WO2023242053A1 - Dispositif de commande - Google Patents

Dispositif de commande Download PDF

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Publication number
WO2023242053A1
WO2023242053A1 PCT/EP2023/065374 EP2023065374W WO2023242053A1 WO 2023242053 A1 WO2023242053 A1 WO 2023242053A1 EP 2023065374 W EP2023065374 W EP 2023065374W WO 2023242053 A1 WO2023242053 A1 WO 2023242053A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical bus
electrical
bus
current
coupled
Prior art date
Application number
PCT/EP2023/065374
Other languages
English (en)
Inventor
Mark Potter
Original Assignee
3Ti Energy Hubs Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3Ti Energy Hubs Ltd filed Critical 3Ti Energy Hubs Ltd
Publication of WO2023242053A1 publication Critical patent/WO2023242053A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—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
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic 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
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks

Definitions

  • the present invention relates to a controller, in particular a controller for providing phase balancing to a three phase power supply.
  • An electrical grid power supply is usually provided via a three phase alternating current (AC) supply, where each phase is shifted by 120 degrees with respect to the other phases.
  • AC alternating current
  • circuits attached to the power supply are preferably designed to provide equal loads on each phase to provide a balanced load, thereby reducing power losses.
  • the present invention provides a controller for performing phase balancing to a three phase power supply to allow phase balancing between different phases of a multi-phase power supply to be adjusted dynamically.
  • the controller is arranged to dynamically perform phase balancing in response to changes in loads placed on different phases of the multi-phase power supply.
  • Figure 1 illustrates a schematic of a phase balancing system in accordance with an aspect of the present invention.
  • Figure 1 illustrates a three phase mains supply 101, otherwise known as a grid supply, to which is coupled a three phase electrical bus, which include three electrical buses 107, 108, 109 and a neutral 110.
  • a respective current sensor 102 for example a current transformer, which are coupled to a controller 121, where the controller is arranged to monitor the current on each of the electrical busses 107, 108, 109 using the current sensor 102 readings.
  • coupled to the three phase electrical bus will be one or more fixed, uncontrolled electrical loads, which in the present embodiment include a first load and a second load.
  • the first load is a three phase device that is coupled to each of the three electrical buses 107, 108, 109.
  • the second load is a single phase device that is coupled to one of the electrical buses 107, 108, 109 and neutral 110.
  • the load on the first load and the second load are fixed and uncontrolled. In other words, the current load for the first load and the second load cannot be dynamically varied remotely from the respective loads.
  • the present embodiment illustrates two uncontrolled loads being coupled to the three phase mains supply 101, any combination of uncontrolled loads may be coupled to the three phase mains supply 101 or none at all.
  • the uncontrolled loads are coupled to the three phase mains supply, the uncontrolled loads are arranged to be balanced across the three electrical phases of the three phase mains supply, in other words, the uncontrolled loads result in a load on each of the three phases that is substantially the same.
  • operation or deactivation of the respective uncontrolled loads may result in a load imbalance, for example if one of the uncontrolled loads is a heater, operation of the heater may cause a load imbalance depending on the state of other loads connected to the three phase electrical bus.
  • one or more electric vehicle, EV, charging ports 113, 114, 115, 116, 117, 118, 119, 110 are coupled to the three phase electrical bus 107, 108, 109, 110 to support single phase AC charging of an EV or three phase AC charging.
  • the EV charging ports will be controlled loads, where the controller can dynamically vary the load that each EV charging port imparts on the electrical system. For example, if an EV charging port is being used to charge an EV that is causing a load imbalance between the different electrical busses 107, 108, 109, the controller 121 can dynamically vary the power provided by the EV charging port to reduce the load imbalance.
  • the controller 121 can control current from an electric vehicle, EV, charging port to an EV if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus.
  • the three phase electrical bus is coupled to a DC bus 111, 112 via an AC/DC converter 105 that can act as an inverter and/or rectifier.
  • a photovoltaic, PV, panel 106 that is arranged to generate an electrical current when exposed to sunlight.
  • the PV panel will be connected to the DC bus via power control electronics, for example a maximum power point tracker, a DC:DC converter or a pulse width modulation, PWM, controller.
  • a DC battery (not shown) is also coupled to the DC bus 111, 112 for storing charge from the three phase mains supply and/or the PV panel 106.
  • the battery may be directly or indirectly connected to the DC bus. If the battery is indirectly connected to the DC bus typically this will be via power control electronics.
  • the PV panel 106 will typically comprise an array of PV panels, as such any reference to PV panel includes an array of PV panels or any other PV panel configuration, for example where one or more maximum power point tracking controllers are coupled to one or more PV arrays.
  • the controller 121 is arranged to monitor the current load on each of the electrical buses 107, 108, 109, wherein the controller 121 is arranged to control the AC/DC converter 105, acting as an inverter, to provide current generated by the PV panel 106 on to one or more of the electrical busses 107, 108, 109 if the current difference between the electrical busses 107, 108, 109 exceeds a predetermined threshold, thereby allowing the current loads on each of the electrical busses 107, 108, 109 to be balanced.
  • the predetermined threshold may be selected based on the electrical bus/load configuration and the electrical losses that may be acceptable resulting from a load imbalance between the electrical busses 107, 108, 109.
  • the current difference between the electrical busses 107, 108, 109 will be substantially zero.
  • the current generated by the PV panel 106 can be used to balance the current loads between the electrical busses 107, 108, 109 by directing current from the PV panel 106 to one or more of the electrical busses 107, 108, 109. This can also provide the advantage of allowing an EV to be charged using less power from the three phase mains supply 101 than otherwise would be used.
  • the controller can be arranged to provide current from the battery, via the AC/DC converter operating as an inverter, on to one or more of the electrical busses 107, 108, 109.
  • the controller 121 can direct current from the battery to one or more of the electrical busses 107, 108, 109 to supplement the current generated by the PV panel 106 to allow the current loads on each of the electrical busses 107, 108, 109 to be balanced.
  • the controller 121 may be configured to control the AC/DC converter 105 to balance the current load on the electrical bus by providing current from one or more of the electrical busses 107, 108, 109 to another one or more of the electrical busses 107, 108, 109, if the current difference between any one of the electrical busses 107, 108, 109 exceeds a predetermined threshold value to substantially balance the current load on the electrical bus.
  • the controller 121 may be configured to balance the current load by transferring current from one electrical bus to another electrical bus if the current generated by the PV panel 106 is not sufficient to fully balance a current imbalance on the electrical bus.
  • the controller can reduce a phase/load imbalance between the electrical buses 107, 108, 109 by controlling a controller load coupled to the electrical bus, by directing current from the P V panel 106 to one or more electrical buses, by directing current from the battery to one or more electrical buses and/or diverting current from one electrical bus to another electrical bus.
  • a controller for providing phase balancing for a three phase power supply wherein a first phase of the three phase power supply is coupled to a first electrical bus, a second phase of the three phase power supply is coupled to a second electrical bus, and a third phase of the three phase power supply is coupled to a third electrical bus, wherein the first electrical bus, the second electrical bus and the third electrical bus are coupled via an inverter to a direct current, DC, bus to which is coupled at least one photovoltaic, PV, panel, wherein the controller comprises a device for monitoring current in the first electrical bus, the second electrical bus and the third electrical bus, wherein the device is arranged to control the inverter to provide current generated by the at least one PV panel to at least one of the first electrical bus, the second electrical bus and the third electrical bus if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus.
  • the device is arranged to control the inverter to provide current from a battery coupled to the DC bus to at least one of the first electrical bus, the second electrical bus and the third electrical bus if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus.
  • the device is arranged to control current from an electric vehicle, EV, charging port to an EV if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus, wherein the EV charging port is coupled to the first electrical bus, the second electrical bus and/or the third electrical bus.
  • the device is arranged to control a rectifier coupled to the first electrical bus, the second electrical bus and the third electrical bus and the inverter for providing current from one of the first electrical bus, the second electrical bus and the third electrical bus to another one of the electrical buses if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus.
  • a rectifier coupled to the first electrical bus, the second electrical bus and the third electrical bus and the inverter for providing current from one of the first electrical bus, the second electrical bus and the third electrical bus to another one of the electrical buses if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus.
  • a controller for providing phase balancing for a three phase power supply wherein a first phase of the three phase power supply is coupled to a first electrical bus, a second phase of the three phase power supply is coupled to a second electrical bus, and a third phase of the three phase power supply is coupled to a third electrical bus
  • the controller comprises a device for monitoring current in the first electrical bus, the second electrical bus and the third electrical bus, wherein the device is arranged to control current from an electric vehicle, EV, charging port to an EV if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus, wherein the EV charging port is coupled to the first electrical bus, the second electrical bus and/or the third electrical bus.
  • a method for providing phase balancing for a three phase power supply wherein a first phase of the three phase power supply is coupled to a first electrical bus, a second phase of the three phase power supply is coupled to a second electrical bus, and a third phase of the three phase power supply is coupled to a third electrical bus, wherein the first electrical bus, the second electrical bus and the third electrical bus are coupled via an inverter to a direct current, DC, bus to which is coupled at least one photovoltaic, PV, panel, wherein the method comprises monitoring current in the first electrical bus, the second electrical bus and the third electrical bus, and controlling the inverter to provide current generated by the at least one PV panel to at least one of the first electrical bus, the second electrical bus and the third electrical bus if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus.
  • a method for providing phase balancing for a three phase power supply wherein a first phase of the three phase power supply is coupled to a first electrical bus, a second phase of the three phase power supply is coupled to a second electrical bus, and a third phase of the three phase power supply is coupled to a third electrical bus, wherein the method comprises monitoring current in the first electrical bus, the second electrical bus and the third electrical bus, and controlling current from an electric vehicle, EV, charging port to an EV if the current difference between the first electrical bus, the second electrical bus and/or the third electrical bus exceeds a predetermined threshold value to substantially balance the current load on the first electrical bus, the second electrical bus and the third electrical bus, wherein the EV charging port is coupled to the first electrical bus, the second electrical bus and/or the third electrical bus.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un dispositif de commande permettant d'équilibrer les phases d'une alimentation électrique triphasée, une première phase de l'alimentation électrique triphasée étant couplée à un premier bus électrique, une deuxième phase de l'alimentation électrique triphasée étant couplée à un deuxième bus électrique et une troisième phase de l'alimentation électrique triphasée étant couplée à un troisième bus électrique, le premier bus électrique, le deuxième bus électrique et le troisième bus électrique étant couplés par l'intermédiaire d'un onduleur à un bus de courant continu auquel est couplé au moins un panneau photovoltaïque, le dispositif de commande comprenant un dispositif de surveillance de courant dans le premier bus électrique, le deuxième bus électrique et le troisième bus électrique, le dispositif étant conçu pour commander l'onduleur afin de fournir le courant généré par le ou les panneaux photovoltaïques à au moins l'un des trois bus électriques si la différence de courant entre le premier bus électrique, le deuxième bus électrique et/ou le troisième bus électrique dépasse une valeur seuil prédéterminée afin d'équilibrer substantiellement la charge de courant sur le premier bus électrique, le deuxième bus électrique et le troisième bus électrique.
PCT/EP2023/065374 2022-06-13 2023-06-08 Dispositif de commande WO2023242053A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2208595.5 2022-06-13
GB2208595.5A GB2619910A (en) 2022-06-13 2022-06-13 A controller

Publications (1)

Publication Number Publication Date
WO2023242053A1 true WO2023242053A1 (fr) 2023-12-21

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ID=82496391

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Application Number Title Priority Date Filing Date
PCT/EP2023/065374 WO2023242053A1 (fr) 2022-06-13 2023-06-08 Dispositif de commande

Country Status (2)

Country Link
GB (1) GB2619910A (fr)
WO (1) WO2023242053A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110278931A1 (en) * 2010-05-13 2011-11-17 Eaton Corporation Uninterruptible power supply systems and methods supporting load balancing
FR3018006A1 (fr) * 2014-02-27 2015-08-28 Hager Electro Sas Systeme de commutation controlee pour le raccordement selectif d'un reseau electrique triphase
US20160285273A1 (en) * 2013-03-19 2016-09-29 Merus Power Dynamics Oy Method and apparatus for compensating non-active currents in electrical power networks
US10381942B1 (en) * 2011-10-11 2019-08-13 Juniper Networks, Inc. Balancing power distribution
US20190359077A1 (en) * 2018-05-28 2019-11-28 Mahle International Gmbh Method of operating a charging system with multiple charging points
EP3782849A2 (fr) * 2019-08-13 2021-02-24 Zaptec IP AS Dispositif de charge à courant continu pour véhicule électrique et pour assurer la gestion de l'énergie d'un réseau connecté
US20210320497A1 (en) * 2018-08-30 2021-10-14 Siemens Aktiengesellschaft Device for a low-voltage circuit for unbalanced load reduction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008312360A (ja) * 2007-06-15 2008-12-25 Hitachi Appliances Inc 電力変換装置及びモジュール
US20130155738A1 (en) * 2011-12-19 2013-06-20 General Electric Company System and method for controlling reactive power in a power conversion system
DE102018204157A1 (de) * 2018-03-19 2019-09-19 Mahle International Gmbh Verfahren zum Laden von elektrischen Verbrauchern

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110278931A1 (en) * 2010-05-13 2011-11-17 Eaton Corporation Uninterruptible power supply systems and methods supporting load balancing
US10381942B1 (en) * 2011-10-11 2019-08-13 Juniper Networks, Inc. Balancing power distribution
US20160285273A1 (en) * 2013-03-19 2016-09-29 Merus Power Dynamics Oy Method and apparatus for compensating non-active currents in electrical power networks
FR3018006A1 (fr) * 2014-02-27 2015-08-28 Hager Electro Sas Systeme de commutation controlee pour le raccordement selectif d'un reseau electrique triphase
US20190359077A1 (en) * 2018-05-28 2019-11-28 Mahle International Gmbh Method of operating a charging system with multiple charging points
US20210320497A1 (en) * 2018-08-30 2021-10-14 Siemens Aktiengesellschaft Device for a low-voltage circuit for unbalanced load reduction
EP3782849A2 (fr) * 2019-08-13 2021-02-24 Zaptec IP AS Dispositif de charge à courant continu pour véhicule électrique et pour assurer la gestion de l'énergie d'un réseau connecté

Also Published As

Publication number Publication date
GB202208595D0 (en) 2022-07-27
GB2619910A (en) 2023-12-27

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