考虑阻感性负载IPT系统的动态补偿技术  

Dynamic Compensation Strategy of Inductive Power Transfer System with Inductive-Resistive Load

作　　者：何正友[1] 李勇[1] 麦瑞坤[1] 李砚玲[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《西南交通大学学报》2014年第4期569-575,589,共8页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金重点资助项目(U1234203);铁路总公司科技研究开发计划课题(2014J013-B);中央高校基本科研业务费专项资金资助项目(2682014CX023)

摘　　要：针对整流性负载呈现出阻感特性引起感应电能传输(IPT)系统失谐,为了保持谐振频率,提出一种基于实测负载阻抗的动态补偿技术.该技术利用短时傅立叶变换得到负载的电流电压相量并计算出负载的感抗,通过动态调整电容阵列静态开关的方法改变其容值,达到补偿负载感抗目的.在阻感负载情况下,分别对浮频调谐控制方法以及动态电容阵列补偿方法进行实验比较,结果表明:相对浮频调谐控制方法,当负载为100和50Ω时,本动态调谐方法传输的有功功率提高了12.1%和7.3%,且能保持初级谐振电路频率稳定,开关器件工作在软开关状态.The equivalent inductive impedance of the rectifier load will lead to a detuned IPT （Inductive Power Transfer ） system. In order to maintain resonance frequency, a dynamic compensation scheme was proposed. This scheme utilizes short-time Fourier transformation to obtain the current and voltage phasors,and then calculates the impedance. It can dynamically adjust the equivalent capacitance value of the capacitor array by turning off or on the static switches,and realize load inductance compensation. The experiments were performed to compare the performance between the frequency tracking method and the proposed algorithm under rectified load. The result shows that with 100 and 50Ωload resistances,the proposed algorithm can increase the real power by 12. 1% and 7. 3%. Moreover,the resonance frequency of the primary circuit can be maintained and the switching devices can work under a ZCS （Zero Current Switching）condition.

关 键 词：阻感负载 感应电能传输(IPT) 补偿电容阵列 谐振电路 频率稳定 

分 类 号：TM712[电气工程—电力系统及自动化]