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WO2018113683A1 - Système de commande de grappe de stockage d'énergie et système de stockage d'énergie - Google Patents

Système de commande de grappe de stockage d'énergie et système de stockage d'énergie Download PDF

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Publication number
WO2018113683A1
WO2018113683A1 PCT/CN2017/117279 CN2017117279W WO2018113683A1 WO 2018113683 A1 WO2018113683 A1 WO 2018113683A1 CN 2017117279 W CN2017117279 W CN 2017117279W WO 2018113683 A1 WO2018113683 A1 WO 2018113683A1
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Prior art keywords
energy storage
storage unit
controller
storage cluster
control system
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PCT/CN2017/117279
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English (en)
Chinese (zh)
Inventor
张建兴
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NIO Nextev Ltd
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NIO Nextev Ltd
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    • 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

Definitions

  • the invention relates to the technical field of power system frequency modulation, in particular to an energy storage cluster control system and an energy storage system.
  • the battery energy storage system has fast bidirectional power regulation capability, which can meet the requirements of high frequency short-time fast bidirectional power regulation. Therefore, the energy storage system is used to assist the generator set frequency modulation. A new technology development and application trend.
  • a frequency modulation for the power grid generator set is provided.
  • Energy storage cluster control system In addition, an energy storage system is also provided.
  • An energy storage cluster control system for frequency regulation of a power grid generator set characterized in that the system comprises: an energy storage cluster controller, an energy storage unit controller, an energy storage converter and a battery management system; wherein:
  • the energy storage cluster controller is configured to receive an adjustment power value and a frequency modulation control instruction, and a current capacity and state of the energy storage unit in real time, and receive information of the energy storage converter and the battery management system in real time, and The energy storage unit controller sends a first instruction;
  • the energy storage unit controller is configured to receive the first instruction sent by the energy storage cluster controller, and information sent by the energy storage converter and the battery management system, and perform judgment a control signal, and transmitting the first control signal to the energy storage converter for charging and discharging control;
  • the energy storage converter is configured to receive the first control signal, perform control protection according to information of internal and external devices, and send information of the internal and external devices to the energy storage unit controller in time.
  • the power grid includes an automatic power generation control scheduling device, wherein the energy storage cluster controller performs point-to-point communication with the automatic power generation control scheduling device through an optical fiber real-time Ethernet.
  • the adjusted power value and the FM control command are sent by the automatic power generation control scheduling device to the energy storage cluster controller.
  • the energy storage cluster controller is configured with an N-channel optical real-time Ethernet interface for communicating with the energy storage unit controller in a point-to-point communication manner; wherein the N takes a positive integer.
  • the energy storage unit controller is disposed on a near side of the energy storage cluster controller, and the energy storage unit controller and the energy storage cluster controller are connected by an industrial field bus.
  • the industrial field bus is a CAN bus.
  • the energy storage cluster control system is divided into three layers, wherein the top layer includes an energy storage cluster controller, the middle layer includes an energy storage unit controller, and the bottom layer includes an energy storage converter and a battery management system.
  • next layer is controlled by the upper layer, and when the upper layer fails, the next layer can keep the instructions received before the fault run independently.
  • an energy storage system is also provided.
  • the energy storage system includes any of the above energy storage cluster control systems.
  • the energy storage system further includes two or more energy storage units arranged in parallel, each energy storage unit includes a plurality of branches, each of which includes an energy storage converter, an energy storage battery, and a battery management. system.
  • Embodiments of the present invention provide an energy storage cluster control system and an energy storage system.
  • the energy storage cluster control system is used for frequency regulation of the power grid generator set, and includes: an energy storage cluster controller, an energy storage unit controller, and an energy storage converter and a battery management system; wherein the energy storage cluster controller is configured to receive the regulated power The value and frequency control commands and the current capacity and state of the energy storage unit in real time, as well as real-time receipt of information of the energy storage converter and the battery management system, and send a first command to the energy storage unit controller.
  • the energy storage unit controller is configured to receive the first instruction sent by the energy storage cluster controller and the information sent by the energy storage converter and the battery management system, perform determination, generate a first control signal, and send the first control signal to The energy storage converter performs charge and discharge control.
  • the energy storage converter is configured to receive the first control signal, and perform control protection according to the information of the internal and external devices, and timely send the information of the internal and external devices to the energy storage unit controller.
  • FIG. 1 is a schematic structural view of an energy storage system
  • FIG. 2 is a schematic structural diagram of an energy storage cluster control system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an energy storage cluster control system according to another embodiment of the present invention.
  • the basic idea of the embodiment of the present invention is to adopt a layered distributed design idea, based on the fiber-optic Ethernet technology and the industrial field bus technology, to design and control the communication network of the control system.
  • the energy storage cluster control system of the embodiment of the invention can be applied to an energy storage system in which two or more energy storage units are connected in parallel.
  • Each of the energy storage units can operate independently of each other but is controlled by the upper layer control system.
  • Each energy storage unit comprises a plurality of branches, each of which is composed of a stored energy storage converter (PCS) and a stored energy battery and a battery management system (BMS); the energy storage converter (PCS) realizes charging of the battery.
  • PCS stored energy storage converter
  • BMS battery management system
  • Discharge management, battery management system (BMS) to achieve monitoring of energy storage batteries; each branch can run independently of each other but controlled by the upper layer control system.
  • Fig. 1 exemplarily shows a schematic structural view of an energy storage system.
  • the energy storage system includes generator, high plant change, excitation change, main transformer and No. 1 energy storage unit, No. 2 energy storage unit... No. N energy storage unit.
  • the existing energy storage cluster control system scheme is generally designed for multiple equipments.
  • the control system is connected by multiple traditional control devices. There are multiple data conversion devices in the middle.
  • the real-time and synchronization of the network is poor, which can not meet the frequency modulation of the unit. Fast real-time and synchronization requirements.
  • an embodiment of the present invention provides an energy storage cluster control system for frequency modulation of a power grid generator set.
  • the energy storage cluster control system 20 includes an energy storage cluster controller (ECS) 21, an energy storage unit controller (EMU) 22, an energy storage converter (PCS) 23, and a battery management system (BMS). )twenty four. among them:
  • the energy storage cluster controller 21 is configured to receive the adjusted power value and the frequency modulation control instruction and the current capacity and state of the energy storage unit in real time, receive the information of the energy storage converter 23 and the battery management system 24 in real time, and send the information to the energy storage unit controller. Send the first instruction.
  • the adjusted power value and the FM control command may be sent to the energy storage cluster controller through the automatic power generation control scheduling device.
  • the energy storage unit controller 22 is configured to receive the first instruction sent by the energy storage cluster controller 21 and the information sent by the energy storage converter 23 and the battery management system 24, perform determination, generate a first control signal, and The first control signal is sent to the energy storage converter for charge and discharge control.
  • the energy storage converter 23 is connected to the battery management system 24 and is configured to receive the first control signal and perform control protection according to the information of the internal and external devices, and timely transmit the information of the internal and external devices to the energy storage unit controller 22.
  • the distributed design and reasonable functions of the system are divided into an energy storage cluster controller, an energy storage unit controller, an energy storage converter and a battery management system, which solves how to meet multiple energy storage units in parallel.
  • the platform architecture and the technical problems of fast real-time and synchronization of the genset frequency modulation control requirements have high reliability.
  • the energy storage cluster controller communicates point-to-point with the automatic power generation control dispatch device via fiber optic real-time Ethernet.
  • the embodiment of the invention can ensure the reliability and strong anti-interference of the data transmission under the strong electromagnetic interference environment of the power station site.
  • the energy storage cluster controller is configured with an N-way fiber optic real-time Ethernet interface for communicating with the energy storage unit controller in a point-to-point communication manner.
  • N takes a positive integer.
  • the multi-channel optical real-time Ethernet ensures reliable output transmission. Sex, real-time and synchronism, thus, the time synchronization error of data transmission between N channels is controlled at the microsecond level, and the data delay time is also in the microsecond level.
  • the energy storage unit controller is disposed on the near side of the energy storage cluster controller, and the energy storage unit controller and the energy storage cluster controller are connected by an industrial fieldbus CAN bus.
  • the complexity of the network is reduced, real-time rapid control is realized, and the branches formed by the energy storage unit controller and each energy storage cluster controller are connected to one bus, The time synchronization error of data transmission between the branches is controlled to the millisecond level, and the data delay time is also in the order of milliseconds.
  • the energy storage cluster control system can be divided into three layers, wherein the top layer includes an energy storage cluster controller, the middle layer includes an energy storage unit controller, and the bottom layer includes an energy storage converter and a battery management system.
  • next layer is controlled by the upper layer, and when the upper layer fails, the next layer can keep the instructions received before the fault operate independently.
  • the energy storage cluster control system can be highly reliable.
  • the preferred embodiment adopts a three-layer architecture, which is divided into a top-level centralized control layer, a middle layer-unit control layer, and a bottom layer-device control layer.
  • the top device is an energy storage cluster controller (ECS)
  • the middle device is an energy storage unit controller (EMU) for each energy storage unit
  • the bottom device is a storage energy converter (PCS) and a battery for all energy storage units.
  • Management System (BMS) equipment is an energy storage cluster controller (ECS)
  • ECS energy storage unit controller
  • BMS Management System
  • the ECS and AGC scheduling device performs point-to-point communication through the fiber optic real-time Ethernet LAN-0.
  • the ECS decomposes the instruction according to the adjusted power value and the FM control command issued by the AGC scheduling device, and the current capacity and state uploaded by each energy storage unit in real time, and delivers the decomposed instruction to the middle storage unit controller.
  • the ECS has an N-way fiber-optic real-time Ethernet interface for connecting to the mid-tier EMU, which is connected to each energy storage unit (EMU) via LAN-1 to LAN-N in a point-to-point communication mode.
  • the energy storage unit controller (EMU) of each energy storage unit is arranged in the vicinity of the energy storage cluster controller (PCS) equipment in the energy storage unit, and the energy storage unit controller (EMU) and the energy storage cluster control in the energy storage unit are controlled.
  • the devices (PCS) are connected by an industrial fieldbus CAN bus, and each branch is connected to a bus.
  • ECS energy storage cluster controller
  • the instruction is sent to the bottom energy storage converter (PCS) device for charging and discharging control, and the energy storage cluster controller (EMU) receives and monitors the information of the underlying PCS and BMS of the energy storage unit in real time.
  • the underlying PCS device receives the instructions of the middle layer EMU and controls and protects according to the information of the internal and external devices, and sends the information to the middle layer in time.
  • the layers are controlled from top to bottom and the lower layer has a certain degree of independence, that is, the next layer is controlled by the upper layer, but after the failure of the upper layer, the lower layer can remain in front of the fault.
  • Received instructions operate independently of each other.
  • the embodiment of the present invention adopts the above technical solution to adopt a layered and distributed control system communication network structure design and reasonable function division, and realizes a platform structure of a plurality of energy storage units in parallel energy storage cluster control system; the data transmission distance is long
  • the power station that is susceptible to electromagnetic interference utilizes point-to-point communication mode and uses fiber-optic real-time Ethernet to ensure data transmission reliability, fast real-time and synchronization.
  • the industrial fieldbus CAN bus mode is adopted on the energy storage unit equipment side, which reduces The complexity of the network realizes real-time fast control.
  • the communication delay and synchronization error are controlled in the millisecond level, which is much higher than the control requirement of the unit's FM response time and synchronization, which can meet the unit's primary frequency modulation and secondary frequency modulation. demand.
  • the number of the energy storage cluster controller, the energy storage unit controller, the energy storage converter, and the battery management system is not limited, and any number of energy storage clusters may be controlled in FIG. 2-3. Controller, energy storage unit controller, and energy storage converter and battery management system.

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

Abstract

La présente invention concerne un système de commande de grappe de stockage d'énergie et un système de stockage d'énergie. Un système de commande de grappe de stockage d'énergie (20) est utilisé pour la modulation de fréquence d'un ensemble de génération d'un réseau électrique. Dans le système de commande, un dispositif de commande de grappe de stockage d'énergie (21) est utilisé pour recevoir une valeur de puissance de réglage et une instruction de commande de modulation de fréquence ainsi que la capacité et l'état de courant en temps réel d'une unité de stockage d'énergie, recevoir des informations concernant un transformateur de courant de stockage d'énergie (23) et un système de gestion de batterie (24) en temps réel, et envoyer une première instruction à un dispositif de commande d'unité de stockage d'énergie (22). Le dispositif de commande d'unité de stockage d'énergie est utilisé pour recevoir la première instruction et les informations envoyées par le transformateur de courant de stockage d'énergie et le système de gestion de batterie pour une détermination pour générer un premier signal de commande, et envoyer le premier signal de commande au transformateur de courant de stockage d'énergie pour la commande de charge et de décharge. Le transformateur de courant de stockage d'énergie est utilisé pour recevoir le premier signal de commande, et envoyer les informations concernant des dispositifs internes et externes au dispositif de commande d'unité de stockage d'énergie à temps. Le système de commande de grappe de stockage d'énergie et le système de stockage d'énergie résolvent le problème technique lié à la manière de satisfaire une propriété en temps réel rapide et un synchronisme des exigences de commande de modulation de fréquence d'une architecture de plateforme qui comporte une pluralité d'unités de stockage d'énergie connectées en parallèle et un ensemble de génération.
PCT/CN2017/117279 2016-12-19 2017-12-19 Système de commande de grappe de stockage d'énergie et système de stockage d'énergie Ceased WO2018113683A1 (fr)

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CN201611178084.3A CN106877370A (zh) 2016-12-19 2016-12-19 储能集群控制系统及储能系统
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CN109713705A (zh) * 2019-03-15 2019-05-03 国电联合动力技术有限公司 一种低风速风电机组内置式储能系统及储能方法
CN110071533A (zh) * 2019-05-23 2019-07-30 西安热工研究院有限公司 一种适用于储能辅助发电机组调频的pmu改造系统
CN110445192A (zh) * 2019-08-26 2019-11-12 华润智慧能源有限公司 一种调频方法、装置、系统、设备及存储介质
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CN109412185A (zh) * 2018-12-17 2019-03-01 万克能源科技有限公司 一种提高电厂agc调频性能的储能装置、控制系统及控制方法
CN109713705A (zh) * 2019-03-15 2019-05-03 国电联合动力技术有限公司 一种低风速风电机组内置式储能系统及储能方法
CN110071533A (zh) * 2019-05-23 2019-07-30 西安热工研究院有限公司 一种适用于储能辅助发电机组调频的pmu改造系统
CN110445192A (zh) * 2019-08-26 2019-11-12 华润智慧能源有限公司 一种调频方法、装置、系统、设备及存储介质
CN110571869A (zh) * 2019-10-12 2019-12-13 上海豫源电力科技有限公司 一种用于储能调频系统的信号测量方法
CN110571869B (zh) * 2019-10-12 2021-05-28 傲普(上海)新能源有限公司 一种用于储能调频系统的信号测量方法
CN110970914A (zh) * 2019-11-26 2020-04-07 力神动力电池系统有限公司 一种具有安全保护功能的储能系统
CN112510743A (zh) * 2020-12-15 2021-03-16 西安奇点能源技术有限公司 一种储能变流器
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CN113131504A (zh) * 2021-05-24 2021-07-16 上海采日能源科技有限公司 集群式储能系统
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CN115117909A (zh) * 2022-08-04 2022-09-27 华能陇东能源有限责任公司 一种参与电网调节的储能聚合体的确定方法及存储介质
CN115065085A (zh) * 2022-08-05 2022-09-16 中国华能集团清洁能源技术研究院有限公司 多支路电池系统的控制系统和方法
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