一种基于MMC的电动汽车充放电系统及其稳态运行研究  

Research on the Charging and Discharging System for EVs Based on MMC and Its Steady-State Operation

作　　者：尹忠东[1] 闫卓武 石静[1] 孙福鹏 王贵罡 YIN Zhongdong;YAN Zhuowu;SHI Jing;SUN Fupeng;WANG Guigang(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources （North China Electrical Power University）, Beijing 102206;Qingdao TGOOD Electric Co., Ltd., Qingdao 266104, Shandong, China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]特锐德电气股份有限公司,山东青岛266104

出　　处：《电网与清洁能源》2018年第1期101-108,共8页Power System and Clean Energy

基　　金：国家重点研发计划重点专项(2016YFB0101900);中国电力科学研究院科技创新基金(YD83-17-002)~~

摘　　要：针对特定场合下规模化电动汽车集中充放电需求以及由此引起的电网三相不平衡、并网谐波含量高等问题,提出了一种基于模块化多电平换流器(modular multilevelconverter,MMC)的规模化电动汽车集中充放电系统。其拓扑在传统MMC的基础上,在子模块内部通过双向Buck/Boost电路连接连接电动汽车,通过控制实现了电网与子模块内电动汽车动力电池之间功率双向流动,并且可以避免目前由于大规模充放电引起的电能质量问题。通过Matlab/Simulink仿真,在模块全接入电动汽车的情况下,对系统结构的可行性和控制策略的有效性进行了验证,结果表明该系统兼具较高的灵活性和良好的电网友好性。In order to meet the requirements of large- scale EVs （electric vehicles）centralized charge and discharge in a spe- cific situation and solve the resulting serious problems such as three-phase unbalance, high grid-connected harmonic contents and so on, this paper proposes a large-scale centralized charge and discharge system of EVs based on modular multilevel con- verter （MMC）. The topology is based on the traditional MMC, and connects to EVs by bidirectional Buck/Boost circuit in each submodules, which makes bidirectional flow of power between grid and power battery of EVs in submodules, and the power quality problems caused by large-scale charge and discharge is avoided. The simulation based on Matlab/Simulink has verified feasibility of tbe system structure and the effectiveness of the control strategy in the case of the module is fully accessible to an EV, the results show that the system has high flexibility and good grid friendliness.

关 键 词：模块化多电平换流器 电动汽车 V2G 控制策略 稳态仿真 

分 类 号：U469.72[机械工程—车辆工程]