WO2017185756A1 - Système de charge de simulation interactive d'automobile électrique et de réseau électrique et procédé de protection électrique associé - Google Patents

Système de charge de simulation interactive d'automobile électrique et de réseau électrique et procédé de protection électrique associé Download PDF

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Publication number
WO2017185756A1
WO2017185756A1 PCT/CN2016/108794 CN2016108794W WO2017185756A1 WO 2017185756 A1 WO2017185756 A1 WO 2017185756A1 CN 2016108794 W CN2016108794 W CN 2016108794W WO 2017185756 A1 WO2017185756 A1 WO 2017185756A1
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WO
WIPO (PCT)
Prior art keywords
grid
module
monitoring terminal
battery
bidirectional
Prior art date
Application number
PCT/CN2016/108794
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English (en)
Chinese (zh)
Inventor
贺一之
赵明宇
储毅
张卫国
庞松岭
林道鸿
谢振超
邓育强
李香龙
刘秀兰
曾爽
Original Assignee
国电南瑞科技股份有限公司
国电南瑞南京控制系统有限公司
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Publication date
Application filed by 国电南瑞科技股份有限公司, 国电南瑞南京控制系统有限公司 filed Critical 国电南瑞科技股份有限公司
Publication of WO2017185756A1 publication Critical patent/WO2017185756A1/fr

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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
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • 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
    • 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
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network

Definitions

  • the invention relates to an electric vehicle and grid interaction simulation load system and an electric protection method thereof, and belongs to the field of interaction between an electric vehicle and a power grid.
  • V2G Vehicle to Grid
  • V2G Vehicle to Grid
  • the electric vehicle as a mobile energy storage element realizes the bidirectional exchange of energy and information with the grid under controlled conditions.
  • V2G technology can realize power factor correction and energy bidirectional flow, which not only can filter out harmonic pollution, but also improve the stability and reliability of the power grid.
  • the development of electric vehicles has led to rapid development of battery storage methods.
  • V2G-based charging and discharging facilities still have problems such as low safety and reliability, single function, and high price.
  • the present invention provides an electric vehicle and grid interactive analog load system and an electrical protection method thereof.
  • An electric vehicle and a grid interactive analog load system comprising a battery system, a bidirectional AC/DC module, a grid connection control protection module and a monitoring terminal;
  • the battery system comprises a battery and a battery management system connected to the battery, wherein the monitoring terminal respectively Connected to a battery management system, a bidirectional AC/DC module, and a grid connection control protection module, the battery management system is also coupled to a bidirectional AC/DC module, the bidirectional AC/DC module being connected to the grid via a circuit breaker, the bidirectional AC The /DC module is also connected to the grid-connected control protection module, which is connected to the grid through a circuit breaker.
  • An electrical protection method for an electric protection method for an electric vehicle and a grid interactive simulation load system comprising the following steps,
  • Step 1 The battery management system measures the total charge current and SOC conditions and will The measured value is sent to the monitoring terminal;
  • Step 2 The monitoring terminal determines whether the total charging current exceeds a preset overcurrent protection threshold. If yes, the internal terminal is determined to be an internal fault, and the monitoring terminal issues a trip command to the grid-connected protection module to cut off the circuit breaker and exit the process; otherwise, go to step 3. ;
  • Step 3 The monitoring terminal determines whether the SOC condition exceeds a preset SOC working interval, and if so, the monitoring terminal issues a trip command to the grid-connected protection module, cuts off the circuit breaker, and exits the process; otherwise, proceeds to step 4;
  • Step 4 The bidirectional AC/DC module measures the input three-phase voltage, and sends the measured value to the monitoring terminal;
  • Step 5 The monitoring terminal measures the magnitude of the single-phase power, determines whether the three-phase voltage is sent to be distorted, and if yes, proceeds to step 6, otherwise, external protection is performed, that is, the monitoring terminal issues a trip command to the grid-connected protection module to cut off the circuit breaker. And issue an island signal to exit the process;
  • Step 6 determine whether to use the composite voltage to initiate overcurrent protection, if yes, go to step 7, otherwise exit the process;
  • Step 7 determine whether there is a sudden change in current or negative sequence current, if yes, the grid-connected control module voltage transformer disconnected, exit the process; otherwise, go to step 8;
  • step 8 it is judged whether the active power is reduced or over-limited. If yes, the monitoring terminal issues a trip command to the grid-connected protection module, cuts off the circuit breaker, and issues an island signal.
  • the trip command is issued after a delay of several seconds.
  • the invention achieves the beneficial effects achieved by the invention: the invention solves the electrical safety problem of the device itself during the simulated load working process and the grid connection safety problem when accessing the power grid, improves the safety of the device itself, and at the same time, monitors the SOC state of the battery. It is beneficial to improve the life of the battery and is beneficial to the promotion and application of the energy storage system in the V2G process.
  • Figure 1 shows the block diagram of the V2G analog load system.
  • FIG. 2 is a flow chart of an electrical protection method.
  • an electric vehicle interacts with a power grid to simulate a load system, including a battery system (PACK), a two-way AC/DC module, a grid-connected control protection module, and a monitoring terminal; wherein the battery system includes a battery and is connected to the battery.
  • Battery Management System (BMS) grid-connected control protection module is mainly responsible for over-current protection, over-voltage protection and island protection.
  • connection relationship of each component is as follows:
  • the monitoring terminal is respectively connected with the battery management system, the bidirectional AC/DC module and the grid connection control protection module, the battery management system is also connected with the bidirectional AC/DC module, the bidirectional AC/DC module is connected to the grid through the circuit breaker, and the bidirectional AC/DC module It is also connected to the grid-connected control protection module, and the grid-connected control protection module is connected to the grid through a circuit breaker.
  • the electrical protection method of the above system includes the following steps:
  • Step 1 The battery management system measures the total charging current and the SOC condition, and transmits the measured value to the monitoring terminal.
  • Step 2 The monitoring terminal determines whether the total charging current exceeds a preset overcurrent protection threshold. If yes, the internal terminal is determined to be an internal fault, and the monitoring terminal issues a trip command to the grid-connected protection module to cut off the circuit breaker and exit the process; otherwise, go to step 3. .
  • Step 3 The monitoring terminal determines whether the SOC condition exceeds a preset SOC working interval. If yes, the monitoring terminal issues a trip command to the grid-connected protection module, cuts off the circuit breaker, and exits the process; otherwise, proceeds to step 4.
  • Step 4 The bidirectional AC/DC module measures the input three-phase voltage and transmits the measured value to the monitoring terminal.
  • Step 5 The monitoring terminal measures the magnitude of the single-phase power, determines whether the three-phase voltage is sent to be distorted, and if yes, proceeds to step 6, otherwise, external protection is performed, that is, the monitoring terminal issues a trip command to the grid-connected protection module to cut off the circuit breaker. And send out an island signal to exit the process.
  • step 6 it is determined whether the composite voltage is used to initiate overcurrent protection. If yes, go to step 7, otherwise exit the process.
  • step 7 it is determined whether a current sudden change or a negative sequence ground current occurs. If yes, the grid-connected control module voltage transformer is disconnected, and the process is exited; otherwise, the process proceeds to step 8.
  • step 8 it is judged whether the active power is reduced or over-limited. If yes, the monitoring terminal issues a trip command to the grid-connected protection module, cuts off the circuit breaker, and issues an island signal.
  • the trip command is issued after a delay of several seconds to avoid protection from malfunction, and an alarm will be issued when internal or external faults occur.
  • the invention solves the electrical safety problem of the device itself during the simulated load working process and the grid-connected safety problem when the power is connected to the grid, and improves the safety of the device itself.
  • monitoring the SOC state of the battery is beneficial to improving the life of the battery, which is beneficial to Popularization and application of energy storage systems in V2G process.

Abstract

La présente invention concerne un système de charge de simulation interactive d'automobile électrique et de réseau électrique, et un procédé de protection électrique associé. Le système comprend un système de batterie, un module CA/CC bidirectionnel, un module de protection de commande connecté au réseau et un terminal de surveillance, le système de batterie comprenant une batterie et un système de gestion de batterie connecté à la batterie ; le terminal de surveillance est connecté au système de gestion de batterie, au module CA/CC bidirectionnel et au module de protection de commande connecté au réseau, respectivement ; le système de gestion de batterie est en outre connecté au module CA/CC bidirectionnel ; le module CA/CC bidirectionnel est connecté à un réseau électrique par l'intermédiaire d'un disjoncteur ; le module CA/CC bidirectionnel est en outre connecté au module de protection de commande connecté au réseau ; et le module de protection de commande connecté au réseau est connecté à un réseau électrique par l'intermédiaire d'un disjoncteur. Le problème de sécurité électrique d'un dispositif pendant un processus de fonctionnement de charge de simulation et le problème de sécurité connecté au réseau lors de l'accès à un réseau électrique sont résolus, et la sécurité du dispositif est améliorée.
PCT/CN2016/108794 2016-04-26 2016-12-07 Système de charge de simulation interactive d'automobile électrique et de réseau électrique et procédé de protection électrique associé WO2017185756A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610266745.1 2016-04-26
CN201610266745.1A CN105811444B (zh) 2016-04-26 2016-04-26 一种电动汽车与电网互动模拟负载系统及其电气保护方法

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WO2017185756A1 true WO2017185756A1 (fr) 2017-11-02

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WO (1) WO2017185756A1 (fr)

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CN105811444B (zh) * 2016-04-26 2018-08-14 海南电网有限责任公司 一种电动汽车与电网互动模拟负载系统及其电气保护方法

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JP2002252928A (ja) * 2001-02-26 2002-09-06 Miki Denki Kk 分散電源システム及びその制御・保護装置
CN101814765A (zh) * 2010-04-06 2010-08-25 中国电力科学研究院 电动汽车双向充电机电源控制系统
CN101931238A (zh) * 2010-04-29 2010-12-29 浙江省电力试验研究院 基于主从策略的微网系统协调控制方法
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CN104767220A (zh) * 2015-04-14 2015-07-08 扬州大学 并网运行模式和独立运行模式切换的前馈控制方法
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