摘要
车网能量信息双向互动(V2G)充电桩在创造社会经济效益的同时,会对区域电网电能质量造成影响。在介绍V2G充电桩内部电路及其控制基础上,指出其工作时造成交流侧谐波含量高、功率因数低的致因;从提升动态性能角度出发,将模糊控制与PI控制相结合,重新设计三相PWM整流电路双闭环控制策略并制定模糊规则表,实时获取控制器中比例参数和积分参数的调节量,实现动力电池充放电过程的在线优化。仿真结果表明,优化后的电池充电动态调整时间缩短至0.05s,放电动态调整时间缩短至0.02s;两种模式下,充电桩均能实现单位功率因数运行,且交流侧电流谐波总畸变率(THD)分别降至2.38%和3.13%,电能质量指标符合入网运行要求。
A charging pile with energy and information interacted from vehicle to grid(V2G)and vice versa can not only create social and economic benefits,but also affect the power quality of the regional power grid.Based on the introduction of the internal circuit and control method of V2G charging pile,the causes of higher harmonic waves and lower power factor generated at its AC side are pointed out.In order to improve the dynamic performances of the charging pile controller,fuzzy logic is proposed to combine with the original PI controller.The three-phase PWM rectifier with a double-closed loop control strategy is redesigned and the fuzzy rule is formulated.So the regulating quantities toward proportional parameter and integral parameter in the fuzzy-PI controller can be obtained immediately,and the online optimization is implemented during the electric vehicle(EV)traction batteries charging and discharging process.After the optimization,the time for dynamic regulation in charging mode is reduced to O.05s,and that in discharging mode is reduced to O.O2s.The charging pile can operate with unit power factor in both modes,and the total harmonic distortion(THD)rates of current on the AC side are respectively declined to 2.38%and 3.13%,which meet the requirements of the grid-connected operation.
作者
崔进
张良力
刘江
王斌
CUI Jin;ZHANG Liang-li;LIU Jiang;WANG Bin(Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《计算机仿真》
北大核心
2023年第3期116-121,245,共7页
Computer Simulation
基金
国家自然科学基金(51877161)。
