基于LCL-S拓扑的感应电能传输系统的建模与控制方法  

Modeling and Control Method of Inductive Power Transfer System Based on LCL-S Topology

作　　者：林天仁 李勇[1] 麦瑞坤[1] 

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》2018年第1期104-111,共8页Transactions of China Electrotechnical Society

基　　金：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(2682015CX021);牵引动力国家重点实验室自主研究课题(2016TPL_T11)资助项目

摘　　要：分析了基于LCL-S拓扑的感应电能传输(IPT)系统的动态特性,旨在利用数字PI控制器提高负载电压动态响应。首先,利用广义状态空间平均建模方法得到IPT系统的大信号模型及稳态工作点。在此基础上,建立描述在IPT系统的输入受到扰动状态下的小信号模型。经实验样机与小信号模型阶跃响应对比证明,小信号模型能够较准确地描述IPT系统动态响应。然后,根据小信号模型,借助Matlab中PIDtool工具箱设计合适的PI控制器参数,提高IPT系统的负载电压响应特性。最后,通过实验证明设计的闭环数字PI控制器使IPT系统负载电压响应时间在12 ms左右。This paper analyzes the dynamics of an LCL-S based inductive power transfer （IPT） system, and aims to improve its reference tracking performance by using a digital PI controller. Firstly, The large-signal model of the IPT system and the steady-state operating point are derived with the help of the generalized state-space averaging （GSSA） technique. Based on the previous work, the small-signal model is established to describe how the load voltage will react to a perturbation in its input. Comparing the step response of the small-signal model with the output of the experimental setup, the small-signal model is nearly identical to the system dynamics. In other words, the proposed small-signal model can describe the prototype well. Then, the Matalab’s PIDtool design toolbox is used to generate suitable PI controller parameters for a fast response time in the load voltage according to the small-signal model. Finally, experiments prove that the closed-loop digital PI controller is designed to ensure a fast response time of approximately 12 ms in the load voltage step change.

关 键 词：LCL-S 广义状态空间平均 小信号模型 数字PI控制器 

分 类 号：TM712[电气工程—电力系统及自动化]