电动汽车接入的电力电子变压器低压直流侧拓扑
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摘要
为方便电动汽车接入电网实现电动汽车充放电功能,提出一种电动汽车接入的具有交直流切换技术的电力电子变压器低压直流侧拓扑。通过对电动汽车充电负荷曲线与基础交流负荷曲线两者的关系及峰值时刻的功率进行分析,提出一种容量配置方案,结合实例说明了所提拓扑具有节省变压器容量、提高容量利用率的特色。在PSCAD仿真环境下搭建了仿真模型,通过仿真验证了所提拓扑及采用控制策略的可行性。
To facilitate the connection of electric vehicles(EVs)to power grid and realize the charging and discharging function of EVs,a low-voltage DC-side topology of power electronic transformer(PET)with access of EVswas proposed,which was endowed with the AC/DC switching technology. By analyzing the relation between the charging load curve andthe basic AC load curve of EVs as well as the power at the peak time,a capacity configuration scheme was proposed. With the combination of an example,it wasshownthat the proposed topology hadthe characteristics of saving the transformer's capacity and improving the capacity utilization ratio. A simulation modelwas built in PSCAD simulation environment,and the feasibility of the proposed topology and control strategy was verified through simulations.
To facilitate the connection of electric vehicles(EVs)to power grid and realize the charging and discharging function of EVs,a low-voltage DC-side topology of power electronic transformer(PET)with access of EVswas proposed,which was endowed with the AC/DC switching technology. By analyzing the relation between the charging load curve andthe basic AC load curve of EVs as well as the power at the peak time,a capacity configuration scheme was proposed. With the combination of an example,it wasshownthat the proposed topology hadthe characteristics of saving the transformer's capacity and improving the capacity utilization ratio. A simulation modelwas built in PSCAD simulation environment,and the feasibility of the proposed topology and control strategy was verified through simulations.
引文
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[3]张黎,吴昊,曹磊,等(Zhang Li,Wu Hao,Cao Lei,et al).基于Z型变压器的交直流混合配电网仿真分析(Simulation analysis of zigzag transformer-based AC-DC combined distribution network)[J].电力系统自动化(Automation of Electric Power Systems),2014,38(2):79-84.
[4]周家萍,邵丽,陈华(Zhou Jiaping,Shao Li,Chen Hua).应用于智能配电网的带储能系统的电力电子变压器研究(Research on power electronic transformer with energy storage system applied in intelligent distribution network)[J].电气技术(Electrical Engineering),2014,33(5):74-78.
[5]刘海波,毛承雄,陆继明,等(Liu Haibo,Mao Chengxiong,Lu Jiming,et al).电子电力变压器储能系统及其最优控制(Energy storage system of electronic power transformer and its optimal control)[J].电工技术学报(Transactions of China Electrotechnical Society),2010,25(3):54-60.
[6] Vasiladiotis M,RuferA. A modular multiport power electronic transformer with integrated split battery energy storage for versatile ultrafast EV charging stations[J]. IEEE Trans on Industrial Electronics,2015,62(5):3213-3222.
[7] Zhao Bai,Song Qiang,Liu Wenhua. A practical solution of high-frequency-link bidirectional solid-state transformer based on advanced components in hybrid microgrid[J].IEEE Trans on Industrial Electronics,2015,62(7):4587-4597.
[8] Jalakas T,Roasto I,Gallardo-Lozano J,et al. Electric vehicle multiport fast charger based on the concept of active power electronic transformer[C]//16th European Conference on Power Electronics and Applications. Lappeenranta,Finland,2014.
[9]李宁宁,梁爽,纪延超,等(Li Ningning,Liang Shuang,Ji Yanchao,et al).基于LCL滤波器的蓄电池双向DC/DC变换器的研究(Research on battery DC/DC bidirectional converter using LCL filter)[J].电机与控制学报(Electric Machines and Control),2015,19(7):8-13.
[10]刘飞,查晓明,段善旭(Liu Fei,Zha Xiaoming,Duan Shanxu).三相并网逆变器LCL滤波器的参数设计与研究(Design and research on parameter of LCL filter in three-phase grid-connected inverter)[J].电工技术学报(Transactions of China Electrotechnical Society),2010,25(3):110-116.
[11]王姝凝,杨少兵(Wang Shuning,Yang Shaobing).居民小区电动汽车充电负荷有序控制策略(A coordinated charging control strategy for electric vehicles charging load in residential area)[J].电力系统自动化(Automation of Electric Power Systems),2016,40(4):71-77.
[12]陈新,姬秋华,刘飞(Chen Xin,Ji Qiuhua,Liu Fei).基于微网主从结构的平滑切换控制策略(Smooth transferring control method of microgrids based on master-slave configuration)[J].电工技术学报(Transactions of China Electrotechnical Society),2014,29(2):163-170.
[13]闫卫国,蒋菱,陈晓祺,等(Yan Weiguo,Jiang Ling,Chen Xiaoqi,et al).孤立运行的低压微电网改进下垂控制策略(Improved droop control strategy for island low-voltage microgrid)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2018,30(6):45-52.