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WO2017090896A1 - Dispositif de gestion d'énergie électrique d'un système d'alimentation électrique, lié à des ressources d'énergie électrique distribuées, et son procédé - Google Patents

Dispositif de gestion d'énergie électrique d'un système d'alimentation électrique, lié à des ressources d'énergie électrique distribuées, et son procédé Download PDF

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Publication number
WO2017090896A1
WO2017090896A1 PCT/KR2016/012101 KR2016012101W WO2017090896A1 WO 2017090896 A1 WO2017090896 A1 WO 2017090896A1 KR 2016012101 W KR2016012101 W KR 2016012101W WO 2017090896 A1 WO2017090896 A1 WO 2017090896A1
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WO
WIPO (PCT)
Prior art keywords
power
energy storage
storage device
failure
power conversion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2016/012101
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English (en)
Korean (ko)
Inventor
임지훈
최진혁
이성은
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.)
Korea Electric Power Corp
Original Assignee
Korea Electric Power Corp
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 Korea Electric Power Corp filed Critical Korea Electric Power Corp
Publication of WO2017090896A1 publication Critical patent/WO2017090896A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers

Definitions

  • the present invention relates to a power management device and a method of a power system linked to a distributed power source, and more particularly, to a power management device of a distributed power system linked to a distributed power source that can freely change the connection between the power converter and the energy storage device. And to a method thereof.
  • the power management device is connected to a power conversion system (PCS), a battery management system (BMS) and an energy storage system (ESS) including a battery for loads in a power system. It is driving.
  • PCS power conversion system
  • BMS battery management system
  • ESS energy storage system
  • Such a power management device has a problem in that when a failure occurs in some power converters, an energy storage device connected in series with the power converter may not be used even though the power storage device is not broken.
  • the purpose of the energy storage device applied to the power system is to remove the grid anxiety element, and when a sudden power failure occurs, the power storage device as well as the connected energy storage device cannot be used without a replacement device. As a result, the utilization of energy storage devices is reduced.
  • the failure of the power converter is higher than the frequency of failure of the energy storage device, and the major components (IGBT, etc.) are mostly expensive, and imported products also have a problem in that it takes a long time to supply and receive.
  • Korean Patent Publication No. 2015-0040168 discloses a "power converter and energy storage system.”
  • the present invention has been invented to solve the above problems.
  • the power converter and the energy are connected so that an energy storage device connected to the power converter is connected to a nearby power converter. It is an object of the present invention to provide a power management device and a method of a power system in which distributed power sources for controlling the operation of switches provided between storage devices are linked.
  • a power management apparatus of a power system in which a distributed power source is connected includes a plurality of power converters connected in parallel with the power system; A plurality of energy storage devices connected to the plurality of power conversion devices, respectively, to store power supplied from the power conversion device or to supply the stored power to the power system through the power conversion device; And when a failure occurs in at least one of the plurality of power converters, an energy storage device connected to the corresponding power converter is connected to any one of the neighboring power converters. And a control unit for controlling opening and closing of switches provided between the corresponding energy storage device.
  • the plurality of power converters are supplied by converting the DC power supplied from the connected energy storage device into AC power to supply power to the power system, or by converting the AC power supplied from the power system into DC power is connected. It is characterized in that the supply to the energy storage device.
  • the switches are provided between a first switch provided on the power conversion device side and a second switch provided on the energy storage device side, and between the first switch and the second switch, and the adjacent power conversion device and the energy storage device. It is characterized by consisting of a third switch providing a connection path.
  • the first switch and the second switch is in a closed state
  • the third switch is characterized in that the open state
  • control unit the failure detection unit for detecting the occurrence of the failure of the plurality of power conversion device;
  • a first connection state changer configured to change the switches connected to the power conversion device in which a failure is detected, to an open state;
  • An alternative device selection unit for selecting an alternative power converter to be newly connected to the energy storage device connected to the power converter that has detected a failure;
  • a second switch configured to change a switch provided on the energy storage device side connected to the power converter in which a failure has been detected, and a switch providing a connection path between the corresponding energy storage device and the alternative power converter from the open state to the closed state.
  • Connection state changing unit characterized in that it comprises a.
  • the alternative device selection unit is transferred from the power conversion device or the manager of the use of the energy storage devices interconnected among the power conversion devices provided in the vicinity of the energy storage device connected to the power conversion device is detected a failure occurs.
  • connection state changing unit is characterized in that the switch provided on the side of the alternative power conversion device and the energy storage device previously connected to change from the closed state to the open state.
  • a power management method of a power system linked to a distributed power source is distributed including a plurality of energy storage devices respectively connected to a plurality of power converters connected in parallel with the power system.
  • a power management method of a power system to which a power source is linked the control method comprising: detecting, by a controller, a failure of at least one of the plurality of power converters; And controlling, by the controller, opening and closing of switches provided between the power converter and the energy storage device such that the energy storage device connected to the corresponding power converter is connected to the neighboring power converter.
  • Changing the switches connected to the open state selecting an alternative power conversion device to be connected to an energy storage device connected to the power conversion device in which a failure is detected; And a switch provided at an energy storage device side connected to the power conversion device in which a failure has been detected, and a switch providing a connection path between the energy storage device connected to the power conversion device in which a failure has been detected and the alternative power conversion device. And changing the state from the open state to the closed state.
  • the step of selecting an alternative power converter to be connected to the energy storage device connected to the power conversion device is detected failure, the power provided in the vicinity of the energy storage device is connected to the power converter is detected a failure occurrence
  • a power converter configured according to a pre-control command transmitted from a power converter that has completed use of an interconnected energy storage device or a manager is selected as an alternative power converter.
  • a switch provided on the energy storage device side connected to the power conversion device in which a failure is detected provides a connection path between the energy storage device and the alternative power conversion device connected to the power conversion device in which a failure is detected.
  • the switch provided on the energy storage device side connected to the alternative power conversion device is characterized in that the change from the closed state to the open state.
  • the power converter when a failure occurs in the power converter, the power converter is connected to the energy storage device connected to the power converter.
  • the energy storage device connected to the failed power converter is connected to another power conversion device to maximize the utilization of the energy storage device to improve the stability and reliability of the power supply.
  • the present invention is able to selectively perform maintenance only the power conversion device is detected a failure, there is an effect that can reduce the maintenance cost and time.
  • FIG. 1 is a view for explaining the configuration of a power management device of a power system linked to a distributed power source according to the present invention.
  • FIG. 2 is a view for explaining the basic circuit configuration of the power management device of the power system linked to the distributed power source according to the present invention.
  • FIG. 3 is a view for explaining the configuration of a control unit employed in the power management device of the power system linked to the distributed power source according to the present invention.
  • FIG. 4 is a diagram illustrating a circuit configuration when a failure of a power conversion failure device occurs in a power management device of a power system to which a distributed power source is connected according to the present invention.
  • FIG. 5 is a diagram illustrating a circuit configuration that is changed between a power conversion device and an energy storage device when a failure of the power conversion failure device occurs in a power management device of a power system to which a distributed power source is connected according to the present invention.
  • FIG. 6 is a flowchart illustrating a procedure of a power management method of a power system linked to a distributed power source according to the present invention.
  • FIG. 1 is a view for explaining the configuration of a power management device of a power system linked to a distributed power source according to the present invention.
  • the power management device 100 of a power system in which distributed power sources are linked according to the present invention includes a power conversion device 110, an energy storage device 120, and a controller 130. do.
  • the power converter 110 is connected in parallel with the power system is provided with a plurality.
  • the power conversion device 110 converts DC power supplied from the energy storage device 120 connected to AC power to supply power to the power system, or converts AC power supplied from the power system to DC power for connection. It serves to supply to the energy storage device 120.
  • the energy storage device 120 is provided in series with a plurality of power converters, respectively, in series, and stores (charges) the power supplied from the power converter 110, or stores the stored power through the power converter 110. It serves to supply (discharge) the system.
  • the energy storage device 120 may include a battery and a battery management system (BMS).
  • BMS battery management system
  • the battery management device is a device for controlling the battery to exhibit the maximum performance, such as battery capacity, protection, life expectancy, charge / discharge control.
  • the controller 130 connects the energy storage device 120 connected with the corresponding power converter to any one of the neighboring power converters. As such, the opening and closing operations of the switches provided between the power converter and the energy storage device 120 are controlled.
  • FIG. 2 is a view for explaining the basic circuit configuration of the power management device of the power system linked to the distributed power source according to the present invention.
  • the switch configured in the basic circuit of the power management device 100 of the power system to which the distributed power supply is connected according to the present invention is a first switch provided at the power conversion device 110a.
  • the second switch B_1... B_N and the first switch and the second switch provided at the side of P_1... P_N and the energy storage devices 120a .. 120d and the connection path between the neighboring power converter and the energy storage device. It consists of a third switch (M_1 ... M_N) to provide a.
  • the first switch and the second switch are kept in the closed state, and the third switch is kept in the open state.
  • FIG. 3 is a view for explaining the configuration of a control unit employed in the power management device of the power system linked to the distributed power source according to the present invention
  • Figure 4 is a power management device of the power system linked to the distributed power source according to the present invention
  • FIG. 5 is a diagram illustrating a circuit configuration when a failure occurs in the power conversion failure device.
  • FIG. 5 is a view showing a power conversion device and energy storage when a failure occurs in the power conversion failure device in a power management device of a power system in which distributed power supplies are linked according to the present invention. It is a figure for demonstrating the circuit structure changed between apparatuses.
  • the controller 130 when a failure is detected in at least one of the plurality of power converters, the controller 130 according to the present invention has an adjacent energy storage device connected to the power converter. In order to be connected to any one of the power converters, the opening and closing of the switches provided between the power converter and the energy storage device is controlled.
  • the controller 130 includes a failure detecting unit 131, a first connection state changing unit 132, an alternative device selection unit 133, and a second connection state changing unit 134.
  • the failure detector 131 detects a failure of a plurality of power converters.
  • the failure detector 131 may analyze the pulse signal of the power converter to determine whether there is a failure (disruption or ground fault). For example, if a high level pulse signal is input as the photo coupler of the power converter operates in a certain section, but a low level pulse signal is continuously input, it may be diagnosed that an abnormality has occurred in the power converter. Can be.
  • the failure detection unit 131 according to the present invention has been described as a configuration included in a control unit for convenience of description, but is not limited thereto and may be configured separately.
  • the first connection state changing unit 132 changes the switches connected to the power conversion device in which the failure is detected to the open state.
  • the first connection state changing unit 132 closes the first switch provided on the power converter device in which a failure is detected and the second switch provided on the energy storage device connected to the power converter in which the failure is detected. Change from open to open.
  • the first connection state changer 132 may switch and power the switch and power provided at the power converter 2110b.
  • the switch provided on the energy storage device 2 (120b) side connected to the conversion device 2 (110b) is changed to the open state.
  • the alternative device selector 133 selects an alternative power converter to be newly connected to the energy storage device connected to the power converter that has detected a failure.
  • the alternative device selector 133 replaces the power converter that has completed the use of the energy storage devices connected to each other among the power converters provided in the vicinity of the energy storage device connected to the power converter in which the failure is detected. Select it as a converter.
  • the alternative device selection unit 133 may determine that the use is completed when the charging or discharging of the energy storage device is completed or the end of life. The state of the energy storage device is determined by the battery management device described above.
  • the alternative device selection unit 133 may be preset or set in real time according to a control command transmitted from an administrator among power conversion devices provided in the vicinity of the energy storage device connected to the power conversion device in which a failure is detected.
  • the power converter may be selected as an alternative power converter. That is, the control command includes setting information about the power converter selected as the alternative power converter.
  • the alternative device selecting unit 133 may further include a communication means (not shown) for receiving a control command transmitted from the manager.
  • the alternative device selection unit 133 may select the alternative power converter automatically or according to a control command of the administrator.
  • the replacement device selector 133 may include the power converter 1 (near the energy storage device 2 120b).
  • One of 110a) or power converter 3 (110c) is selected as an alternative power converter.
  • the second connection state changing unit 134 opens a switch that is provided on the energy storage device side connected to the power converter in which a failure is detected, and provides a connection path between the corresponding energy storage device and the alternative power converter. Change from closed to closed. On the other hand, the second connection state changing unit 134 changes the switch provided on the side of the alternative power conversion device and the energy storage device previously connected from the closed state to the open state.
  • the second connection state change unit 134 may be connected to the first power conversion device 1110a.
  • the switch provided on the energy storage device 1 (120a) side is changed from the closed state to the open state, and then the switch, the power converter 2 (110b) and the energy storage device 2 (120b) provided on the energy storage device 2 (120b) side.
  • FIG. 6 is a flowchart illustrating a procedure of a power management method of a power system linked to a distributed power source according to the present invention.
  • the power management method of the power system to which the distributed power supply is linked uses a power management device of the power system to which the distributed power supply is linked as described above. Shall be.
  • the distributed power supply according to the present invention includes a plurality of power converters connected in parallel with a power system and a plurality of energy storage devices respectively connected in series.
  • step S100 a failure occurrence of at least one of the plurality of power converters is detected (S100).
  • step S100 whether a failure of the power converter is detected is detected according to an analysis result of a pulse signal input according to an operation of a photo coupler included in the power converter.
  • step S200 the switches connected to the power conversion device in which the failure is detected are changed from the closed state to the open state.
  • the switch provided on the power conversion device side in which the failure occurrence is detected and the switch provided on the energy storage device side connected to the power conversion device in which the failure occurrence is detected are changed from the closed state to the open state.
  • Step S300 is a pre-control command transmitted from the power conversion device or the manager of which the use of the energy storage devices that are interconnected among the power conversion devices provided in the vicinity of the energy storage device that is connected to the power conversion device in which a failure is detected is completed.
  • the power converter set according to the present invention is selected as an alternative power converter.
  • a switch provided on the energy storage device side connected to the power conversion device in which a failure is detected, and a connection path between the energy storage device connected to the power conversion device in which a failure is detected and the alternative power conversion device are provided.
  • the switch is changed from an open state to a closed state to connect an energy storage device and an alternative power converter connected to the power converter in which a failure is detected (S400).
  • the power switch when a failure occurs in the power converter, the power switch may be configured between the power converter and the energy storage device connected to the power converter.
  • the energy storage device connected to the failed power converter may be connected to another power converter to maximize the utilization of the energy storage device, thereby improving the stability and reliability of the power supply.
  • the present invention can selectively perform maintenance only the power conversion device is detected a failure, it is possible to reduce the maintenance cost and time.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

La présente invention concerne un dispositif de gestion d'énergie électrique d'un système d'alimentation électrique, lié à des ressources d'énergie électrique distribuées, et un procédé associé, le dispositif de gestion d'énergie électrique comprenant : une pluralité de dispositifs de conversion de puissance connectés en parallèle au système d'alimentation électrique; une pluralité de dispositifs de stockage d'énergie connectés respectivement à la pluralité de dispositifs de conversion de puissance afin de stocker de l'énergie électrique fournie à partir des dispositifs de conversion de puissance ou pour fournir l'énergie électrique stockée au système d'alimentation électrique par l'intermédiaire des dispositifs de conversion de puissance; et une unité de commande pour commander, lorsque l'apparition d'un dysfonctionnement d'au moins un parmi la pluralité de dispositifs de conversion de puissance est détectée, des opérations d'ouverture/de fermeture des commutateurs prévus entre des dispositifs de conversion de puissance correspondants et un dispositif de stockage d'énergie correspondant de telle sorte que le dispositif de stockage d'énergie connecté à un dispositif de conversion de puissance correspondant soit connecté à l'un quelconque des dispositifs de conversion de puissance voisins.
PCT/KR2016/012101 2015-11-25 2016-10-26 Dispositif de gestion d'énergie électrique d'un système d'alimentation électrique, lié à des ressources d'énergie électrique distribuées, et son procédé Ceased WO2017090896A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150165791A KR20170060971A (ko) 2015-11-25 2015-11-25 분산전원이 연계된 전력 계통의 전력 관리 장치 및 그 방법
KR10-2015-0165791 2015-11-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019106257A1 (de) * 2019-03-12 2020-09-17 Sma Solar Technology Ag Batterie-Wechselrichtersystem

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102336316B1 (ko) * 2018-09-13 2021-12-07 엘에스일렉트릭 (주) 전원 공급 장치 및 전원 공급 시스템
KR102102849B1 (ko) * 2019-08-14 2020-04-22 한국전력기술 주식회사 원자력 발전소 화재 시의 안전정지 분석 방법

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPH05146098A (ja) * 1991-11-22 1993-06-11 Toshiba Corp 無停電電源装置
JPH05276671A (ja) * 1992-03-24 1993-10-22 Toshiba Corp 並列冗長形無停電電源装置
KR100665950B1 (ko) * 2004-12-10 2007-01-10 주식회사 맥스컴 무정전 전원장치의 무순단 절체를 위한 이중화 회로구성방법
KR100986627B1 (ko) * 2010-03-12 2010-10-11 주식회사 지오닉스 병렬운전형 ｕｐｓ에 구비되는 각 축전지의 방전을 위한 이중화장치
KR101514803B1 (ko) * 2014-07-09 2015-04-23 주식회사 나산전기산업 신재생에너지 계통연계 분산 전원에 사용되는 단상 전압형 spwm 인버터 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05146098A (ja) * 1991-11-22 1993-06-11 Toshiba Corp 無停電電源装置
JPH05276671A (ja) * 1992-03-24 1993-10-22 Toshiba Corp 並列冗長形無停電電源装置
KR100665950B1 (ko) * 2004-12-10 2007-01-10 주식회사 맥스컴 무정전 전원장치의 무순단 절체를 위한 이중화 회로구성방법
KR100986627B1 (ko) * 2010-03-12 2010-10-11 주식회사 지오닉스 병렬운전형 ｕｐｓ에 구비되는 각 축전지의 방전을 위한 이중화장치
KR101514803B1 (ko) * 2014-07-09 2015-04-23 주식회사 나산전기산업 신재생에너지 계통연계 분산 전원에 사용되는 단상 전압형 spwm 인버터 시스템

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019106257A1 (de) * 2019-03-12 2020-09-17 Sma Solar Technology Ag Batterie-Wechselrichtersystem
US11770004B2 (en) 2019-03-12 2023-09-26 Sma Solar Technology Ag Battery inverter system

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