直流端连接滤波装置的正极， Q4的源极作为双向变换器的一个直流 端连接滤波装置的负极， Q2和 Q3 的公共端作为双向变换器的交流端连接双 向选择开关。
Q1〜Q4 的栅极均连接控制器， 控制器输出的控制信号分别控制四个管的 导通和关断状态。
具体的， 当双向变换器的交流端的电压处于正半周时， 控制 Q1和 Q3互 补导通（即 Q1导通时， Q3截止； Q1截止时， Q3导通）， 同时， 控制 Q2— 直处于导通状态， Q4—直处于截止状态；
当双向变换器的交流端的电压处于负半周时， 控制 Q2和 Q4互补导通， 同时， 控制 Q3—直处于导通状态， Q1—直处于截止状态， 最终实现整流、 逆变；通过控制器输出的不同占空比的脉冲控制信号控制双向变换器内的开关 管的导通时间实现升压、 降压的功能。
D1的阴极连接 Q1和 Q2的公共端， 阳极连接零线， D2的阴极连接零线， 阳极连接 Q3和 Q4的公共端。
本实施例提供的三相 UPS电路采用 I型三电平变换器实现， I型三电平 变换器具有开关管开关损耗小的优点， 适用于开关频率较高的 UPS电路中。
如图 8所示， 示出了本申请实施例另一种三相 UPS电路的结构示意图， 其中， 双向变换器采用 T型三电平变换器实现， 所述 T型三电平变换器包括: 第一开关管 Ql、 第二开关管 Q2、 第三开关管 Q3、 第四开关管 Q4, Q1〜Q4 均为 N沟道的 MOSFET管，且 MOSFET管的漏极和源极之间连接二极管，具 体的二极管的阴极连接漏极， 阳极连接源极。
Q1和 Q2串联后并联于滤波装置的两端， 具体的， Q1的源极连接 Q2的 漏极， Q1的漏极作为双向变换器的一个直流端连接滤波装置的正极， Q2的源 极作为双向变换器的一个直流端连接滤波装置的负极， Q1和 Q2的公共端作 为双向变换器的交流端连接双向选择开关；
Q3的漏极连接 Q4的源极， Q3的源极连接 Q1和 Q2的公共端， Q4的漏 极连接零线。
Q1〜Q4 的栅极均连接控制器， 控制器输出的控制信号分别控制四个管的 导通和关断状态， 具体的， 当双向变换器的交流端的电压处于正半周时， 控制 Q1和 Q4互补导通， 同时， 控制 Q3—直处于导通状态， 控制 Q2—直处于截 止状态；
当双向变换器的交流端的电压处于负半周时， 控制 Q2和 Q3互补导通， 控制 Q4—直处于导通状态， Q1—直处于截止状态， 最终实现整流、 逆变功 能；通过控制器输出的不同占空比的脉冲控制信号控制双向变换器内的开关管 的导通时间实现升压、 降压的功能。
本实施例提供的三相 UPS电路采用 T型三电平变换器实现， T型三电平 变换器中的开关管的耐压等级较高， 导通损耗小， 因此适用于开关频率不高的
UPS电路中。
本领域技术人员可以理解的是，以上实施例中的开关管均可以采用 P沟道 的 MOSFET管、 IGBT( Insulated Gate Bipolar Transistor,绝缘栅双极型晶体管 ) 等其他形式的双向半导体器件实现。
相应于上述的不间断电源电路的实施例，本申请还提供一种不间断电源电 路控制方法， 所述不间断电源电路包括双向选择开关、 第一类双向变换器、 第 二类双向变换器、储能装置、 滤波装置和控制器， 所述双向选择开关的第一端 连接所述第一类双向变换器的交流端 ,第二端择一地连接交流电源或所述储能 装置，控制端连接控制器的第一端； 所述第一类双向变换器的直流端连接所述 滤波装置，控制端连接所述控制器的第二输出端集合， 所述第一类双向变换器 具有整流、 逆变、 升压或降压功能； 所述第二类双向变换器的直流端连接所述 滤波装置， 交流端连接负载， 控制端连接所述控制器的第三输出端集合， 所述 第二类双向变换器具有整流或逆变功能；
所述方法包括： 当所述储能装置需要充电时，控制所述双向选择开关连接 所述储能装置， 并控制所述第一类双向变换器处于降压状态， 以及控制所述第 二类双向变换器处于整流状态；
当所述储能装置放电时，控制所述双向选择开关连接所述储能装置， 并控 制所述第一类双向变换器处于升压状态，以及控制所述第二类双向变换器处于 逆变状态。
以上所述仅是本发明的具体实施方式，应当指出，对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。
+

Claims

权 利 要 求
1、 一种不间断电源电路， 其特征在于， 包括： 双向选择开关、 第一类双 向变换器、 第二类双向变换器、 储能装置、 滤波装置， 以及控制器；
所述双向选择开关的第一端连接所述第一类双向变换器的交流端，第二端 择一地连接交流电源或所述储能装置， 控制端连接控制器的第一输出端； 所述第一类双向变换器的直流端连接所述滤波装置，控制端连接所述控制 器的第二输出端集合， 所述第一类双向变换器的工作状态包括整流、 逆变、 升 压或降压；
所述第二类双向变换器的直流端连接所述滤波装置， 交流端连接负载，控 制端连接所述控制器的第三输出端集合，所述第二类双向变换器的工作状态包 括逆变或整流；
所述控制器， 用于当所述储能装置需要充电时， 输出控制所述双向选择开 关连接至所述储能装置的控制信号，且输出控制所述第一类双向变换器处于降 压状态的控制信号，以及输出控制所述第二类双向变换器处于整流状态的控制 信号； 以及当所述储能装置放电时，输出控制所述双向选择开关连接至所述储 能装置的控制信号，且输出控制所述第一类双向变换器处于升压状态的控制信 号， 以及输出控制所述第二类双向变换器处于逆变状态的控制信号。
2、 根据权利要求 1所述的不间断电源电路， 其特征在于， 所述双向选择 开关为继电器或双向晶闸管。
3、 根据权利要求 2所述的不间断电源电路， 其特征在于， 所述双向选择 开关为单刀双掷继电器， 所述单刀双掷继电器的第一动端连接所述交流电源， 第二动端连接所述储能装置， 不动端连接所述第一类双向变换器的交流端， 线 圈的两端连接所述控制器。
4、 根据权利要求 2所述的不间断电源电路， 其特征在于， 所述双向选择 开关包括第一类双向选择开关和第二类双向选择开关；
所述第一类双向选择开关的第一端连接所述交流电源，第二端连接所述第 一类双向变换器的交流端， 控制端连接所述控制器；
所述第二类双向选择开关的第一端连接所述储能装置，第二端连接所述第 一类双向变换器的交流端 , 控制端连接所述控制器。
5、 根据权利要求 4所述的不间断电源电路， 其特征在于， 所述第一类双 向选择开关和所述第二类双向选择开关均为单掷继电器，所述单掷继电器的第 一常开触点为所述双向选择开关的第一端，所述单掷继电器的第二常开触点为 所述双向选择开关的第二端，所述单掷继电器的线圈的两端作为所述双向选择 开关的控制端连接控制器。
6、 根据权利要求 4所述的不间断电源电路， 其特征在于， 所述第一类双 向选择开关和所述第二类双向选择开关均为双向晶闸管时 ,所述双向晶闸管的 第一端为所述双向选择开关的第一端，所述双向晶闸管的第二端为所述双向选 择开关的第二端，所述双向晶闸管的门极为所述双向选择开关的控制端连接控 制器。
7、 根据权利要求 4-6任一项所述的不间断电源电路， 其特征在于， 当所 述交流电源为三相交流电源时，所述第一类双向选择开关包括第一双向选择开 关、第二双向选择开关和第三双向选择开关； 所述第二类双向选择开关包括第 四双向选择开关、第五双向选择开关和第六双向选择开关； 所述第一类双向变 换器包括第一双向变换器、第二双向变换器和第三双向变换器； 所述第二类双 向变换器包括第四双向变换器、 第五双向变换器和第六双向变换器； 所述第一双向选择开关的第一端连接所述第一双向变换器的交流端，第二 端连接所述三相交流电源的 A相， 控制端连接控制器；
所述第二双向选择开关的第一端连接所述第二双向变换器的交流端，第二 端连接所述三相交流电源的 B相， 控制端连接控制器；
所述第三双向选择开关的第一端连接所述第三双向变换器的交流端，第二 端连接所述三相交流电源的 C相， 控制端连接所述控制器；
所述第四双向选择开关的第一端连接所述第一双向变换器的交流端，第二 端连接所述储能装置， 控制端连接控制器；
所述第五双向选择开关的第一端连接所述第二双向变换器的交流端，第二 端连接所述储能装置， 控制端连接控制器；
所述第六双向选择开关的第一端连接所述第三双向变换器的交流端，第二 端连接所述储能装置， 控制端连接所述控制器；
所述第一双向变换器、所述第二双向变换器和所述第三双向变换器的直流 端均连接所述滤波装置；
所述第四双向变换器、所述第五双向变换器和所述第六双向变换器的直流 端均连接所述滤波装置， 交流端均连接负载；
所述控制器用于， 分别控制 A相、 B相和 C相的交流电路连接的所述双 向选择开关、所述第一类双向变换器和所述第二类双向变换器的状态， 以单独 控制 A相交流电路、 B相交流电路和 C相交流电路的工作模式， 所述工作模 式包括交流供电模式、 储能装置供电模式和储能装置充电模式。
8、 根据权利要求 1所述的不间断电源电路， 其特征在于， 所述第一类双 向变换器为半桥全控双向变换器，所述半桥全控双向变换器包括：第一开关管、 第二开关管；
所述第一开关管的第一端和所述第二开关管的第二端连接得到的公共端， 作为所述第一类双向变换器的交流端；
所述第一开关管的第二端和所述第二开关管的第一端均作为所述第一类 双向变换器的直流端；
所述第一开关管和所述第二开关管的控制端作为所述第一类双向变换器 的控制端。
9、 根据权利要求 1所述的不间断电源电路， 其特征在于， 所述第一类双 向变换器为 I型双向变换器， 所述 I型三电平双向变换器包括第一开关管、 第 二开关管、 第三开关管、 第四开关管、 第一二极管和第二二极管；
所述第一开关管的第一端连接所述第二开关管的第二端，所述第二开关管 的第一端连接所述第三开关管的第二端，所述第三开关管的第一端连接所述第 四开关管的第二端，所述第一开关管的第二端和所述第四开关管的第一端作为 所述第一类双向变换器的直流端，所述第二开关管和所述第三开关管的公共端 作为所述第一类双向变换器的交流端， 所述第一开关管、 第二开关管、 第三开 关管、 第四开关管的控制端均连接所述控制器；
所述第一二极管的阳极连接所述第二二极管的阴极，并连接所述滤波装置 的零线端，所述第一二极管的阴极连接所述第一开关管和所述第二开关管的公 共端； 所述第二二极管的阳极连接所述第三开关管和所述第四开关管的公共 端。
10、 根据权利要求 1所述的不间断电源电路， 其特征在于， 所述第一类双 向变换器为 T型双向变换器， 所述 Τ型双向变换器包括： 第一开关管、 第二 开关管、 第三开关管和第四开关管；
所述第一开关管的第一端连接所述第二开关管的第二端，所述第一开关管 和所述第二开关管的公共端作为所述第一类双向变换器的交流端，所述第一开 关管的第二端和所述第二开关管的第一端作为所述第一类双向变换器的直流 端；
所述第三开关管的第二端连接所述第四开关管的第一端，所述第三开关管 的第一端连接所述第一开关管和所述第二开关管的公共端，所述第四开关管的 第二端连接所述滤波装置的零线端；
所述第一开关管、第二开关管、第三开关管和所述第四开关管的控制端均 连接控制器。
11、 根据权利要求 9或 10所述的不间断电源电路， 其特征在于， 所述第 一开关管、第二开关管、第三开关管或第四开关管均为绝缘栅双极晶体管或金 属-氧化层 -半导体-场效应管；
所述绝缘栅双极晶体管的发射极为第一端、 集电极为第二端，栅极为控制 端； 所述金属-氧化层 -半导体-场效应管的源极为第一端、 漏极为第二端， 栅极 为控制端。
12、根据权利要求 1-6、 8-10任一项所述的不间断电源电路， 其特征在于， 所述滤波装置包括第一电容和第二电容，所述第一电容的负极连接所述第二电 容的正极， 并连接交流零线端， 所述第一电容的正极和所述第二电容的负极连 接作为滤波装置的两端连接所述第一类双向变换器和所述第二类双向变换器。
PCT/CN2014/070449 2013-07-05 2014-01-10 一种不间断电源电路 Ceased WO2015000292A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14790477.5A EP2846436B1 (en) 2013-07-05 2014-01-10 Uninterruptible power supply circuit
US14/533,439 US9520718B2 (en) 2013-07-05 2014-11-05 Uninterruptible power supply circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310282409.2A CN103368231B (zh) 2013-07-05 2013-07-05 一种不间断电源电路
CN201310282409.2 2013-07-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/533,439 Continuation US9520718B2 (en) 2013-07-05 2014-11-05 Uninterruptible power supply circuit

Publications (1)

Publication Number Publication Date
WO2015000292A1 true WO2015000292A1 (zh) 2015-01-08

Family

ID=49369001

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/070449 Ceased WO2015000292A1 (zh) 2013-07-05 2014-01-10 一种不间断电源电路

Country Status (4)

Country Link
US (1) US9520718B2 (zh)
EP (1) EP2846436B1 (zh)
CN (1) CN103368231B (zh)
WO (1) WO2015000292A1 (zh)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103368231B (zh) 2013-07-05 2015-03-11 华为技术有限公司 一种不间断电源电路
KR101582850B1 (ko) * 2013-12-30 2016-01-07 주식회사 효성 Ｈｖｄｃ 시스템의 전원 이중화 장치 및 그 제어방법
CN104901410A (zh) * 2014-03-04 2015-09-09 伊顿公司 一种ups电路
CN105703470A (zh) * 2014-11-28 2016-06-22 力博特公司 多电源供电系统和用于该多电源供电系统的方法
EP3240139A4 (en) * 2014-12-25 2018-08-15 Toshiba Mitsubishi-Electric Industrial Systems Corporation Uninterruptible power supply device
CN104852450B (zh) * 2015-04-07 2017-03-01 佛山市柏克新能科技股份有限公司 一种电池组恒流恒压充电方法
CN104753140A (zh) * 2015-04-07 2015-07-01 佛山市柏克新能科技股份有限公司 一种双t型三电平在线式ups电源
CN104901536A (zh) * 2015-06-08 2015-09-09 南车青岛四方机车车辆股份有限公司 双向dc-dc升降压系统及储能系统
CN105071670A (zh) * 2015-08-13 2015-11-18 厦门科华恒盛股份有限公司 三相整流升压电路及其控制方法以及不间断电源
CN105141153B (zh) * 2015-08-13 2018-07-24 厦门科华恒盛股份有限公司 一种三相整流升压电路及其控制方法以及不间断电源
SK7978Y1 (sk) * 2015-09-21 2018-01-04 Slovenska Polnohospodarska Univerzita V Nitre Spôsob a zariadenie na napájanie jednofázovej elektrickej zásuvky pri výpadku jednej fázy alebo viacerých fáz
US9853455B1 (en) * 2015-12-31 2017-12-26 X Development Llc Battery for fault handling in bidirectional power conversion systems
JP6883396B2 (ja) * 2016-08-25 2021-06-09 矢崎総業株式会社 急速充電装置
CN107785987B (zh) * 2016-08-25 2023-06-09 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 在线式不间断电源
CN107809131A (zh) * 2016-09-06 2018-03-16 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 不间断电源
US11053096B2 (en) 2017-08-28 2021-07-06 Otis Elevator Company Automatic rescue and charging system for elevator drive
CN108599362A (zh) * 2018-05-22 2018-09-28 郑州云海信息技术有限公司 一种不间断电源测试设备的无缝切换方法及其装置
CN108551206B (zh) * 2018-06-07 2023-11-24 杭州创乐电子科技有限公司 电源模块使用交流与直流电源供电的切换装置及方法
US11984759B2 (en) 2019-05-20 2024-05-14 The University Of North Carolina At Charlotte Grid ancillary service with uninterruptible power supply
CN110429822B (zh) * 2019-08-07 2021-04-02 西北工业大学 一种t型llc谐振变换器及其控制方法
CN112448594B (zh) * 2019-08-28 2022-05-31 台达电子工业股份有限公司 间接式矩阵转换器及整流模块
CN110995047B (zh) * 2019-09-03 2022-06-07 山特电子（深圳）有限公司 多输入功率变换器及其控制方法和包括其的不间断电源
CN111030458B (zh) * 2019-10-12 2021-11-02 山特电子（深圳）有限公司 多输入功率变换器及其控制方法和包括其的不间断电源
CN110995001B (zh) * 2019-10-12 2021-08-24 山特电子（深圳）有限公司 多输入功率变换器及其控制方法和包括其的不间断电源
US11349336B2 (en) 2020-03-03 2022-05-31 Delta Electronics, Inc. Method for operating power factor correction circuit and method for operating uninterruptible power supply apparatus
CN113938045B (zh) * 2020-06-28 2025-08-19 株洲中车时代电气股份有限公司 一种四流制辅助变流器、供电方法及系统
DE102020119104B3 (de) * 2020-07-21 2021-09-16 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Gleichrichteranordnung
CN112039052B (zh) * 2020-07-30 2022-06-07 科华恒盛股份有限公司 电源装置及其控制方法
US11489455B2 (en) * 2020-08-13 2022-11-01 Entrantech Inc. AC and persistent DC co-distritbution
US12328020B2 (en) 2020-08-13 2025-06-10 Entrantech Inc. System for swappable battery module charging and discharging
US11777323B2 (en) 2020-08-13 2023-10-03 Entrantech Inc. Sequential power discharge for batteries in a power system
US11605970B2 (en) 2020-08-13 2023-03-14 Entrantech Inc. Persistent DC power and control switch
CN113162414B (zh) * 2021-05-06 2022-12-20 天津大学 用于电能变换器的基本单元、电能变换器及通用功率接口
US11831167B2 (en) 2021-08-13 2023-11-28 Entrantech Inc. Persistent Dc circuit breaker
CN115882578A (zh) * 2021-09-29 2023-03-31 硕天科技股份有限公司 不断电系统及其电源转换电路
CN114327014B (zh) * 2021-12-25 2024-10-18 深圳市锐宝智联信息有限公司 一种应用于工业信息安全的网络切换电路
US12374891B2 (en) 2022-02-25 2025-07-29 Sponge Microgrids Inc. System, controller, and method for predictive control of energy management for a segmented load centre
CN117792126A (zh) * 2022-09-21 2024-03-29 维谛技术有限公司 一种不间断电源整流变换器及其控制方法
CN118539585A (zh) * 2023-02-22 2024-08-23 山特电子（深圳）有限公司 一种多输入电力变换器及包括其的不间断电源
JP2024169143A (ja) * 2023-05-25 2024-12-05 株式会社豊田自動織機 電力変換装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241217A (en) * 1991-11-07 1993-08-31 Premier Power, Inc. UPS with input commutation between AC and DC sources of power
JP2000358378A (ja) * 1999-06-10 2000-12-26 Mitsubishi Electric Corp 無停電電源装置
CN102427266A (zh) * 2012-01-04 2012-04-25 广东易事特电源股份有限公司 一种多功能光伏ups系统及其控制方法
CN202713163U (zh) * 2012-05-18 2013-01-30 深圳市健网科技有限公司 一种基于三相整流的双电源供电系统
CN103368231A (zh) * 2013-07-05 2013-10-23 华为技术有限公司 一种不间断电源电路

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6160722A (en) * 1999-08-13 2000-12-12 Powerware Corporation Uninterruptible power supplies with dual-sourcing capability and methods of operation thereof
CN1421978A (zh) 2001-11-22 2003-06-04 台达电子工业股份有限公司 三相不间断电源供应系统
CN1153331C (zh) * 2002-02-01 2004-06-09 艾默生网络能源有限公司 用于不间断电源的功率因数校正电路
EP2025051B1 (en) * 2006-06-06 2014-12-31 Ideal Power Inc. Universal power converter
TWI315118B (en) * 2006-07-12 2009-09-21 Delta Electronics Inc Method for controlling uninterruptible power supply apparatus
US8146714B2 (en) * 2006-12-14 2012-04-03 Otis Elevator Company Elevator system including regenerative drive and rescue operation circuit for normal and power failure conditions
US7688048B2 (en) 2007-02-21 2010-03-30 American Power Conversion Corporation 3-phase high power UPS
CN101572429B (zh) * 2009-04-27 2012-07-04 艾默生网络能源有限公司 一种ups系统
CN102593945A (zh) * 2012-02-20 2012-07-18 华为技术有限公司 一种不间断电源电路
WO2014057298A1 (en) * 2012-10-11 2014-04-17 American Power Conversion Corporation Circuit and method for providing an uninterruptible power supply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241217A (en) * 1991-11-07 1993-08-31 Premier Power, Inc. UPS with input commutation between AC and DC sources of power
JP2000358378A (ja) * 1999-06-10 2000-12-26 Mitsubishi Electric Corp 無停電電源装置
CN102427266A (zh) * 2012-01-04 2012-04-25 广东易事特电源股份有限公司 一种多功能光伏ups系统及其控制方法
CN202713163U (zh) * 2012-05-18 2013-01-30 深圳市健网科技有限公司 一种基于三相整流的双电源供电系统
CN103368231A (zh) * 2013-07-05 2013-10-23 华为技术有限公司 一种不间断电源电路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2846436A4 *

Also Published As

Publication number Publication date
US9520718B2 (en) 2016-12-13
CN103368231B (zh) 2015-03-11
US20150054343A1 (en) 2015-02-26
EP2846436A1 (en) 2015-03-11
EP2846436B1 (en) 2016-12-28
EP2846436A4 (en) 2015-07-08
CN103368231A (zh) 2013-10-23

Similar Documents

Publication Publication Date Title
CN103368231B (zh) 一种不间断电源电路
CN100578888C (zh) 一种不间断电源
EP2706653B1 (en) Five-level power converter, controlling method and controlling device thereof
US8143744B2 (en) Method and apparatus for providing uninterruptible power
WO2012167691A1 (zh) 逆变装置及应用其的太阳能光伏并网系统
CN103187785B (zh) 一种ups模块及ups系统
CN112224056A (zh) 一种车辆及其能量转换装置
CN117013680A (zh) 一种不间断电源和供电系统
CN118337049B (zh) 一种三相ups系统及其控制方法
WO2013097526A1 (zh) 不间断电源的dc/dc电路
CN115296536B (zh) 一种双向dc-dc变换器
CN107979297B (zh) 一种基于复用电感的ac/dc变流器
CN212115182U (zh) 交直流双向变换装置
CN206226093U (zh) 在线式双变换ups系统
CN118117726A (zh) 一种不间断电源和供电系统
CN108808833A (zh) 一种ups电路
CN109462334B (zh) Dc/dc双向逆变电路及其控制方法
CN207827607U (zh) 交流直流双向转换电路和电梯自动救援操作装置
CN118381341A (zh) 一种工频隔离型多电平能量路由器
CN212137355U (zh) 一种ups的电池充电系统及ups
CN115864835A (zh) 一种单相交流电池组模块
CN207184328U (zh) 一种功率单元的电源系统及功率单元
CN102545566A (zh) 一种h桥和半h桥通用电路模块
CN105515041B (zh) 为电网提供有功和无功电流支持的并网逆变器
CN223843545U (zh) 供电系统

Legal Events

Date Code Title Description
REEP Request for entry into the european phase

Ref document number: 2014790477

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2014790477

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14790477

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE