WO2019076165A1 - Dispositif d'étalonnage de puissance de charge non linéaire et d'énergie électrique - Google Patents

Dispositif d'étalonnage de puissance de charge non linéaire et d'énergie électrique Download PDF

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Publication number
WO2019076165A1
WO2019076165A1 PCT/CN2018/104725 CN2018104725W WO2019076165A1 WO 2019076165 A1 WO2019076165 A1 WO 2019076165A1 CN 2018104725 W CN2018104725 W CN 2018104725W WO 2019076165 A1 WO2019076165 A1 WO 2019076165A1
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branch
standard
electronic switch
current
waveform
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Chinese (zh)
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肖伟峰
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Guangdongorient Telecommunication Technology Co Ltd
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Guangdongorient Telecommunication Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Definitions

  • the present invention relates to the field of nonlinear waveform measurement techniques, and more particularly to a non-linear load power and power verification device.
  • the China Metrology Institute has proposed two indirect test waveforms for the measurement of the dynamic accuracy of an energy meter or device, but since the test waveform is no longer a sine wave, the test waveform of the tracer for the reference standard module is Sine wave, so it is impossible to directly prove that the accuracy of this standard meter module under non-linear load conditions is "trustworthy".
  • a non-linear load power and electric energy verification device comprises: a standard power source module, a standard meter module and a test circuit;
  • the test circuit includes a first branch, a second branch, and a trunk, the first branch and the second branch being connected to a first end of the standard power source module, the first branch And the second branch is connected to the second end of the standard power source module through the trunk road, and the standard meter module is serially connected to the first branch or the trunk road;
  • the standard power source module is configured to directly or indirectly input a nonlinear waveform to the first branch and the second branch, wherein the nonlinear waveform of the first branch and the second branch
  • the nonlinear waveform superposition is equal to a complete sine wave waveform
  • the first branch is used to serially connect the test table.
  • the standard power source module includes a main control unit, a waveform generator unit, and a power amplifier unit;
  • the main control unit is connected to the waveform generator unit, and the waveform generator unit is connected to the power amplifier unit;
  • the main control unit is configured to generate a three-phase voltage and a three-phase current signal according to the control instruction, and divide each phase current into two discrete digital signals, and send the discrete digital signals to the waveform generator unit. Wherein, the waveforms corresponding to the two discrete digital signals of each phase current are combined into a complete sine wave waveform;
  • the waveform generator unit is configured to receive the discrete digital signals, and convert the discrete digital signals into analog signals, and output the analog signals to the power amplifier unit, wherein two of each phase current
  • the waveform corresponding to the analog signal is a non-linear waveform, and the two non-linear waveforms of the same phase current are superimposed to be equal to one complete sine wave waveform;
  • the power amplifier unit is configured to amplify the analog signal and output through the three voltages and six current outputs;
  • Two output ends of one phase current of the power amplifier are respectively connected to the first branch and the second branch, and the first branch and the second branch respectively pass through the trunk
  • the main control unit is connected.
  • the method further includes a first electronic switch, the second electronic switch, and a controller, the first electronic switch is serially connected to the first branch, and the second electronic switch is connected to the second The controller is respectively connected to the control end of the first electronic switch and the control end of the second electronic switch.
  • the standard power source module includes a power output unit, a first electronic switch, a second electronic switch, and a controller, and the first end of the power output unit passes the first electronic switch and the first Connected to a road, the first end of the power output unit is connected to the second branch through the second electronic switch, and the first branch and the second branch respectively pass through the trunk The second end of the power output unit is connected.
  • the standard table module includes an analog sampling unit and a measurement calculation unit, the power amplifier unit is connected to the analog sampling unit, the analog sampling unit is connected to the measurement calculation unit, and the measurement calculation The unit is connected to the main control unit.
  • the standard meter module is serially connected to the first branch.
  • the standard meter module is serially connected to the trunk.
  • a current detecting module is further included, the current detecting module is serially connected to the dry circuit, and the current detecting module is connected to the controller.
  • a balance impedance is also included, the balanced impedance being coupled in series on the second branch.
  • the first electronic switch MOS transistor one of an IGBT and a triode
  • the second electronic switch MOS transistor one of an IGBT and a triode
  • the invention has the beneficial effects that the nonlinear waveform is directly or indirectly input to the first branch and the second branch through the standard power source module, so that the test table serially connected to the first branch can measure the nonlinear waveform, and By comparing with the measured data of the trunk or the standard meter module on the first branch, it is possible to test whether the nonlinear energy meter is "trustworthy", realize the measurement of the nonlinear waveform, and realize the linearity.
  • the standard traceability of the waveform Thereby, the measurement of the sine wave by the traditional standard table module is checked, and the measurement of the nonlinear wave is verified by the test table; whether the traditional standard meter module measures the sine wave and is standard traceable, so that it is easy Standard traceability for nonlinear wave measurements.
  • FIG. 1 is a circuit diagram of a non-linear load power and electric energy verification device according to an embodiment
  • FIG. 2 is a circuit diagram of a standard power source module of an embodiment
  • FIG. 3 is a circuit diagram of a non-linear load power and electric energy verification device according to another embodiment
  • FIG. 4 is a waveform diagram of a sinusoidal waveform, a current outputted by the first current output terminal, and a current outputted by the second current output terminal according to an embodiment
  • FIG. 5 is a circuit diagram of a non-linear load power and electric energy verification device according to still another embodiment
  • FIG. 6 is a circuit diagram of a non-linear load power and electric energy verification device according to still another embodiment
  • FIG. 7 is a circuit diagram of a non-linear load power and electric energy verification device according to still another embodiment
  • FIG. 8 is a circuit diagram of a non-linear load power and electric energy verification device according to still another embodiment
  • FIG. 9 is a waveform diagram of a first branch and a second branch after splitting by a nonlinear load power and power detecting device according to an embodiment.
  • a non-linear load power and power verification device 10 includes: a standard power source module 100, a conventional standard meter module 230, and a test circuit; the test circuit includes a first branch a second branch and a trunk, wherein the first branch and the second branch are connected to a first end of the standard power source module 100, and the first branch and the second branch are respectively Connected to the second end of the standard power source module 100 by the trunk, the standard mode module 230 working in the traditional mode is connected in series on the trunk; the standard power source module 100 is used to directly or indirectly
  • the first branch and the second branch respectively input a nonlinear waveform, wherein a non-linear waveform of the first branch and a nonlinear waveform of the second branch are superimposed to be a complete sinusoidal waveform
  • the first branch is used to serially connect the test table 210.
  • the nonlinear waveform is directly or indirectly input to the first branch and the second branch through the standard power source module, so that the test table serially connected to the first branch can measure the nonlinear waveform, and pass the dry road or the first
  • the measurement data of the standard meter modules on the branch are compared to achieve a "trustworthy" test of the non-linear energy meter.
  • the standard power source module directly inputs nonlinear waveforms to the first branch and the second branch, that is, the standard power source module outputs two nonlinear waveforms, and the standard power source module 300 can The output of two non-linear waveforms is realized by digital-to-analog conversion. As shown in FIG.
  • a standard power source module 300 including: a main control unit 110, a waveform generator unit 120, and a power amplifier unit 130;
  • the control unit 110 is connected to the waveform generator unit 120, and the waveform generator unit 120 is connected to the power amplifier unit 130;
  • the main control unit 110 is configured to generate three voltages and three currents according to the control instruction and Each phase current is split into two discrete digital signals, and the discrete digital signals are sent to the waveform generator unit 120, wherein the superposition of the waveforms corresponding to the two discrete digital signals of each phase current should Is a complete sinusoidal waveform;
  • the waveform generator unit 120 is configured to receive the discrete digital signal and convert the discrete digital signal into a pseudo signal outputting the analog signal to the power amplifier unit 130, wherein waveforms corresponding to two of the analog signals of each phase current are nonlinear waveforms, and two of the nonlinear waveform superpositions are equal to the sine
  • the power amplifier unit 130 is configured to amplify the analog signal and output through the
  • an output end of the main control unit 110 is connected to an input end of the waveform generator unit 120, and an output end of the waveform generator unit 120 is connected to an input end of the power amplifier unit 130.
  • the main control unit 110 is an FPGA (Field-Programmable Gate Array), and the main control unit 110 is configured to program three-phase voltage and three-phase according to the received control command.
  • the digital signal of current wherein the two digital signals of each phase current are discrete signals, or non-linear signals, and the two digital signals are superimposed and the corresponding values are continuous values, which are reflected as complete sine on the waveform.
  • Wave waveforms for example, two digital signals superimposed or combined are corresponding to a sine wave.
  • the waveform generator unit 120 is a DAC (Digital to Analog Converter) for converting the digital signals into corresponding analog signals, wherein the waveforms of the two analog signals of each phase current are superimposed.
  • the complete sinusoidal waveform, that is, the waveform corresponding to each analog signal is a non-linear waveform.
  • the waveform generator unit 120 outputs the digital signal to the power amplifier unit 130 according to the control instruction of the main control unit 110.
  • the main control unit 110 is configured to generate two discrete digital signals based on two durations according to a control instruction, wherein the durations of the two durations are equal, and the two discrete digital signals are combined. After that, a continuous digital signal is formed, that is, a complete digital signal corresponding to each phase current waveform.
  • the main control unit 110 is configured to generate two discrete digital signals based on the first duration and the second duration, and the waveform generator unit 120 converts the two discrete digital signals into two analog signals, respectively.
  • the first duration is equal to the second duration, that is, the length of time of the first duration is equal to the length of time of the second duration, and the first duration and the second duration are sequentially cycled, for example, two analog signals include An analog signal and a second analog signal, the first analog signal corresponding to the first duration, the second analog signal corresponding to the second duration, that is, the first analog signal is valid at the first duration, and the second analog signal is The value of the first analog signal corresponds to the value of the continuous digital signal; in the second duration, the value of the first analog signal is zero, and the value of the second analog signal is valid, at this time, The values of the two analog signals correspond to the values of the continuous digital signals; thus, the waveform areas corresponding to the first analog signal and the second analog signal are consecutive digital signals, respectively Complete one-half of the area, and the first analog signal and a second analog signal waveform corresponding to the phase current waveform superimposed on each successive was complete each phase current waveform corresponding to the digital signal.
  • the power amplifier unit 130 is configured to amplify the analog signal and output through the output end, that is, the power amplifier is configured to separately output a voltage and a current of the analog signal through an output end, that is, a power amplifier is used to pass
  • the output terminal outputs a sinusoidal voltage and a current of a non-linear waveform, wherein the current outputted from each output of the current is a current of a non-linear waveform, and the current of the nonlinear waveform outputted by the two output ends of each phase current is superimposed. For complete current per phase.
  • the main control unit generates a current signal according to the input control command, and divides the current of each phase sine wave waveform into two discrete digital signals, and converts the digital signal of each phase current of the waveform generator unit into a corresponding nonlinear waveform simulation.
  • the signal is output, so that the measurement of the non-linear waveform current can be performed by measuring the analog signal of one of the nonlinear waveforms through the test table; in addition, the main control unit can generate the current of the nonlinear waveform through the waveform generator unit.
  • the non-linear waveform of the first branch and the second branch can also be combined into the current of the sinusoidal waveform through the trunk road, thereby realizing the measurement of the sine wave by the standard table module working in the traditional mode.
  • the measurement of the wave is verified to be reliable; at the same time, since the traditional standard meter module measures the sine wave and is standard traceable, it is easy to achieve the standard traceability of the nonlinear wave measurement.
  • the standard power source module 100 divides the sinusoidal current waveform of each phase of the digital signal into two non-linear waveform digital signals by the main control unit, and converts the digital signal into a simulation through the waveform generator unit 120.
  • the current signal is output, so that the standard power source module 100 can output the current of the nonlinear waveform, or can synthesize the nonlinear waveform of the first branch and the second branch into the current of the sinusoidal waveform through the trunk, and at the same time
  • the standard table module for mode operation is traced by sine wave standard, which realizes the measurement of the sine wave waveform by the traditional standard table module.
  • the test table 210 compares the measurement of the nonlinear waveform, and verifies whether the nonlinear measurement is "trusted.”
  • the output currents of the two current outputs of the power amplifier unit 130 of the standard power source module 100 are I1a and I2a, and the output voltage of the voltage output terminal is Ua, and the digital signal corresponding to the current of the phase
  • the waveform is a sine wave, and the sine wave of the digital signal is divided into two non-linear waveforms at the same time interval, that is, the waveform corresponding to I1a and I2a, as shown in FIG. 4, the waveform corresponding to I1a corresponds to I2a.
  • the waveforms are superimposed, that is, the waveform Ia of the sine wave of the digital signal.
  • the two current output ends of the power amplifier unit 130 of the standard power source module 100 are a first current output end and a second current output end, respectively, and the first current output end and the second current output end are periodically outputted.
  • the first output is connected to the first branch, and the second output is connected to the second branch, and the first branch and the second branch are connected to the main control unit through the trunk.
  • the main control unit 110 is configured to generate two discrete digital signals based on the first duration t1 and the second duration t2, and the waveform generator unit 120 converts the two discrete digital signals into two analog signals, respectively.
  • the first duration t1 is equal to the second duration t2.
  • the value of the first current output terminal is valid, and the second current output terminal is not output.
  • the value and the value output by the first current output terminal are The value of the signal corresponds to; at the second duration t2, the first current output terminal does not output, and the value of the second current output terminal is valid.
  • the value output by the second stream output terminal corresponds to the value of the digital signal.
  • the standard table module 230 is a conventional standard table module 230.
  • the first current output terminal I1a is used to connect with the test table 210. That is, the first current output terminal I1a is connected to the first branch, and the test table 210 is connected in series on the first branch, and the first branch and the second branch pass the traditional standard meter module 230 on the trunk and the standard power source.
  • the common terminal Icom of the module is connected, through which the test circuit is connected to the main control unit 110, that is, the common terminal Icom is one end of the main control unit 110.
  • the standard power source module 100 forms a loop with the test table 210, the balanced impedance 220, and the conventional standard meter module 230.
  • the test table 210 is connected in parallel with the balanced impedance 220, and the test table 210 is connected in parallel with the balanced impedance 220 and the conventional standard meter module.
  • 230 is connected in series, the test table 210 measures the current of the nonlinear waveform of the first current output, and the conventional standard meter module 230 measures the combined current of the nonlinear waveform currents of the two branches in the trunk, and the synthesized current is the standard
  • the current of the sinusoidal waveform, that is, the conventional standard meter module 230 measures the "standard" current, that is, the current of the sinusoidal waveform.
  • the standard table module may be a separate standard table, and the standard table may be a traditional standard table for measuring a linear waveform, or a non-linear standard table for measuring a nonlinear waveform, the standard table
  • the module may also be implemented by analog sampling measurement.
  • the standard table module 230 of the verification device further includes an analog sampling unit 140 and a measurement calculation unit 150, the power amplifier unit 130.
  • the analog sampling unit 140 Connected to the analog sampling unit 140, the analog sampling unit 140 is connected to the measurement computing unit 150, the measurement computing unit 150 is connected to the main control unit 110; the analog sampling unit 140 is configured to The analog signal output by the power amplifier is sampled, and the analog signal obtained by sampling is converted into a digital signal, and the converted digital signal is sent to the measurement calculation unit 150; the measurement calculation unit 150 is used for Measuring the converted digital signal; the main control unit 110 is further configured to generate according to the control instruction The digital signal and the digital signal measured by the measurement calculation unit 150 are compared.
  • the analog sampling unit 140 is an ADC (Analog-to-Digital Converter), and the analog sampling unit 140 collects the analog signal output from the power amplifier unit 130 and converts it into a digital signal output to the measurement.
  • the calculation unit 150 is an FPGA; for example, the analog sampling unit 140 is configured to combine the two analog signals and convert the digital signals into a digital output signal to the measurement calculation unit 150, and the measurement calculation unit 150 is used for the simulation.
  • the unit combines the output digital signals for measurement, such that the main control unit 110 can compare the digital signals output by itself and the digital signals fed back by the measurement calculation unit 150.
  • the measurement calculation unit 150 also has the function of the standard table module 230, which can be used to provide standard delivery after standard traceability.
  • the standard power source module 100 further includes an input unit for receiving a control command, and transmitting the control command to the main control unit 110.
  • the input unit is a human-machine interaction unit 160 for the user to input a control instruction
  • the human-machine interaction unit 160 sends a control instruction to the main control unit 110
  • the human-machine interaction unit 160 is further configured to receive the main control unit.
  • Feedback of the comparison result of 110 for example, the human-machine interaction unit 160 further includes a display sub-unit for displaying the comparison result.
  • the waveform generator unit is configured to convert the three-phase digital signal into a three-phase analog signal, and wherein the signal of each phase current includes two of the analog signals and three-phase
  • the analog signal is output to the power amplifier unit, and two of the non-linear waveforms of each phase current are superimposed to be equal to one of the complete sinusoidal waveforms.
  • the power amplifier unit 130 has an output of three phases, wherein each phase current output includes two of the outputs, and two of the outputs of each phase are used to respectively output two of the same phase The analog signals.
  • the current of the waveform generator unit 120 has three-phase six-way output terminals, each phase current includes two output terminals, and two output terminals of each phase current are used to respectively output two complementary analog current signals.
  • the two outputs of each phase current are used to respectively output the divided two analog signals corresponding to one continuous current digital signal.
  • the power amplifier unit 130 has three-phase six-way current input terminals, each current input end of the power amplifier is correspondingly connected with each current output end of the waveform generator unit 120; and the power amplifier unit 130 has three Phase six current output terminals, each phase comprising two current output terminals, two output ends of each phase current for respectively outputting two amplified analog signals, such that three phases a, b of power amplifier unit 130
  • the currents of the analog signals respectively output by c and c are I1a, I2a, I1b, I2b, I1c, and I2c, and the voltages of the three phases a, b, and c of the power amplifier unit 130 are Ua, Ub, and Uc, respectively.
  • the power amplifier unit 130 is in the two of the outputs One for connecting the test table 210, one of the two outputs of the same phase of the power amplifier unit 130 is used to connect the test table 210, such that the analog sampling unit 140 and the measurement calculation unit 150 are paired with one phase.
  • the sine wave waveform is collected and measured, and the test table 210 measures the nonlinear waveform of the analog model outputted from one of the outputs of the phase, and detects whether the nonlinear waveform measured by the test table 210 is a sinusoidal waveform of the phase.
  • One-half of the test can detect that the accuracy of the test table 210 is "trustworthy".
  • the main control unit 110 generates a digital signal according to the input control command, and the complete current waveform corresponding to the digital signal by the waveform generator unit 120 is divided into two nonlinear waveform analog signal outputs. In this way, the measurement of the nonlinear waveform current can be realized by measuring the analog signal of one of the nonlinear waveforms by the test table 210.
  • the main control unit 110 can generate a current of a non-linear waveform through the waveform generator unit 120, and can also synthesize a non-linear waveform of the first branch and the second branch into a current of a sine wave waveform through a trunk. Thereby, the measurement of the sine wave waveform by the conventional standard table module is performed to verify whether the measurement of the nonlinear waveform by the test table 210 is credible.
  • the main control unit 110 is coupled to the waveform generator unit 120, and the waveform generator unit 120 is coupled to the power amplifier unit 130.
  • the waveform generator unit 120 has an output of a three-phase voltage and a three-phase six-way current, and each phase current includes two output terminals.
  • the power amplifier unit 130 has an input terminal of a three-phase voltage and a three-phase six-channel current, and each input end of the power amplifier is correspondingly connected to each output end of the waveform generator unit 120, and the power amplifier unit 130 has an output of a three-phase voltage and a three-phase six-way current, and an output of each phase current includes a first current output and a second current output.
  • the test circuit includes a test table 210, a conventional standard meter module 230, a balanced impedance 220, a first resistor R1 and a second resistor R2.
  • the first current output terminal is connected to the test table 210, and the second current output terminal is connected to the balanced impedance 220.
  • the first resistor R1 is connected in series with the test table 210, and the second resistor R2 is connected in series with the balanced impedance 220.
  • the first resistor R1 and the second resistor R2 are connected to the common terminal Icom of the standard power source module 100 through the conventional standard meter module 230.
  • the first current output terminal is connected to the branch of the test table 210 and the first resistor R1
  • the second current output terminal is connected to the branch where the balanced impedance 220 and the second resistor R2 are located, and the two branches are connected in parallel with the conventional standard.
  • the table modules 230 are connected in series, and the two branches are connected to the common terminal Icom of the standard power source module 100 through the conventional standard meter module 230, and form a current loop with the standard power source module 100.
  • the balanced impedance 220 also has the same impedance as the test table 210, so that the branch where the test table 210 is located and the branch where the balanced impedance 220 is located have the same impedance, so that the test table 210 is located in the branch and The current of the branch where the balanced impedance 220 is located is in the same circuit environment, reducing the measurement error due to the impedance difference.
  • the resistance value of the test table 210 is smaller than the resistance of the first resistor R1, for example, the resistance of the balanced impedance 220 is smaller than that of the first resistor R1. Resistance value.
  • the resistance of the test table 210 is less than one tenth of the resistance of the first resistor R1, or the resistance of the first resistor R1 is greater than ten times the resistance of the test table 210, and the balance impedance is 220.
  • the resistance value is less than one tenth of the resistance of the second resistor R2; or the resistance of the second resistor R2 is greater than ten times the resistance of the balanced impedance 220, due to the resistance of the first resistor R1 and the second resistor R2
  • the values are the same, and are respectively larger than the resistance value of the test table 210 and the resistance value of the balanced impedance 220. Therefore, the measurement error caused by the difference between the resistance value of the test table 210 and the resistance value of the balanced impedance 220 is reduced, so that the measurement is made. More accurate.
  • the test table 210 is used to measure the current of the nonlinear waveform outputted by the first output terminal
  • the standard table module 230 is a standard table module working in the traditional mode
  • the traditional standard table module 230 is used for measuring the trunk road.
  • the current that is, the resultant current flowing back to the standard power source module.
  • the traditional standard meter module is connected in series in the trunk road, so that the traditional standard meter module can measure the sine wave current, and the test table 210 can be detected by comparing the current of the test table 210 with the traditional standard meter module.
  • the accuracy, and the traditional standard table module 230 is standard traceable, such alignment results are "trustworthy.”
  • test table 210 and the traditional standard meter module 230 are also connected to the voltage output end of the standard power source module, and the voltage output terminal provides the voltage Ua of the standard power source module for the test table 210 and the conventional standard meter module.
  • test table in Figure 3 is A new type of standard table after a non-linear standard table module, which is a new standard table that has been verified to be "trustworthy" for its non-linear measurement.
  • the standard table module includes a non-linear standard table 230, that is, the standard table module includes a non-linear standard table, and the output of each phase current of the standard power source module 100 includes a first current output terminal I1a and a second current output terminal I2a, the first current output terminal I1a is connected to the first branch, the second current output terminal I2a is connected to the second branch, and the first branch and the second branch are both It is connected to the common terminal Icom of the standard power source module 100 through a trunk road.
  • the test table 210, the first resistor R1 and the non-linear standard table 230 are connected in series on the first branch, and the second resistor R2 and the balanced impedance 220 are connected in series on the second branch, that is, the first current output terminal is connected
  • the test table 210, the first resistor R1 and the branch of the nonlinear standard meter module 230, the second current output terminal is connected to the branch where the balanced impedance 220 and the second resistor R2 are located, and the two branches are connected in parallel with the standard power source module 100.
  • the common terminal Icom is connected to form a current loop with the standard power source module 100.
  • the non-linear working mode standard table module in this embodiment includes a non-linear standard table that operates in a non-linear working mode.
  • test table 210 and the nonlinear standard table 230 are detected by concatenating the nonlinear standard table 230 to the branch where the test table 210 is located. If the measurement results are equal, it is determined whether the test table 210 is "trustworthy". In this way, the traditional standard meter module does not need to be used again, making the measurement more convenient and straightforward.
  • the standard power source module indirectly inputs a nonlinear waveform to the first branch and the second branch, that is, the standard power source module outputs a complete sine wave and splits the sine wave into Two non-linear waveforms
  • the standard table module includes a conventional standard table 530, which operates in a conventional operation mode
  • the non-linear load power and power verification device further includes a first electronic switch and a second An electronic switch and a controller, the first electronic switch is serially connected to the first branch, the second electronic switch is serially connected to the second branch, and the controller is respectively connected to the first electronic switch The control terminal and the control terminal of the second electronic switch are connected. As shown in FIG.
  • a non-linear load power and energy verification device 10 comprising: a standard power source module 400, a first electronic switch 410, a second electronic switch 420, a controller 430, and a conventional standard.
  • the test circuit includes a first branch, a second branch, and a trunk, the first branch and the second branch being coupled to the first end of the standard power source module 400
  • the first branch and the second branch are respectively connected to the second end of the standard power source module 400 through the trunk, the first electronic switch 410 and the first branch,
  • the second electronic switch 420 is serially connected to the second branch, and the traditional standard meter 530 is serially connected to the trunk;
  • the controller 430 and the control end of the first electronic switch 410 and the The control end of the second electronic switch 420 is connected;
  • the controller 430 is configured to control only one of the first electronic switch 410 and the second electronic switch 420 to be turned on for any duration, the first branch is used
  • the serial connection test table 510 that is, the test list 510 is serially connected to the first On the road.
  • the standard power source module standard power source module standard power source module 400 is used to provide standard power of electrical energy.
  • the standard power source module 400 is used to output a linear waveform current.
  • the standard power source module 400 is used.
  • the sine wave current Isource is output.
  • the voltage output end of the standard power source module 400 is also connected to the test table 510 and the standard electric energy meter.
  • the standard power source module 400 provides the voltage of the standard voltage source for the test table 510 and the standard electric energy meter through the voltage output end. Vsource.
  • the test meter 510 is the tested electric energy meter
  • the traditional standard meter 530 is a standard electric energy meter, which may be a standard electric energy meter for measuring a linear waveform or a standard electric energy meter for measuring a non-linear waveform.
  • the conventional standard table 530 is a standard electric energy meter for measuring a linear waveform
  • the conventional standard table 530 is connected in series with the main road;
  • the standard meter module includes a standard electric energy meter for measuring a non-linear waveform, the standard table module is connected in series in the first branch, This will be further elaborated below.
  • the first branch and the second branch are connected in parallel, and the first branch and the second branch are both connected to the trunk.
  • the first electronic switch 410 When the first electronic switch 410 is turned on, the first branch is turned on, and the standard power source module 400 is passed.
  • the first branch and the trunk form a loop; the second electronic switch 420 is turned on, and the second branch is turned on, and the standard power source module 400 forms a loop through the second branch and the trunk.
  • the controller 430 controls only one of the first electronic switch 410 and the second electronic switch 420 to be turned on at any time, such that at any one time, the first branch and the second branch have one and only one guide. At any point in time when the non-linear load power and power verification device 10 is operating, the circuit can always be turned on.
  • the controller 430 is configured to respectively control the on and off of the first electronic switch 410 and the second electronic switch 420.
  • the controller 430 is configured to respectively control the duration of the first electronic switch 410 and the second electronic switch 420.
  • the controller 430 is configured to control only one of the first electronic switch 410 and the second electronic switch 420 to be turned on for any duration, ie, at any duration, the first electronic switch Only one of the 410 and the second electronic switch 420 is turned on.
  • the turn-on time of the first electronic switch 410 and the turn-on time of the second electronic switch 420 are offset from each other, for example, the first electronic switch 410 and the second electronic switch 420. Not open at the same time.
  • the standard power source module 400 inputs current to the first branch and the second branch respectively.
  • the first electronic switch 410 and the second electronic switch 420 are not turned on at the same time, for example, a non-linear load.
  • the power and energy verification device 10 includes two electronic switches, the first electronic switch 410 and the second electronic switch 420. At any one time, only one electronic switch is turned on, that is, at any duration or At any one time, the controller 430 controls one of the first electronic switch 410 and the second electronic switch 420 to be turned on, and controls the other of the first electronic switch 410 and the second electronic switch 420 to be turned off. The controller 430 sequentially turns on the first electronic switch 410 and the second electronic switch 420 for each on-off duration.
  • the on-off duration t includes a first duration t1 and a second duration t2, and the controller 430 is configured to
  • the first duration t1 controls the first electronic switch 410 to be turned on, controls the second electronic switch 420 to be turned off, and controls the first electronic switch 410 to be turned off at the second duration t2 to control the second electronic switch 420 to be turned on, wherein the first duration T1 is equal to the second duration t2, that is, the lengths of time of the first duration t1 and the second duration t2 are equal.
  • the first duration t1 and the second duration t2 are continuously cycled, so that the first electronic switch 410 and the second electronic switch 420 are continuously turned on and off, so that the current at the current input terminal is divided into different durations. For two.
  • the current of the linear waveform output by the standard power source module 400 is Isource.
  • the first electronic switch 410 is turned on, and the second electronic switch 420 is turned off, and flows through the first branch.
  • the current is I 1 and the current flowing through the second branch is 0; during the second duration t2, the second electronic switch 420 is turned on, the first electronic switch 410 is turned off, and the current flowing through the second branch is I 2 , the current The current through the first branch is zero.
  • Isource I 1 + I 2 , where the waveforms of I 1 and I 2 are respectively non-linear waveforms.
  • the current Isource input at the current input terminal is I ref
  • I ref is the current flowing through the trunk circuit
  • the waveform thereof is a sine wave
  • the waveform of the current has a duration of T
  • the first electron on-off switch 410 and a duration time t of the second electronic switch 420 is t
  • the duration control of the first electronic switch 410 and the second electronic switch 420 by the controller 430 causes the current of the sine wave to be split into nonlinear waveforms, such that the test table 510 connected in series on the first branch Measurement of nonlinear waveforms can be achieved.
  • the conventional standard table 530 is serially connected to the trunk.
  • the traditional standard table 530 is a conventional standard meter for measuring a linear waveform.
  • the first end of the standard power source module 400 is a current output end, and the first end of the standard power source module 400 is respectively connected to the first electronic switch.
  • the first end of the electronic switch 410 is connected to the first end of the second electronic switch 420, the second end of the first electronic switch 410 is connected to the test table 510, the test table 510 and the second electronic switch
  • the second end of the standard power source module 400 is connected to the second end of the standard power source module 400.
  • the second end of the standard power source module 400 is a common end Icom, which is connected in series on the first branch.
  • the test table 510 measures the nonlinear waveform
  • the conventional standard table 530 connected in series on the dry road can measure the linear waveform Isource, and compares the test table 510 on the first branch with the traditional standard table 530 on the trunk. Whether the measured current of the test table 510 is equal to one-half of the traditional standard table 530 can detect whether the accuracy of the test form 510 is "trustworthy".
  • the traditional standard table 530 can also achieve traceability of standard power.
  • the standard table module includes a non-linear standard table, as shown in FIG. 6, the non-linear standard table 530 is serially connected to the first branch, and the non-linear standard table 530 operates in a non-linear manner. jobs.
  • the nonlinear standard table 530 is a standard table for measuring a nonlinear waveform.
  • the first end of the standard power source module 400 is a current output end, and the first end of the standard power source module 400 is respectively associated with the first electronic
  • the first end of the switch 410 and the first end of the second electronic switch 420 are connected, the second end of the first electronic switch 410 is connected to the test table 510, and the test table 510 passes the nonlinear standard
  • the table 530 is coupled to the second end of the standard power source module 400, and the second end of the second electronic switch 420 is coupled to the second end of the standard power source module 400.
  • the test table 510 connected in series on the first branch measures the nonlinear waveform, and the nonlinear standard table 530 provides the measurement standard of the nonlinear waveform by comparing the measurement results of the test table 510 with the nonlinear standard table 530. , it can be detected whether the accuracy of the test table 510 is "trustworthy".
  • the non-linear load power and power verification device 10 further includes a current detection module 460, the current detection module 460 is serially connected to the dry circuit, and the current detection Module 460 is coupled to controller 430.
  • One end of the current detecting module 460 is connected to the first end of the standard power source module 400, and the other end of the current detecting module 460 is connected to the first electronic switch 410 and the second electronic switch 420, that is, the standard power source module. 400 is connected to the first branch and the second branch through the current detecting module 460.
  • the current detecting module 460 is connected in series in the trunk circuit, and the current detecting module 460 is connected to the controller 430.
  • the current detecting module 460 is configured to detect the standard power source.
  • the current input by the module 400 that is, the current detecting module 460 is used to detect the current at the current input terminal, the current detecting module 460 is configured to provide the controller 430 with a zero-crossing detection signal, and the controller 430 is further configured to receive After the zero-crossing detection signal, the duration of the first electronic switch 410 or the second electronic switch 420 is synchronously turned on, that is, when the current detecting module 460 detects the zero-crossing of the current input, the controller 430 starts.
  • module 400 Performing continuous on/off control of the first electronic switch 410 and the second electronic switch 420, thereby causing splitting operation of the waveform and a standard power source
  • the current inputs of module 400 are synchronized such that the non-linear waveform after each duration of the split can be matched to the waveform of standard power source module 400.
  • the controller 430 is a control chip, for example, the controller 430 is a single chip microcomputer.
  • the first electronic switch 410 and the second electronic switch 420 are respectively semiconductor device switches.
  • the first electronic switch 410 is one of a MOS transistor, an IGBT, and a triode
  • the second electronic switch is one of a 420 MOS transistor, an IGBT, and a triode.
  • the first electronic switch 410 is a MOS (metal oxide semiconductor) field effect transistor, and the first electronic switch 410 includes two MOS transistors, the second The electronic switch 420 is a MOS tube, and the second electronic switch 420 includes two MOS tubes, so that for the sinusoidal current of the alternating current, the two MOS tubes of the first electronic switch 410 can be turned on and off in two directions.
  • the two MOS transistors of the second electronic switch 420 can be turned on and off in two directions, so that the turn-off of the conduction in the positive and negative half-waves can be realized.
  • the MOS transistor is a PMOS transistor, for example, the The MOS transistor is an NMOS transistor.
  • the control end of the first electronic switch 410 is the gate of the first electronic switch 410
  • the control end of the second electronic switch 420 is the gate of the second electronic switch 420
  • the first of the first electronic switch 410 The terminal may be a source or a drain
  • the first end of the second electronic switch 420 may be a source or a drain
  • the controller 430 inputs a signal to the gate of the first electronic switch 410, so that the first An electronic switch 410 is turned on to input a signal to the gate of the second electronic switch 420 such that the first electronic switch 410 is turned on.
  • the MOS transistor has a very fast switching speed, enabling the controller 430 to quickly control the on and off of the first branch and the second branch, further improving the switching efficiency of the current, and enabling the on-off maintenance time to be shorter. In order to make the switching frequency higher, the accuracy of the nonlinear waveform current is higher. It should be understood that the connection between the two MOS tubes of the first electronic switch 410 and the two MOS tubes of the second electronic switch can be set according to actual needs, and those skilled in the art can realize the connection of two MOS tubes according to the prior art. And to achieve conduction and deactivation in both directions, which is not cumbersome in this embodiment.
  • the first electronic switch is an IGBT (Insulated Gate Bipolar Transistor), and the first electronic switch includes two IGBTs.
  • the second electronic switch is The IGBT, the second electronic switch comprises two IGBTs, the two IGBTs of the first electronic switch and the two IGBTs of the second electronic switch can also achieve conduction and closing respectively on the positive and negative half waves of the sine wave.
  • the control end of the first electronic switch 410 is the gate of the first electronic switch 410, and the first end of the first electronic switch 410 may be a drain or a source, and the second electronic The control terminal is a gate of the second electronic switch 420, and the first end of the second electronic switch 420 can be a drain or a source, so that the controller 430 is directed to the gate of the first electronic switch 410 and The gate input signal of the second electronic switch 420 can realize the control of the on and off of the first electronic switch 410 and the second electronic switch 420.
  • the first electronic switch 410 is a triode
  • the first electronic switch 410 includes two triodes
  • the second electronic switch 420 is a triode
  • the second electronic switch 420 includes two triodes.
  • the control end of the first electronic switch 410 is the base of the first electronic switch 410
  • the first end of the first electronic switch 410 may be a collector or an emitter
  • the second electronic switch 420 controls
  • the terminal is the base of the second electronic switch 420
  • the first end of the second electronic switch 420 may be a collector or an emitter, such that the controller 430 is directed to the base of the first electronic switch 410 and the second electron
  • the base input signal of the switch 420 can realize the control of the on and off of the first electronic switch 410 and the second electronic switch 420.
  • the non-linear load power and power verification device 10 further includes a first resistor and a second resistor, the first resistor is serially connected to the first branch, and the second resistor is connected in series The second road.
  • the first electronic switch 410 is connected in series with the first resistor R1
  • the second electronic switch 420 is connected in series with the second resistor R2
  • the first electronic switch 410 and the first resistor R1 are located in the line.
  • the second electronic switch 420 and the second resistor R2 are in the first branch, so that when the controller 430 controls the first electronic switch 410 to be turned on and the second electronic switch 420 is turned off, the first When the branch circuit is turned on, the current at the current input terminal is sent from the first branch to the current output terminal.
  • the controller 430 controls the second electronic switch 420 to be turned on to control the first electronic switch 410 to be turned off
  • the second branch is turned on, and the current is turned on. The current at the input is delivered from the second branch to the current output.
  • the resistance of the first resistor R1 and the resistance of the second resistor R2 are the same, such that the first branch and the second branch Having the same resistance value, so that the current of the current input terminal can be quickly switched in the first branch and the second branch, and the current of the first branch and the second branch is more accurate, that is, the first branch
  • the currents of the road and the second branch are respectively one-half of the current at the current input.
  • the non-linear load power and power verification device 10 further includes a balanced impedance 520 that is connected in series In the second branch, the balance impedance 520 is connected in series with the second electronic switch 420, that is, the balanced impedance 520 is connected in series to the second branch where the second electronic switch 420 and the second resistor R2 are located.
  • the balanced impedance 520 has the same impedance as the test table 510, so that the first branch and the second branch can have the same impedance, and the current at the current input can be realized in the first branch and the second branch.
  • the fast switching and the first branch and the second branch current are more accurate, that is, the currents of the first branch and the second branch are respectively one-half of the current at the current input end.
  • the resistance value of the test table 510 is smaller than the resistance of the first resistor R1, for example, the resistance of the balanced impedance 520 is smaller than that of the first resistor R2.
  • the resistance value that is, the resistance value of the test table 510 is less than one tenth of the resistance value of the first resistor R1, or the resistance value of the first resistor R1 is greater than ten times the resistance value of the test meter 510.
  • the resistance of the balanced impedance 520 is less than one tenth of the resistance of the second resistor R2, or the resistance of the second resistor R2 is greater than the resistance of the balanced impedance 520 of ten times.
  • the standard power source module inputs nonlinear waveforms directly to the first branch and the second branch, respectively, that is, the standard power source module outputs two non-linear waveforms, in one embodiment, such as As shown in FIG. 7, a non-linear load power and power verification device 10 is provided, including: a standard power source module 400, a conventional standard meter 530, and a test circuit; the test circuit includes a first branch, a second branch, and a dry
  • the standard power source module 400 includes a power output unit 440, a first electronic switch 410, a second electronic switch 420, and a controller 430. The first end of the power output unit 440 passes through the first electronic switch 410.
  • the first branch is connected, the first end of the power output unit 440 is connected to the second branch through the second electronic switch 420, and the first branch and the second branch respectively pass
  • the trunk is connected to the second end of the power output unit 440, the traditional standard table 530 is connected in series on the trunk; the controller 430 is respectively connected to the control end of the first electronic switch 410.
  • Second electronic opening The control terminal of the gateway 420 is connected; the controller 430 is configured to control only one of the first electronic switch 410 and the second electronic switch 420 to be turned on for any duration.
  • the first branch is used to serially connect the test list 510, that is, the test list 510 is connected in series on the first branch.
  • the standard power source module 400 provides two outputs of nonlinear current, that is, the standard power source module 400 realizes two nonlinear currents through the first electronic switch 410, the second electronic switch 420, and the controller 430.
  • the output is interrupted by the duration of the first electronic switch 410 and the second electronic switch 420 to achieve a two-way non-linear waveform current output.
  • the first end of the power output unit 440 is respectively connected to the first end of the first electronic switch 410 and the first end of the second electronic switch 420, and the second end of the first electronic switch 410 is the first current.
  • the output end, the second end of the second electronic switch 420 is a second current output end, the first current output end is connected to the first branch, the second current output end is connected to the second branch, and the first branch is connected
  • the first resistor R1 is connected
  • the second resistor R2 is connected in series on the second branch
  • the balance impedance 520 is also connected in series on the second branch.
  • the second end of the power output unit 440 is the common terminal Icom.
  • the current of the linear waveform output by the power output unit 440 is I ref
  • the first electronic switch 410 is turned on
  • the second electronic switch 420 is turned off
  • the first current output is turned on at the first duration.
  • the output current is Isource 1
  • the current outputted by the second current output is 0
  • the second electronic switch 420 is turned on
  • the first electronic switch 410 is turned off
  • the current outputted by the second current output is Isource 2
  • a current output has an output current of zero.
  • I ref Isource 1 +Isource 2 , where the waveforms of Isource 1 and Isource 2 are nonlinear waveforms, respectively.
  • the duration control of the first electronic switch 410 and the second electronic switch 420 by the controller 430 causes the current of the sine wave to be split into nonlinear waveforms, so that the standard power source module 400 can provide two nonlinear waveforms.
  • the current output is such that the test meter 510 connected in series on the first branch enables measurement of the non-linear waveform.
  • the power output unit 440 is a non-linear load standard power output unit 440, and the power output unit 440 is used to supply power of standard power.
  • the power output unit 440 is used to output a current of a linear waveform, for example, a power output unit.
  • 440 is used to output a sine wave current Isource.
  • the voltage output terminal of the power output unit 440 is further connected to the test table 510 and the standard electric energy meter.
  • the power output unit 440 provides the voltage Vsource of the standard voltage source for the test table 510 and the standard electric energy meter through the voltage output terminal.
  • the standard table module includes a conventional standard table 530 serially connected to the trunk circuit.
  • the conventional standard table 530 operates in a conventional operation mode, and the power output unit 440
  • the first end of the first electronic switch 410 is connected to the first end of the second electronic switch 410, and the second end of the first electronic switch 410 is connected to the test table 510.
  • the test table 510 and the second end of the second electronic switch 420 are both connected to the second end of the power output unit 440 through the conventional standard table 530.
  • the traditional standard table 530 is a linear conventional standard table 530 for detecting a linear sine wave current, so that the conventional standard table 530 can measure the sine wave current output by the standard power source module 400, and the subject is tested.
  • the table 510 is compared with the current of the conventional standard table 530. If the current of the test table 510 is one-half of the standard electric energy meter, the accuracy of the test table 510 can be detected, and the standard power is realized. Traceability.
  • the standard table module includes a non-linear standard table 530 in series with the first branch, the non-linear standard table 530 operating in a non-linear manner, standard
  • the first end of the power source module 400 is a current output end, and the first end of the standard power source module 400 is respectively connected to the first end of the first electronic switch 410 and the first end of the second electronic switch 420.
  • the second end of the first electronic switch 410 is connected to the test table 510, and the test table 510 is connected to the second end of the standard power source module 400 through the nonlinear standard table 530, the second electronic A second end of the switch 420 is coupled to the second end of the standard power source module 400.
  • the sex standard table module is a non-linear standard table 530, which is used to provide a standard for non-linear waveform detection, so that whether the current detected by the test table 510 and the standard electric energy meter is equal, that is, The accuracy of the detection of the test table 510 can be detected.
  • the standard electric energy meter can provide a standard for non-linear waveform detection, thereby eliminating the need for a series standard electric energy meter in the main road, the first branch can be used. The detection of the test table 510 is implemented.
  • the current loop of the test circuit is connected according to the method shown in FIG. 5.
  • the device controls the electronic switches A and B through the controller, and divides the measurement current into two parts, which are respectively sent to the test instrument and the balance circuit.
  • the test waveform is shown in Fig. 5.
  • the current flowing through the instrument under test is the waveform of the electronic switch A.
  • the current flowing through the balanced impedance is the waveform of the electronic switch B.
  • the standard flow on the standard meter module is the synthesis of the two. When the error of the controller's switching control of the electronic switch is of a negligible magnitude, the current flowing through the standard meter module can be considered to be a complete sine wave.
  • Figure 9 depicts the current waveform applied during the experiment.
  • the time T is the duration of the sine wave
  • t is the on-off duration of the electronic switch
  • the magnitude of the control t can control the frequency characteristics of the nonlinear waveform required by the test.
  • the control principle of the electronic switch is that there is only one electronic switch in the on state at any time, and the current flowing through the standard meter module is the sum of the currents flowing by the two electronic switches.
  • the rms value of the typical control two currents is 1/2 of the standard meter module. Calculating the difference between the current of the test instrument and the current of the standard meter module can be used to obtain the measurement error of the test instrument.
  • the non-linear load power and electric energy verification device shown in FIG. 5 to FIG. 8 is characterized in that the sine wave current is divided into two parts of a higher frequency, and the frequency of the division can be changed to change the power of the nonlinear working condition/ The non-linearity of the energy measurement test waveform.
  • the present invention proposes to construct a non-linear load power and electric energy verification device based on FIG.
  • the device can be used to verify the energy metering characteristics of the non-linear load conditions of the electric energy meter or device, without using the original test standard power source module and standard meter module. Transformation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

La présente invention concerne un dispositif d'étalonnage de puissance de charge non linéaire et d'énergie électrique, comprenant un module de source d'alimentation standard, un module de compteur standard et une boucle d'essai. La boucle d'essai comprend une première branche, une deuxième branche et un circuit primaire. La première branche et la deuxième branche sont connectées à une première extrémité du module de source d'alimentation standard. La première branche et la deuxième branche sont connectées à une deuxième extrémité du module de source d'alimentation standard au moyen du circuit primaire. Le module de compteur standard est connecté en série sur la première branche ou le circuit primaire. Le module de source d'alimentation standard est utilisé pour introduire respectivement des formes d'onde non linéaires dans la première branche et la deuxième branche. La première branche est configurée pour être connectée en série à un compteur testé. Les formes d'onde non linéaires sont respectivement introduites dans la première branche et la deuxième branche au moyen du module de source d'alimentation standard, le compteur testé connecté en série sur la première branche est activé pour mesurer les formes d'onde non linéaires, les formes d'onde non linéaires peuvent être comparées à des données de mesure du module de compteur standard sur le circuit primaire ou la première branche, le fait qu'un compteur d'énergie électrique non linéaire est crédible peut être testé, un module de compteur standard conventionnel mesure l'onde sinusoïdale avec une traçabilité standard et, par conséquent, une traçabilité standard pour une mesure d'onde non linéaire peut être réalisée.
PCT/CN2018/104725 2017-10-16 2018-09-08 Dispositif d'étalonnage de puissance de charge non linéaire et d'énergie électrique Ceased WO2019076165A1 (fr)

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CN108051622A (zh) * 2017-10-16 2018-05-18 广东东方电讯科技有限公司 波形分裂装置
CN207502618U (zh) * 2017-10-16 2018-06-15 广东东方电讯科技有限公司 非线性负荷功率输出装置
CN207502572U (zh) * 2017-10-16 2018-06-15 广东东方电讯科技有限公司 波形分裂装置
CN207502707U (zh) * 2017-10-16 2018-06-15 广东东方电讯科技有限公司 非线性负荷功率与电能检定装置

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CN111638485A (zh) * 2020-06-09 2020-09-08 国网陕西省电力公司电力科学研究院 一种基于标准脉冲虚功率源法的直流电能表校准方法及系统
CN111638485B (zh) * 2020-06-09 2022-04-26 国网陕西省电力公司电力科学研究院 一种基于标准脉冲虚功率源法的直流电能表校准方法及系统

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