CN102280903B - V2G intelligent charging and discharging system - Google Patents
V2G intelligent charging and discharging system Download PDFInfo
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- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
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- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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- 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
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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- 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
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
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Abstract
Description
技术领域 technical field
本发明涉及一种电动车充放电系统，尤其是涉及一种V2G智能充放电系统。The invention relates to an electric vehicle charging and discharging system, in particular to a V2G intelligent charging and discharging system.
背景技术 Background technique
V2G(电动汽车入网或车辆到电网)描述的是一种新型电网技术，电动汽车不仅作为用户和电力消费体，同时，在电动汽车闲置状态时作为绿色移动储能单元接入电网为电网提供电力，实现电动车辆的能量在受控状态下实现与电网之间的双向互动和交换。V2G (electric vehicle grid or vehicle to grid) describes a new grid technology. Electric vehicles not only serve as users and power consumers, but also connect to the grid as green mobile energy storage units to provide power for the grid when electric vehicles are idle. , to realize the two-way interaction and exchange between the energy of the electric vehicle and the grid under control.
近年来，随着纯电动汽车技术和动力锂离子电池技术的迅速发展，大规模集中式充电站已经开始出现。2008年北京市奥运会期间建设了国内第一个集中式充电站，可满足50辆纯电动大巴车的动力电池充电需求。2010年上海世博会提供了可供120辆纯电动大巴车充电的集中式充电站。北京市规划2010年再建设4个与奥运会充电站同等规模的充电站。其他进入“十城千辆”计划的城市，如大连、深圳、南昌等，都在规划建设集中式充电站。In recent years, with the rapid development of pure electric vehicle technology and power lithium-ion battery technology, large-scale centralized charging stations have begun to appear. During the 2008 Beijing Olympic Games, the first centralized charging station in China was built, which can meet the power battery charging needs of 50 pure electric buses. The 2010 Shanghai World Expo provided a centralized charging station for 120 pure electric buses. In 2010, Beijing plans to build four more charging stations with the same scale as the Olympic charging stations. Other cities that have entered the "Ten Cities, Thousand Vehicles" plan, such as Dalian, Shenzhen, Nanchang, etc., are planning to build centralized charging stations.
随着电动汽车的推广应用和充电站的建设，人们对电动汽车和充电站的认识已经不仅仅局限在代步工具和“加油站”上，而是希望开拓更广泛的应用。With the promotion and application of electric vehicles and the construction of charging stations, people's understanding of electric vehicles and charging stations is not limited to transportation tools and "gas stations", but hopes to develop a wider range of applications.
虽然目前国内外运行和正在建设的充电站，多数只具有为电动汽车供给能源的单一功能，国内没有相关的V2G示范项目，也没有公开发表的资料、论文。Although most of the charging stations currently in operation and under construction at home and abroad only have a single function of supplying energy for electric vehicles, there are no related V2G demonstration projects in China, and there are no published materials and papers.
国外，美国、德国等国家已经在进行V2G(Vehicle to Grid)相关技术的研究，但大部分都处在理论和实验阶段。Abroad, the United States, Germany and other countries are already conducting research on V2G (Vehicle to Grid) related technologies, but most of them are still in the theoretical and experimental stages.
发明内容 Contents of the invention
本发明的目的就是为了克服上述现有技术存在的缺陷而提供一种可实现电动车辆的能量在受控状态下与电网之间的双向互动和交换、节能环保的V2G智能充放电系统。The purpose of the present invention is to provide a V2G intelligent charging and discharging system capable of realizing energy-saving and environment-friendly two-way interaction and exchange between the energy of the electric vehicle and the power grid in a controlled state in order to overcome the above-mentioned defects in the prior art.
本发明的目的可以通过以下技术方案来实现：The purpose of the present invention can be achieved through the following technical solutions:
一种V2G智能充放电系统，其特征在于，包括监控中心、后台管理子系统、智能电表、双向智能充放电装置、充放电终端、电动车、变压器、电网，所述的监控中心与后台管理子系统连接，所述的双向智能充放电装置分别与后台管理子系统、智能电表、充放电终端连接，所述的充放电终端与电动车连接，所述的智能电表与变压器连接，所述的变压器与电网连接。A V2G intelligent charging and discharging system, characterized in that it includes a monitoring center, a background management subsystem, a smart meter, a bidirectional intelligent charging and discharging device, a charging and discharging terminal, an electric vehicle, a transformer, and a power grid, and the monitoring center and the background management subsystem System connection, the two-way intelligent charging and discharging device is respectively connected with the background management subsystem, the smart meter, and the charging and discharging terminal, the charging and discharging terminal is connected with the electric vehicle, the smart meter is connected with the transformer, and the transformer Connect to grid.
所述的双向智能充放电装置包括全控三相高频整流/逆变模块和全控桥双向DC/DC变换模块，所述的全控三相高频整流/逆变模块的一端与变压器连接，另一端与全控桥双向DC/DC变换模块连接，所述的全控桥双向DC/DC变换模块与充放电终端连接。The bidirectional intelligent charging and discharging device includes a fully-controlled three-phase high-frequency rectification/inversion module and a fully-controlled bridge bidirectional DC/DC conversion module, and one end of the fully-controlled three-phase high-frequency rectification/inversion module is connected to a transformer , and the other end is connected to the fully-controlled bridge bidirectional DC/DC conversion module, and the fully-controlled bridge bidirectional DC/DC conversion module is connected to the charging and discharging terminal.
所述的电动车辆设有车载电池管理子系统，该车载电池管理子系统通过第一CAN总线将电池当前端电压、电池当前SOC值、电池最优充放电电流及持续时间、最大充放电电流及持续时间、充电电压最高限值、放电电压最低限值、充放电允许/禁止状态、电池容量、故障状态发送给双向智能充放电装置，该双向智能充放电装置将本装置的最大输出电压、最大输出电流、可用状态、连接状态、充放电SOC上下限值发送给车载电池管理子系统。The electric vehicle is provided with a vehicle-mounted battery management subsystem, and the vehicle-mounted battery management subsystem transmits the current terminal voltage of the battery, the current SOC value of the battery, the optimal charging and discharging current and duration of the battery, the maximum charging and discharging current and Duration, the maximum charging voltage limit, the minimum discharge voltage limit, charging and discharging allowed/prohibited status, battery capacity, and fault status are sent to the bidirectional intelligent charging and discharging device. The output current, availability status, connection status, charge and discharge SOC upper and lower limits are sent to the on-board battery management subsystem.
所述的双向智能充放电装置通过第一以太网将当前已连接车辆信息、充放电装置当前状态信息、充/放电电压电流值、当前已运行时间、当前用户信息发送给后台管理子系统，该后台管理子系统将充放电指令、电价信息、对时指令发送给双向智能充放电装置。The bidirectional intelligent charging and discharging device sends the currently connected vehicle information, the current status information of the charging and discharging device, the charging/discharging voltage and current value, the current elapsed running time, and the current user information to the background management subsystem through the first Ethernet. The background management subsystem sends charging and discharging instructions, electricity price information, and time synchronization instructions to the two-way intelligent charging and discharging device.
所述的充放电终端可设定两种模式，为V2G模式、充电模式。The charging and discharging terminal can be set in two modes, V2G mode and charging mode.
所述的双向智能充放电装置通过第二CAN总线将用户信息、充/放电电量信息、电价信息、已充/放电时间、当前工作模式、所有设备状态信息、当前充放电电压电流大小、通信状态等信息发送给充放电终端，该充放电终端将V2G模式下用户设置的参数信息和交互指令或充电模式下的交互指令发送给双向智能充放电装置。The bidirectional intelligent charging and discharging device transmits user information, charging/discharging power information, electricity price information, charged/discharging time, current working mode, all equipment status information, current charging and discharging voltage and current, and communication status through the second CAN bus. and other information are sent to the charging and discharging terminal, and the charging and discharging terminal sends the parameter information and interactive instructions set by the user in the V2G mode or the interactive instructions in the charging mode to the two-way intelligent charging and discharging device.
所述的双向智能充放电装置通过485总线与智能电表连接，获取8段充放电电量。The two-way intelligent charging and discharging device is connected to the smart meter through the 485 bus to obtain 8 stages of charging and discharging electricity.
所述的后台管理子系统通过第二以太网将所辖区域内的可用车辆电池容量、充放电状态、充放电电量发送给监控中心，该监控中心将充放电指令、对时指令发送给后台管理子系统。The background management subsystem sends the available vehicle battery capacity, charging and discharging status, and charging and discharging power in the area under its jurisdiction to the monitoring center through the second Ethernet, and the monitoring center sends the charging and discharging instructions and time synchronization instructions to the background management subsystem.
所述的车辆信息包括电池容量、当前SOC值、电池最优充放电电流及持续时间、最大充放电电流及持续时间、充电电压最高限值、放电电压最低限值、充放电允许/禁止状态、故障信息。The vehicle information includes battery capacity, current SOC value, battery optimal charge and discharge current and duration, maximum charge and discharge current and duration, maximum charge voltage limit, discharge voltage minimum limit, charge and discharge allow/disable status, accident details.
与现有技术相比，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
1、可实现电动车辆的能量在受控状态下与电网之间的双向互动和交换；1. It can realize the two-way interaction and exchange between the energy of electric vehicles and the grid under control;
2、双向智能充放电装置可采用手动、远程、本地自动等控制方式；具有本地存储分时段工作模式功能和演示功能；2. The two-way intelligent charging and discharging device can adopt manual, remote, local automatic and other control methods; it has the function of local storage and time-segmented working mode and demonstration function;
3、后台系统获取电网调度指令、进行充放电决策、下发充放电指令，实现电动车辆与电网的互动；3. The background system obtains grid dispatching instructions, makes charging and discharging decisions, and issues charging and discharging instructions to realize the interaction between electric vehicles and the grid;
4、系统可工作在充电模式和V2G模式，节能环保：4. The system can work in charging mode and V2G mode, energy saving and environmental protection:
充电模式下可设置充电时间(立即充电、预约充电)和充电方式(自动充满、定时间和定电量)；In the charging mode, the charging time (immediate charging, reserved charging) and charging method (automatic charging, fixed time and fixed power) can be set;
V2G模式下，可根据用户在充放电终端上选择的车辆SOC上下限、参与时间，自动完成车辆与电网间在设置的SOC上下限范围内的能量双向流动，在保障了用户的基本使用需求的同时，可实现电动车辆与电网间的信息交互和能量互动。In V2G mode, according to the vehicle SOC upper and lower limits and participation time selected by the user on the charging and discharging terminal, the two-way energy flow between the vehicle and the grid within the set SOC upper and lower limits can be automatically completed, ensuring the user's basic usage needs. At the same time, information interaction and energy interaction between electric vehicles and the grid can be realized.
附图说明 Description of drawings
图1为本发明的结构示意图；Fig. 1 is a structural representation of the present invention;
图2为本发明的拓扑结构示意图。Fig. 2 is a schematic diagram of the topology structure of the present invention.
具体实施方式 Detailed ways
下面结合附图和具体实施例对本发明进行详细说明。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
如图1、图2所示，一种V2G智能充放电系统，包括监控中心1、后台管理子系统2、智能电表3、双向智能充放电装置4、充放电终端5、电动车6、变压器7、电网8，所述的监控中心1与后台管理子系统2连接，所述的双向智能充放电装置4分别与后台管理子系统2、智能电表3、充放电终端5连接，所述的充放电终端5与电动车6连接，所述的智能电表3与变压器7连接，所述的变压器7与电网8连接。As shown in Figure 1 and Figure 2, a V2G intelligent charging and discharging system includes a monitoring center 1, a background management subsystem 2, a smart meter 3, a bidirectional intelligent charging and discharging device 4, a charging and discharging terminal 5, an electric vehicle 6, and a transformer 7 , the power grid 8, the monitoring center 1 is connected to the background management subsystem 2, the two-way intelligent charging and discharging device 4 is respectively connected to the background management subsystem 2, the smart meter 3, and the charging and discharging terminal 5, and the charging and discharging The terminal 5 is connected to the electric vehicle 6 , the smart meter 3 is connected to the transformer 7 , and the transformer 7 is connected to the grid 8 .
各组件的功能如下：The functions of each component are as follows:
监控中心1：数据采集与监视控制，监测电网负荷状态，提供调度指令；Monitoring center 1: data acquisition and monitoring control, monitoring the load status of the power grid, and providing dispatching instructions;
后台管理子系统2：用于实现对双向智能充放电装置4进行管理、充放电策略控制、向监控中心1系统提供所管辖区域内可充放电容量等信息。Background management subsystem 2: used to manage the two-way intelligent charging and discharging device 4, control the charging and discharging strategy, and provide the monitoring center 1 system with information such as the chargeable and discharging capacity in the area under its jurisdiction.
双向智能充放电装置4：用于实现充电状态下的交流至直流和放电状态下的直流至交流的功率变换。Bi-directional intelligent charging and discharging device 4: used to realize power conversion from AC to DC in charging state and DC to AC in discharging state.
充放电终端5：用于实现人机交互、身份识别、充放电状态显示、充放电启/停控制、计量计费、充放电插头管理、票据打印等功能；Charging and discharging terminal 5: used to realize functions such as human-computer interaction, identity recognition, charging and discharging status display, charging and discharging start/stop control, metering and billing, charging and discharging plug management, and bill printing;
智能电表3：双向多时段计量、本地信息存储，与双向智能充放电装置4双向通信。Smart meter 3: two-way multi-time metering, local information storage, two-way communication with two-way smart charging and discharging device 4.
如图2所示，为本发明实施方案系统拓扑图，其功率变换部分主要由双向智能充放电装置4实现。As shown in FIG. 2 , it is a system topology diagram of the embodiment of the present invention, and its power conversion part is mainly realized by a bidirectional intelligent charging and discharging device 4 .
(1)功率变换功能实现(1) Realization of power conversion function
双向智能充放电装置4采用模块化设计，主要包括全控三相高频整流/逆变模块和全控桥双向DC/DC变换模块。The bidirectional intelligent charging and discharging device 4 adopts a modular design, mainly including a fully-controlled three-phase high-frequency rectification/inversion module and a fully-controlled bridge bidirectional DC/DC conversion module.
网侧采用全控三相高频整流/逆变模块接入电网，该模块可四象限运行，既可以从电网吸收有功，经全控桥双向DC/DC变换模块变换后给电池充电，也可将电池能量回馈到电网。具有节能，输入功率因数高，电流谐波畸变率低等特点。AC/DC功率单元控制目标就是要实现双向DC/DC环节输入直流电压的稳定，本方案AC/DC功率模块采用了三个单相AC/DC全桥高频整流电路，由于单相桥的直流电压利用率可以达到1，直流母线电压控制在DC380V左右。三个AC/DC模块只是在DC/DC充放电运行的时候维持直流母线的电压稳定，均流控制(或均功率)由后级DC/DC模块实现。The grid side uses a fully-controlled three-phase high-frequency rectifier/inverter module to connect to the grid. This module can operate in four quadrants. It can absorb active power from the grid and charge the battery after conversion by the fully-controlled bridge bidirectional DC/DC conversion module. Feed battery energy back to the grid. It has the characteristics of energy saving, high input power factor, and low current harmonic distortion rate. The control goal of the AC/DC power unit is to realize the stability of the input DC voltage of the bidirectional DC/DC link. The AC/DC power module of this scheme adopts three single-phase AC/DC full-bridge high-frequency rectification circuits. The voltage utilization rate can reach 1, and the DC bus voltage is controlled at about DC380V. The three AC/DC modules only maintain the voltage stability of the DC bus when the DC/DC is charging and discharging, and the current sharing control (or power sharing) is realized by the subsequent DC/DC module.
当车载动力电池充电时，AC/DC从电网吸收有功功率以维持DC/DC输出直流电压的稳定，当蓄电池能量通过DC/DC向外释放时，AC/DC模块为稳定DC/DC输入端口的DC电压将自动转入逆变工作模式，将蓄电池能量释放到电网中。When the vehicle power battery is charging, the AC/DC absorbs active power from the grid to maintain the stability of the DC/DC output DC voltage. When the battery energy is released through the DC/DC, the AC/DC module stabilizes the DC/DC input port. The DC voltage will automatically switch to the inverter mode to release the battery energy to the grid.
为实现大容量应用，DC/DC部分采取多模块并联运行扩容，各模块之间自动均流。每个直流模块容量为10kW，对于本方案30kW的应用采用3个DC/DC模块并联运行扩容。三个DC/DC模块的输入/输出均并联在一起，各模块之间的均流控制由DC模块内部的均流控制电路完成，电流不均衡度小于5％。DC/DC模块采用高频软开关技术提高效率，每个模块内部具有独立的数模混合控制电路，功能相对独立，单个模块运行故障时可单独闭锁保护，不影响其它模块的正常运行。可构成N+1冗余系统。In order to achieve large-capacity applications, the DC/DC part adopts multi-module parallel operation for capacity expansion, and automatic current sharing between modules. The capacity of each DC module is 10kW. For the 30kW application of this scheme, three DC/DC modules are used in parallel to expand the capacity. The input/output of the three DC/DC modules are all connected in parallel, and the current sharing control among the modules is completed by the current sharing control circuit inside the DC module, and the current imbalance is less than 5%. The DC/DC module adopts high-frequency soft switching technology to improve efficiency. Each module has an independent digital-analog hybrid control circuit with relatively independent functions. When a single module fails to operate, it can be individually blocked for protection without affecting the normal operation of other modules. It can form N+1 redundant system.
(2)通信功能实现(2) Realization of communication function
1)双向智能充放电装置4与车载电池管理子系统61信息交互功能实现1) Realization of the information interaction function between the two-way intelligent charging and discharging device 4 and the on-board battery management subsystem 61
双向智能充放电装置4与车载电池管理子系统61采用CAN通讯，了解车辆(电池)当前状况，获取电池是否允许充/放电、当前SOC值，当前端电压、最优充/放电电流及持续时间、最大充/放电电流及持续时间；双向智能充放电装置4将其设备信息(最大输出电压、最大输出电流、可用状态、连接状态)、充放电SOC上下限值传送至车载电池管理子系统61；车载电池管理子系统61将电池信息(充放电允许/禁止状态、电池当前端电压、当前SOC值、最优/最大充放电电流及持续时间、充电电压最高限值、放电电压最低限值、电池容量)传送至双向智能充放电装置4；The two-way intelligent charging and discharging device 4 and the on-board battery management subsystem 61 use CAN communication to understand the current status of the vehicle (battery), obtain whether the battery is allowed to charge/discharge, the current SOC value, the current terminal voltage, the optimal charge/discharge current and duration , maximum charging/discharging current and duration; the two-way intelligent charging and discharging device 4 transmits its equipment information (maximum output voltage, maximum output current, available status, connection status), charging and discharging SOC upper and lower limits to the on-board battery management subsystem 61 The on-board battery management subsystem 61 will battery information (charging and discharging permission/forbidden state, battery current terminal voltage, current SOC value, optimal/maximum charging and discharging current and duration, charging voltage maximum limit, discharge voltage minimum limit, battery capacity) is sent to the two-way intelligent charging and discharging device 4;
2)双向智能充放电装置4与后台管理子系统2信息交互功能实现2) Realization of the information interaction function between the two-way intelligent charging and discharging device 4 and the background management subsystem 2
双向智能充放电装置4与后台管理子系统2采用以太网通信，获取充放电指令、电价信息、对时指令；双向智能充放电装置4将当前已连接车辆电池信息、设备信息(包括设备状态(充电、放电、待机、停机、故障等)、充/放电电压电流值、当前已运行时间、当前用户信息等)传送至后台管理系统；双向智能充放电装置4根据车辆电池当前SOC进行充、放电操作，实现能量的双向流动The two-way intelligent charging and discharging device 4 and the background management subsystem 2 adopt Ethernet communication to obtain charging and discharging instructions, electricity price information, and timing instructions; Charging, discharging, standby, shutdown, failure, etc.), charging/discharging voltage and current values, current elapsed running time, current user information, etc.) are transmitted to the background management system; two-way intelligent charging and discharging device 4 performs charging and discharging according to the current SOC of the vehicle battery operation to achieve bi-directional flow of energy
3)双向智能充放电装置4与充放电终端5信息交互功能实现3) Realization of the information interaction function between the two-way intelligent charging and discharging device 4 and the charging and discharging terminal 5
双向智能充放电装置4与充放电终端5采用CAN通信，充放电终端5将V2G模式下用户设置的参数信息(SOC上下限设置值、参与时间等)或充电模式下交互指令(充电时间选择、充电方式选择、终止充/放电、启动充电、结帐指令)传送至双向智能充放电装置4；双向智能充放电装置4将用户信息、充/放电电量信息、电价信息、已充/放电时间、当前工作模式、设备状态等信息传送至充放电终端5进行显示。The two-way intelligent charging and discharging device 4 and the charging and discharging terminal 5 adopt CAN communication, and the charging and discharging terminal 5 transmits the parameter information set by the user in the V2G mode (SOC upper and lower limit setting values, participation time, etc.) or the interactive commands in the charging mode (charging time selection, Charging mode selection, charging/discharging termination, starting charging, checkout instructions) are transmitted to the bidirectional intelligent charging and discharging device 4; Information such as the current working mode and device status is transmitted to the charging and discharging terminal 5 for display.
4)双向智能充放电装置4与智能电表3信息交互功能实现4) Realization of the information interaction function between the two-way intelligent charging and discharging device 4 and the smart meter 3
双向智能充放电装置4与智能电表3采用485通信，定时获取电表数据，电能计量采用双向多段计量(充、放电电量均分为4段进行计量，并对应4段电价)；The two-way intelligent charging and discharging device 4 communicates with the smart meter 3 through 485 communication, regularly obtains the meter data, and uses two-way multi-stage metering for electric energy measurement (charging and discharging power is divided into 4 stages for measurement, and corresponds to 4 stages of electricity prices);
(3)后台管理子系统2控制功能实现(3) Realization of the control function of background management subsystem 2
后台管理子系统2与监控中心1采用以太网通信，获取监控中心1充放电指令、对时指令等信息，并将所辖区域内可用车辆电池容量、充放电状态、充放电电量等信息传送至监控中心1；The background management subsystem 2 communicates with the monitoring center 1 through Ethernet to obtain information such as charging and discharging instructions and time synchronization instructions from the monitoring center 1, and transmits information such as the available vehicle battery capacity, charging and discharging status, and charging and discharging power in the area under its jurisdiction to the Monitoring center 1;
后台管理子系统2根据监控中心1下发的充放电指令，根据接入车辆的信息，决策参与V2G车辆并进行功率分配。The background management subsystem 2 decides to participate in V2G vehicles and distribute power according to the charging and discharging instructions issued by the monitoring center 1 and the information of the connected vehicles.
从技术上讲，V2G可实现与电网的友好互动，是先进的通信、IT、能源、新材料、传感器等产业的集成，也是配电网技术、网络技术、通信技术、传感器技术、电力电子技术、储能技术的综合应用，是推动智能电网发展的重要组成。Technically speaking, V2G can achieve friendly interaction with the power grid. It is the integration of advanced communication, IT, energy, new materials, sensors and other industries. , The comprehensive application of energy storage technology is an important part of promoting the development of smart grid.
含有分布式储能单元的V2G具有与大电网互补、可缓解电网供电紧张和提高电网可靠性等优点。随着技术的发展，V2G还可进一步降低电力系统的投资和运营成本，超大型的电站与分散微型电站的结合可以降低在输配电线路上的投资，提高电力系统运行的安全性和经济性。特别地，与众多的分布式电源相比，V2G最大的优势是，当大电网出现大面积停电事故时，V2G仍能保持正常运行，由此可提高电力系统的抗灾能力。V2G with distributed energy storage units has the advantages of complementing the large power grid, alleviating the power supply tension of the power grid, and improving the reliability of the power grid. With the development of technology, V2G can further reduce the investment and operating costs of the power system. The combination of super large power stations and scattered micro power stations can reduce the investment in transmission and distribution lines and improve the safety and economy of power system operation. In particular, compared with many distributed power sources, the biggest advantage of V2G is that when a large-scale power outage occurs in a large power grid, V2G can still maintain normal operation, thereby improving the disaster resistance of the power system.
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