电动汽车快速充电站的储能缓冲系统控制策略

摘要

By using the energy storage buffer system, we can compensate the pulse power of fast charging electric vehicles (EV) and reduce the adverse influence on the distribution network caused by the fast charging stations. This paper studies the topology structure of fast charging station with energy storage buffer system and the fast charging power characteristics of different types of batteries. Then taking the distribution network real power change limit into account, we propose an operation mode of the energy storage buffer system of the fast charging stations and its current control strategy. Furthermore, to design the storage buffer system module and its control parameters, we combine the configuration of fast charging stations to deduce the operation parameters of the storage buffer system. Using Matlab/Simulink software, we build a model of fast charging station with energy storage buffer system, analyze the dynamic characteristics of fast charging station with different pulse charging power, and verify the correctness and effectiveness of the control strategy. This work is supported by National Natural Science Foundation of China (No. 51277184).%利用储能缓冲系统补偿电动汽车快速充电的脉冲功率，能够减小快速充电站接入对配电网的不利影响。研究含储能缓冲系统的快速充电站结构、不同类型蓄电池的快速充电功率特性，提出计及配电网有功变化率限值的储能缓冲系统运行方式和电流控制策略。结合快速充电站配置，推导储能缓冲系统的运行参数，进而设计储能系统元件参数。利用Matlab/Simulink搭建含储能缓冲系统的快速充电站模型，分析不同电动汽车脉冲充电功率下储能缓冲系统动态特性，验证了所提出控制策略的正确性和有效性。