EP2719049A2 - Dispositif de commande d'électricité pour une installation électrique d'un bâtiment et procédé de commande d'électricité d'une installation électrique d'un bâtiment - Google Patents

Dispositif de commande d'électricité pour une installation électrique d'un bâtiment et procédé de commande d'électricité d'une installation électrique d'un bâtiment

Info

Publication number
EP2719049A2
EP2719049A2 EP12707940.8A EP12707940A EP2719049A2 EP 2719049 A2 EP2719049 A2 EP 2719049A2 EP 12707940 A EP12707940 A EP 12707940A EP 2719049 A2 EP2719049 A2 EP 2719049A2
Authority
EP
European Patent Office
Prior art keywords
power
energy
unit
storage unit
energy storage
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.)
Withdrawn
Application number
EP12707940.8A
Other languages
German (de)
English (en)
Inventor
Anne Pieter HAYTEMA
Bram VANOORT
Rochus Gerhardus Hermanus WIEGGERS
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.)
Nederlandsche Apparatenfabriek NEDAP NV
Original Assignee
Nederlandsche Apparatenfabriek NEDAP NV
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 Nederlandsche Apparatenfabriek NEDAP NV filed Critical Nederlandsche Apparatenfabriek NEDAP NV
Publication of EP2719049A2 publication Critical patent/EP2719049A2/fr
Withdrawn legal-status Critical Current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
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in networks by storage of energy
    • H02J3/32—Arrangements for balancing of the load in networks by storage of energy using batteries or super capacitors with converting means
    • 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
    • H02J2105/00—Networks for supplying or distributing electric power characterised by their spatial reach or by the load
    • H02J2105/40—Networks for supplying or distributing electric power characterised by their spatial reach or by the load characterised by the loads connecting to the networks or being supplied by the networks
    • H02J2105/42—Home appliances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/242—Home appliances

Definitions

  • the invention generally relates to a power control device for an electrical installation of a building, such as a home or a commercial building, which obtains energy or power from both at least one power generation unit, such as a solar, wind or other fuel-less power source, and via a power grid connection unit another power source, typically a utility power grid.
  • a power control device for an electrical installation of a building, such as a home or a commercial building, which obtains energy or power from both at least one power generation unit, such as a solar, wind or other fuel-less power source, and via a power grid connection unit another power source, typically a utility power grid.
  • Such power control devices for example ones that supply electrical energy to a household, as consumer unit (or "load unit"), are well known.
  • the power generation unit such as a photovoltaic system generates a substantial amount of energy, for example when weather conditions are good, the household is supplied with sufficient electrical energy.
  • the photovoltaic system generates less energy than the household consumes, for example at night or when weather conditions are poor, the household needs to cover its energy requirements from the (public) power grid.
  • the power control device has a grid connection unit by means of which the power control device may be connected to the power grid in order to draw this energy. This connection also permits the power control device to release energy that it generates to the power grid when the photovoltaic system generates more energy than is consumed by the household.
  • the disadvantage of such a power control device is that during a period wherein the power generation unit generates more energy than required by the load the surplus energy is fed into the grid (for which only a low tariff will be paid in return by an operator of the grid) while during a period wherein the power generation unit generates less energy than required by the load energy is drawn from the grid.
  • At least one of these objects or at least part of one of these objects is achieved by providing a power control device according to claim 1.
  • the current sensor electromagnetically coupled to the electrical conductor without direct electrical connection to the electrical conductor, the current sensor can in a simple way be used as part of a retrofit procedure with, for example, existing utility grid-connected solar power installations. Also the current sensor can in a simple way be used as part of a procedure with new utility grid-connected solar power installations.
  • the current sensor can in a simple way be used as part of a procedure with new utility grid-connected solar power installations.
  • the optional energy storage unit can be used for storing energy and for supplying energy if the optional energy storage unit is present, the problem about the above referred to economical disadvantage may be solved.
  • a power control device which is simple in construction can be obtained when the at least one power generation unit is connected via the power management unit to the power meter if the power meter is present and wherein the optional energy storage unit is connected via the power
  • a power control device which is simple in construction can be obtained when the at least one power generation unit is connected via the power management unit to the junction if the optional power meter is not present and wherein the optional energy storage unit is connected via the power management unit to the junction if the optional energy storage unit is present and the optional power meter is not present.
  • An optimized supply of energy that matches requirements of the electrical installation using as less as possible energy from the power grid can be provided in an embodiment of a power control device according to the invention, wherein the power management unit is adapted for controlling the energy flow between the at least one power generation unit, the energy storage unit, the electrical load connector and/or the power grid connection unit such as to try to regulate the electrical current through the electrical conductor to zero.
  • the power grid connection unit regulates the electrical current through the electrical conductor towards zero and if possible to zero. It is noted that if in this application the energy flow from the power generation unit connector is mentioned this means, the energy flow of the power generation unit which is, in use, connected to the power generation unit connector.
  • the energy flow supplied by the at least one power generation unit (or power generation unit connector) is larger than the demand of the load and the required charging capacity of the energy storage unit is less than the surplus of energy flow generated by the at least one power generation unit (or power generation unit connector) which is not supplied to the load. Then the portion of the surplus of energy flow which can not be stored in the energy storage unit is supplied to the power grid because said current is regulated towards zero. In fact in that case said current will not become zero but as small as possible. If the energy flow supplied by the at least one power generation unit (or power generation unit connector) is smaller than the demand of the load the shortage of energy flow is supplied by the energy storage unit if available (and no energy flow is drawn from the power grid) because said current is regulated towards zero.
  • said current is zero. If the energy flow supplied by the at least one power generation unit (or power generation unit connector) is smaller than the demand of the load and if the energy storage unit can only supply a portion of the energy flow which is additionally needed by the load or the energy storage unit is empty, than the shortage of energy flow is drawn from the power grid. In that case said current is not zero, but because the power generation unit tries to regulate the current to zero the energy drawn from the power grid is as small as possible.
  • the power management unit is adapted for controlling the energy flow between the at least one power generation unit, the energy storage unit and the electrical load connector such that the amount of energy drawn by the at least one electrical load is supplied solely by the combination of the at least one power generation unit and the energy storage unit. In this way it is possible to provide energy to the at least one electrical load independent from the power grid in an efficient and a cheap way.
  • the power management unit is adapted for controlling the energy flow between the at least one power generation unit, the energy storage unit, the electrical load connector and/or the power grid connection unit such that the electrical current through the electrical conductor is regulated to zero
  • the power management unit is adapted for controlling the energy flow between the at least one power generation unit, the energy storage unit, the electrical load connector and/or the power grid connection unit such that a surplus of energy supplied by the at least one power generation unit with respect to the amount of energy drawn by the at least one electrical load is stored in the energy storage unit or a shortage of energy supplied by the at least one power generation unit with respect to the amount of energy drawn by the at least one electrical load is drawn from the energy storage unit.
  • amounts of energy provided internally by the at least one power generation unit and the energy storage unit), which amounts are sufficient to cover the demand by the at least electrical load and are kept in balance by storing or drawing energy from the energy storage unit.
  • the power management unit will regulate this current as close as possible to zero, so that all the energy supplied by the at least one power generation unit and the energy storage unit is first used to cover the demand by the at least one electrical load and the remainder is drawn from the power grid via the power grid connection unit.
  • the power management unit is adapted for controlling the energy flow between the at least one power generation unit, the energy storage unit, the electrical load connector and/or the power grid connection unit such that the electrical current through the electrical conductor is regulated as close as possible to zero, and for controlling the energy flow between the at least one power generation unit, the energy storage unit, the power grid connection unit and the electrical load connector such that a shortage of energy supplied by the combination of the at least one power generation unit and the energy storage unit with respect to the amount of energy drawn by the at least one electrical load is drawn from the power grid connection unit.
  • the current sensor is coupled to the electrical conductor during a retrofit operation it is advantageous to use an embodiment of the power control device according to the invention, wherein the power management unit is adapted for controlling an initial energy flow between the power grid connection unit and the electrical load connector when the current sensor is electromagnetically coupled to the electrical conductor for providing an indication of the current direction and/or value of the electrical current through the electrical conductor.
  • the power management unit is adapted for controlling an initial energy flow between the power grid connection unit and the electrical load connector when the current sensor is electromagnetically coupled to the electrical conductor for providing an indication of the current direction and/or value of the electrical current through the electrical conductor.
  • the power control is adapted for determining the amount of power submitted to the power grid via the power grid connection unit and lowering the amount of power supplied, in use, by the at least one power generation unit to the at least one power generation unit connector if the amount of power submitted to the power grid exceeds a predetermined value.
  • the power control device may, but need not, be provided with the optional energy storage unit.
  • the invention further relates to a method of power controlling an electrical installation of a building, the method using a power control device, comprising:
  • At least one power generation unit for generating energy from renewable sources
  • an optional energy storage unit for storing energy and for supplying stored energy
  • an optional power meter for measuring the energy being supplied by the at least one power generation unit and the energy being supplied by the optional energy storage unit if this unit is present;
  • an electrical load connector for connection to at least one electrical load of the electrical installation
  • a power grid connection unit for connecting the electrical load connector to a power grid, for drawing energy from the power grid and for feeding energy into the power grid;
  • a main meter for measuring the amount of energy drawn from the power grid and fed into the power grid
  • the electrical load connector being connectable to the power grid connection unit through a junction, the power grid connection unit being connected to the junction by an electrical conductor;
  • the at least one power generation unit and the optional energy storage unit if this unit is present being connected to the junction wherein the at least one power generation unit and the optional energy storage unit if this unit is present being connected via the power meter to the junction if the power meter is present;
  • the method comprises the step of receiving by a power management unit connected to the current sensor the current sensor signal created by the current sensor, and the step of controlling by the power management unit the energy flow between the power generation unit, the optional energy storage unit if this unit is present, the electrical load connector and/or the power grid connection unit at least based on the current sensor signal.
  • the method further comprises the step of adapting the power management unit such that it controls the energy flow between the at least one power generation unit, the optional energy storage unit if this unit is present, the electrical load connector and/or the power grid connection unit such as to try to regulate the electrical current through the electrical conductor to zero.
  • Fig. 1 is a schematic diagram illustrating a power control device for an electrical installation of a building in accordance with the invention.
  • FIG. 1 illustrates a simplified block diagram of a power control device 1 including at least one power generation unit, such as a solar panel 2 and a windmill 3.
  • a windmill and a solar panel i.e. a photovoltaic system
  • the invention is not limited to power generation units generating energy by solar power or by wind energy, but such a unit can generate power equally well from biogas, geothermal energy or other renewable resources.
  • An energy storage unit 4 is present for storing electric energy and for providing electric energy.
  • Such an energy storage unit 4 may for example be formed by one or more supercaps, Li-ion batteries or any other energy storage means.
  • At least one electrical load 5 of an electrical installation of a building is connected via an electrical load connector 6 to a junction 7.
  • Such an electrical load 5 may be formed by any or all electrical appliances which can be present in a household or a commercial building.
  • An AC power grid or utility grid 8 (not belonging to the power control device 1) is connected to a power grid connection unit 9 by a line 10. In this way energy can be drawn from or fed into the power grid 8.
  • a main or electric consumption meter 11 is connected to the power grid connection unit 9 by a line 12 and measures the amount of energy drawn from and fed into the power grid 8.
  • the main meter may be arranged for measuring the amount of energy drawn from the power grid and for measuring the amount of energy fed into the power grid. However in this example the main meter is arranged for measuring the amount of energy drawn from the power grid minus the amount of energy fed into the power grid, thus a net amount of energy is measured which is supplied to the power grid or drawn form the power grid.
  • Electrical energy from the power grid 8 is supplied to the at least one electrical load 5 via the grid connection unit 9, the main meter 11 and the junction 7 and passes through an electrical conductor 13.
  • a current sensor 14 is positioned along electrical conductor 13 between junction 7 and the main meter 11 and is electromagnetically coupled to electrical conductor 13 without direct electrical connection to the electrical conductor 13.
  • the current sensor 14 can, in one example, be a differential noncontact current sensor, such as a Rogowski coil having an open interior or AC Current transformers TT 100-SD or TT 50-SD from LEM.
  • the current sensor 14 is a clip-on current sensor using magnetic inductivity to measure the direction of the AC current (and optionally the value of the current) flowing within the electrical conductor 13.
  • Such clip-on sensors are known per se. Using this type of non-contact current sensor provides several advantages.
  • the current sensor can be simply clipped on the electrical conductor without disturbing the conductor.
  • Other types of non-contact current sensors such as other differential sensors or proportional sensors, including magnetic field current sensors, current transformers, and Hall effect sensors, can also be used in different scenarios
  • the current sensor 14 creates a current sensor signal representative of at least the direction of the current flowing through the electrical conductor 13 and, optionally after calibration, a signal
  • the inventive power control device 1 also includes a power management unit 15 comprising a microprocessor or any other suitable control means 16 which is connected to the current sensor 14 by a current sensor signal line 17, which signal line 17 transports the current sensor signal from the current sensor 14 to the control means 16.
  • the power management unit 15 further comprises a bus 18 and a plurality of modules 19, 20, 21, 22 which are detachably connected with the bus 18 for mutually exchanging electrical energy between the modules via the bus 18.
  • Each module 21; 22 has a first connection 23; 24 which is, as shown in this example, operatively electrically connected with the bus 18 for supplying energy to the bus 18.
  • Each module 21; 22 is further provided with a second connection 25; 26 which is operatively connected with the solar panel 2 and the windmill 3 via power generation unit connectors 50, 52 respectively, for drawing energy from the respective power generation unit via the second connection.
  • the module 20 of the power management unit 15 is provided with a first connection 27 which is, as shown in this example, operatively electrically connected with the bus 18 and a second connection 28 which is operatively electrically connected with the energy storage unit 4 for, as desired, supplying energy to the bus via the first connection 27 and drawing energy from the energy storage unit 4 via the second connection 28 or drawing energy from the bus via the first connection 27 and supplying energy to the energy storage unit 4 via the second connection 28.
  • the module 19 of the power management unit 15 is provided with a first connection 29 which is, as shown in this example, operatively electrically connected with the bus 18 and a second connection 30 which is operatively electrically connected with the junction 7 via a power meter 31 for, as desired, drawing energy from the bus 18 via the first connection 29 and supplying energy to the at least one electrical load 5 via the second connection 30, the power meter 31 and the junction 7 and/or drawing energy from the power grid 8 and supplying energy to the at least one electrical load 5 via the power grid connection unit 9, the main meter 11 and the junction 7.
  • the power meter 31 measures the amount of energy which is supplied from unit 19 towards the junction 7.
  • the voltage on the bus is a DC voltage wherein the module 19 transforms a DC current from the bus into an AC current through the power meter 31 and vice versa.
  • the current supplied to the connections 25, 26, 28 is however in this example a DC current.
  • the power meter is optional and may be deleted. In that case in the example the unit 14 is directly connected to the junction 7. Also in that case in the example the power management unit 15 is directly connected to the junction 7.
  • the power meter 31 is in that case in the example replaced by a direct connection via a wire.
  • control means 16 generates control signals on a line 32 connecting the control means 16 with each of the modules 19, 20, 21, 22 for respective control, such as activation or deactivation, of the modules.
  • each module 19; 20; 21; 22 is further provided with a local control unit 33; 34; 35; 36 which is connected to the control means 16.
  • the power management unit 15 is adapted for controlling the energy flow between the at least one power generation unit 2, 3, the energy storage unit 4, the at least one electrical load 5 and the power grid connection unit 9 with the help of the control means 16, the local control units 33, 34, 35, 36 and at least based on the current sensor signal created by the current sensor 14.
  • the power management unit 15 controls the energy flows based on the current sensor signal such as to try to regulate the electrical current through the electrical conductor 13 to zero.
  • the power management unit 15 tries to control the energy flows such that the electrical current drawn from the power grid is low as possible, preferably zero.
  • the power management unit 15 is able to control the energy flows such that the current through the electrical conductor 13 is exactly zero.
  • the power management unit 15 controls the energy flows such that first the energy supplied by the power generation units 2, 3 is used to cover the demands of the at least one electrical load 5. If the power generation units 2, 3 produce more energy than the energy drawn by the at least one load 5, the surplus energy is supplied to or stored in the energy storage unit 4.
  • the power management unit 15 feeds the portion of the surplus of energy flow which can not be loaded into the energy storage unit 4 into the power grid. Than said current is not zero although it is tried by the power management unit to regulate said current to zero. If the power generation units 2, 3 produce not enough energy with respect to the energy drawn by the at least one load 5, the control of the power management unit 15 is such that the remaining energy is drawn from the energy storage unit 4 (than said current is not zero although it is tried by the power management unit to regulate said current to zero).
  • the power management unit 15 controls the energy flows such that first the internal energy (provided by the at least one power generation unit and the energy storage unit) is used to cover the demand of the electrical load and only if this is not sufficient the power grid is used, in this case the combination of internal and external energy (i.e. from the power grid) covers the electrical demand of the electrical installation of the building.
  • a user of the system may pay a first tariff per kWH for the amount of energy drawn from the power grid minus the energy supplied to the power grid if the amount of energy drawn from the grid is larger than the amount of energy supplied to the power grid (this amount of energy is measured by the main meter 11).
  • the user of the system may be paid a second tariff per kWH for the amount of energy supplied to the power grid minus the energy drawn from the power grid if the amount of energy supplied to the power grid is larger than the amount of energy drawn from the power grid (this amount of energy is measured by the main meter 11).
  • the first tariff may be higher than the second tariff.
  • the user may be paid a third tariff for energy supplied from the power generation units towards the junction 7 as measured by the power meter 31. Therefore it is in that case also economically
  • the power management unit 15 is adapted for checking the correct operation of the current sensor 14 and optionally for calibrating the current sensor 14. This is achieved in that (immediately) after the current sensor is fitted the power management unit 15 initiates an initial energy flow between the power grid connection unit 9 (i.e. coming from the power grid 8) and the at least one electrical load. This initial energy flow will make it possible to provide a correct indication of the direction of the electrical current flowing through the electrical conductor and/or an indication whether the current sensor is connected or not. In this way it is possible to correctly distinguish between electrical current coming from the at least one power generation unit 2, 3 and the energy storage unit 4 and electrical current coming from the power grid. Calibration of the current sensor is possible when the power management unit 15 initiates an initial energy flow of a
  • the regulation of the current towards or to zero can be arranged by detecting when the direction of the current changes and regulating such that a continuous changing of direction is detected, meaning that the current is regulated towards or to zero.
  • the power management unit is adapted for regulating the electrical current through the electrical conductor towards zero and if possible to zero by regulation of the magnitude of the energy flow to the energy storage unit wherein said magnitude has a positive sign if energy is stored in the energy storage unit and said magnitude has a negative sign if energy is supplied by the energy storage unit.
  • magnitude indicates the amplitude of the current and the direction of the current.
  • the electrical current through the electrical conductor is regulated to zero if the energy flow to the electrical load connector can be supplied solely by the energy storage unit and the power generation unit connector or if the energy flow supplied by the power generation unit connector can be supplied completely to the electrical load connector and the energy storage unit; and preferably in that the electrical conductor is regulated towards zero but does not reach zero if the energy flow drawn by the electrical load connector can not be supplied solely by the energy storage unit and the power generation unit connector so that a shortage energy flow is drawn from the power grid or the electrical conductor is regulated towards zero but does not reach zero if the energy flow supplied by the power generation unit connector cannot be supplied completely to the electrical load connector and the energy storage unit because the energy storage unit can not store the full surplus of energy flow so that the portion of the surplus of energy flow which can not be stored in the energy storage unit is supplied into the power grid.
  • the current sensor can also be positioned between the main meter 11 and the power grid connection unit 9 for measuring the same current.
  • the main meter is arranged for measuring the amount of energy drawn from the power grid minus the amount of energy fed into the power grid. It is also possible that the main meter is arranged for measuring separately the amount of energy drawn from the power grid and the amount of energy fed into the power grid. In the latter case it is possible that the main meter comprises a first meter and a second meter which are functionally and possibly physically separated from each other wherein the first meter is arranged for measuring the amount of energy drawn from the power grid and the second meter is arranged for measuring the amount of energy fed into the power grid.
  • the power control device 1 is provided with a power sensor 14' connected to the power management unit 15 for determining the amount of power submitted to the power grid via the power grid connection unit.
  • the power management unit 15 is arranged for lowering the amount of power supplied, in use, by the at least one power generation unit 2, 3 to the at least one power generation unit connector 50, 52 if the amount of power submitted to the power grid exceeds a predetermined value. In this way the chance may be lowered that a peak power is generated in the power grid 8 if the at least one power generation unit 2, 3 generates an high amount of power.
  • the predetermined value is a fixed
  • the predetermined value may be 70% of lkW. It is however also possible that the predetermined value is another fixed value not related to the maximum amount of power of unit 2 and/or unit 3.
  • the power control device is provided with a plurality of power generation unit connectors (50, 52) wherein the power control device is adapted for determining the amount of power submitted to the power grid via the power grid connection units and for lowering the amount of power supplied, in use, by at least one of the power generation units to at least one of the power generation unit connectors if the amount of power submitted to the power grid exceeds a predetermined value.
  • the power control device is adapted for determining the amount of power submitted to the power grid via the power grid connection units and for lowering the amount of power supplied, in use, by at least one of the power generation units to at least one of the power generation unit connectors if the amount of power submitted to the power grid exceeds a predetermined value.
  • the amount of power submitted by the windmill 3 to the power control device and thereby to the power grid is lowered.
  • both the amount of power submitted by the solar panel 2 to the power control device and thereby to the power grid is lowered as well as the amount of power submitted by the windmill 3 to the power control device and thereby to the power grid is lowered.
  • the power control device is adapted for lowering the amount of power supplied by each of a plurality of power generation units which are, in use, connected to a plurality of power generation unit connectors of the plurality of power generation unit connectors if the amount of power submitted to the power grid exceeds the predetermined value.
  • the predetermined value is a fixed percentage from the maximum amount of power which can be generated in combination by the plurality of power generation units which are, in use, connected to the plurality of power generation unit connectors.
  • the predetermined value can for example be 70% of 3kW. It may however also be another fixed value such as 2.5 kW.
  • the power control device is adapted so that if the power control device lowers the amount of power submitted to the power grid, this amount of power is lowered to the
  • the power sensor 14' is connected to control means 16 wherein the control means 16 controls the module 21 via line 32 for lowering the amount of power submitted by the power generation unit 2 to the power control device 1 and/or the control means 16 controls the module 22 via line 32 for lowering the amount of power submitted by the power generation unit 3 to the power control device respectively.
  • the power sensor 14 ' is formed by the current sensor 14.
  • the additional power sensor 14' may be deleted wherein the sensor 14 will function as the power sensor.
  • the current which is measured by means of the current sensor 14 is a measure of the power submitted to the grid if power is submitted to the grid 8.
  • the energy storage unit may be deleted.
  • the senor 14 can still be used for measuring the power submitted to the grid and for lowering - as discussed above- the amount of power supplied, in use, by the at least one power generation unit 2, 3 to the at least one power generation unit connector 50, 52 if the amount of power submitted to the power grid exceeds a predetermined value. If the energy storage unit 4 is deleted the module 20 may also be deleted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un dispositif de commande d'électricité pour une installation électrique d'un bâtiment, comprenant : au moins un connecteur d'unité de génération d'électricité destiné à se connecter à au moins une unité de génération d'électricité pour générer de l'électricité à partir de source renouvelable ; une unité de stockage d'électricité pour stocker l'électricité et pour distribuer l'électricité stockée ; un connecteur de charge électrique pour une connexion à au moins une charge électrique de l'installation électrique ; une unité de connexion de réseau électrique pour connecter la ou les charges électriques à un réseau électrique, pour tirer de l'électricité du réseau électrique et pour injecter de l'électricité dans le réseau électrique ; un compteur principal pour mesure la quantité d'électricité tirée du réseau électrique et injectée dans le réseau électrique ; le connecteur de charge électrique étant connecté à l'unité de connexion de réseau électrique par l'intermédiaire d'une jonction, l'unité de connexion de réseau électrique étant connectée à la jonction par un conducteur électrique ; un compteur électrique destiné à mesurer la somme d'électricité qui est distribuée à la jonction par le ou les connecteurs d'unité de génération d'électricité et l'unité de stockage d'électricité ; le ou les connecteurs d'unité de génération d'électricité et l'unité de stockage d'électricité étant connectés à la jonction par l'intermédiaire du compteur électrique ; un détecteur de courant couplé électromagnétiquement au conducteur électrique à une position de détection entre le compteur principal et la jonction, sans connexion électrique directe au conducteur électrique, pour créer un signal de détecteur de courant ; et une unité de gestion d'électricité, connectée au détecteur de courant pour recevoir le signal du détecteur de courant, l'unité de gestion d'électricité étant agencée pour commander le flux d'électricité entre le ou les connecteurs d'unité de génération d'électricité, l'unité de stockage d'électricité, le connecteur de charge électrique et/ou l'unité de Connexion de réseau électrique, au moins sur la base du signal du détecteur de courant.
EP12707940.8A 2011-06-07 2012-02-21 Dispositif de commande d'électricité pour une installation électrique d'un bâtiment et procédé de commande d'électricité d'une installation électrique d'un bâtiment Withdrawn EP2719049A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2006906 2011-06-07
PCT/NL2012/050099 WO2012169879A2 (fr) 2011-06-07 2012-02-21 Dispositif de commande d'électricité pour une installation électrique d'un bâtiment et procédé de commande d'électricité d'une installation électrique d'un bâtiment

Publications (1)

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EP2719049A2 true EP2719049A2 (fr) 2014-04-16

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EP12707940.8A Withdrawn EP2719049A2 (fr) 2011-06-07 2012-02-21 Dispositif de commande d'électricité pour une installation électrique d'un bâtiment et procédé de commande d'électricité d'une installation électrique d'un bâtiment

Country Status (3)

Country Link
EP (1) EP2719049A2 (fr)
AU (1) AU2012267307A1 (fr)
WO (1) WO2012169879A2 (fr)

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Publication number Priority date Publication date Assignee Title
GB2514092B (en) 2013-03-21 2017-11-29 Powervault Ltd Electrical energy storage device and system
SG10201406883UA (en) 2014-10-23 2016-05-30 Sun Electric Pte Ltd "Power Grid System And Method Of Consolidating Power Injection And Consumption In A Power Grid System"
GB2578449B (en) * 2018-10-26 2021-05-12 Mixergy Ltd Energy management

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
JP2007236193A (ja) * 2003-05-07 2007-09-13 Ebara Densan Ltd 系統連系インバータを含む電源装置
JP2004357390A (ja) * 2003-05-28 2004-12-16 Ebara Densan Ltd 系統連系インバータを含む電源装置
NL1031646C2 (nl) * 2006-04-20 2007-10-23 Nedap Nv Modulair bidirectionaal bussysteem voor het uitwisselen van energie tussen modules.
DE102009040090A1 (de) * 2009-09-04 2011-03-10 Voltwerk Electronics Gmbh Inseleinheit für ein Energienetz mit einer Steuereinheit zum Steuern eines Energieflusses zwischen der Energieerzeugungseinheit, der Energiespeichereinheit, der Lasteinheit und/oder dem Energienetz
JP5672087B2 (ja) * 2010-04-02 2015-02-18 オムロン株式会社 制御装置および制御方法

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See references of WO2012169879A2 *

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WO2012169879A2 (fr) 2012-12-13
AU2012267307A1 (en) 2013-05-02
WO2012169879A3 (fr) 2013-09-19

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