感应电能传输系统分段供电的双自由度鲁棒控制  

Double-Degree of Freedom Robust Control for Segmented Inductive Power Transfer System

作　　者：李砚玲[1] 杨鸣凯[1] 杜浩 Li Yanling;Yang Mingkai;Du Hao(School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China)

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《电工技术学报》2017年第18期62-72,共11页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划轨道交通专项课题(2017YFB1201002);国家自然科学基金(51507147);国家杰出青年科学基金(51525702)资助项目

摘　　要：感应电能传输(IPT)系统在采用分段供电模式时,由于跨区段处励磁磁场强度分布不均,总会引起负载端拾取功率波动,影响系统稳定性及性能。针对IPT系统跨区段供电的输出稳定问题,以LCL谐振电路并联的IPT系统为研究对象,设计一种基于双自由度鲁棒控制的恒压输出策略。借助广义状态空间平均建模方法,结合跨区段处的互感扰动规律,建立参数不确定性模型;基于广义混合灵敏度指标,通过改变输出加权函数增益,得到快速抑制互感扰动影响的H∞鲁棒控制器;在此基础上,推导并设计出用于修正参考输入的前置滤波器;实验结果表明,双自由度鲁棒控制不仅对跨区段互感扰动影响具有较好抑制作用,且能明显改善对参考输入的跟踪响应性能。The load-side pickup power of inductive power transfer(IPT)system is often influenced by the uneven distribution of magnetic field intensity between the segmented primary coils,particularly in the setting of segmented IPT systems,which will affect system stability and performance.This paper focuses on the output stabilization problem of a simplified two-coil segmented IPT system which is powered by parallel-connected LCL resonant circuits.A double-degree of freedom(DOF)robust control technique is therefore introduced for constant voltage output.Firstly,according to the perturbation law of mutual inductance around segmentation transitions,the parameter uncertainty model is established via the generalized state-space averaging(GSSA)method.After that,an H∞controller is obtained by adjusting the gain of output weighting function based on the generalized mixed sensitivity,thus the fast performance to restrain the effect of mutual inductance perturbation is achieved.For further correction of the reference input,the derivation and design of a pre-filter is introduced afterwards.The experimental result shows double-DOF control can attenuate the effect of mutual inductance perturbation during segmentation transition and improve the tracking response performance of reference input significantly.

关 键 词：感应电能传输 互感不确定性 广义状态空间平均 鲁棒控制 双自由度 

分 类 号：TM724[电气工程—电力系统及自动化]