用于电动汽车无线充电的电压源型ICPT系统最优电容补偿参数选择方法  

Selection method of optimal capacitance compensation parameter for voltage-source type ICPT system used in wireless charging of electric vehicles

作　　者：刘坤[1] 葛佳蔚 杨富尧 陈新 康锦萍[1] 赵海森[1] LIU Kun;GE Jiawei;YANG Fuyao;CHEN Xin;KANG Jinping;ZHAO Haisen(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,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]全球能源互联网研究院有限公司先进输电技术国家重点实验室,北京102211

出　　处：《电力自动化设备》2021年第6期53-58,共6页Electric Power Automation Equipment

基　　金：国家电网公司科技项目(7000-201958480A-0-00)。

摘　　要：电压源型感应耦合电能传输(ICPT)系统通常被用于电动汽车无线充电,该系统在采用串联电容补偿时,耦合系数较大会引起输出功率降低,工程实际中通常采用提高电压达到预期输出功率,但这对电源提出了更高要求且易引起过电流。为了解决这一问题,研究了串联电容补偿ICPT系统的补偿特性,得出了补偿电容值偏离谐振点后系统的工作特性,并利用非线性规划方法对电容参数进行优化,实现了在耦合系数较大确保ICPT系统输出功率的同时,使得系统效率下降幅度最小。利用一台3 kW无线充电样机验证了优化结果的有效性,结果表明当系统输出功率从1.2 kW提高至3 kW时,系统效率仅下降1.3%,且在偏移情况下利用电容切换仍能确保输出功率的同时系统效率不低于94%。Voltage-source type ICPT(Inductively Coupled Power Transfer)system is widely using in wireless charging of electric vehicles.The series compensation in ICPT system will cause higher coupling coefficient,which leads a lower output power.In engineering practice,increasing the voltage is usually used to reach the required output power,but this puts forward to higher requirements on the power supply and causes overcurrent easily.In order to solve this problem,the compensation characteristics of ICPT system with series capacitance compensation are studied,and the operating characteristics of the system after the compensation capacitance deviated from the resonance point are obtained.The capacitance parameters are optimized using nonlinear programming method to minimize the efficiency decline of the system while ensuring the output power of the ICPT system and big coupling coefficient.A 3kW wireless charging prototype is used to verify the effectiveness of the optimization results.The results show that when the output power of the system is increased from 1.2kW to 3kW,the system efficiency only decreased by 1.3%.In the offset case,it can also ensure that the system efficiency is not less than 94%while the output power is ensured by using capacitor switching.

关 键 词：电动汽车 ICPT系统 串联补偿 电容补偿特性 优化 非线性规划 

分 类 号：U469.72[机械工程—车辆工程]