双LCL型感应电能传输系统H_∞鲁棒控制  

H_∞ Robust Control of Dual-LCL Inductive Power Transmission System

作　　者：孙琪琪 夏晨阳[1] 李欣宇 贾仁海 刘旭[1] SUN Qiqi;XIA Chenyang;LI Xinyu;JIA Renhai;LIU Xu(Jiangsu Province Laboratory of Mining Electric and Automation,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]江苏省煤矿电气与自动化工程实验室(中国矿业大学),江苏徐州221116

出　　处：《广东电力》2018年第11期32-38,共7页Guangdong Electric Power

基　　金：国家自然科学基金项目(51777210);江苏省自然科学基金项目(BK20171190)

摘　　要：因负载变化、磁路机构的偏移以及元器件的老化等因素导致的双LCL型感应电能传输(inductively power transfer,IPT)系统出现输出电压变化及系统频率漂移等不确定性问题会加剧系统性能的恶化,为此,针对双LCL型IPT系统在负载摄动和干扰下的稳压输出,设计闭环系统的鲁棒控制器。首先采用广义状态空间平均法建立系统频域模型,将实际被控对象的模型转化为广义系统,借助上线性分式变换分离系统的标称部分和不确定部分,得到广义被控对象模型。然后,基于该模型设计H_∞鲁棒控制器,并利用结构奇异值的频率响应校验闭环系统的鲁棒稳定性及鲁棒性能。仿真和实验结果表明该控制器可以较好地保证双LCL型IPT系统的标称性能和鲁棒性能,验证了该模型和控制方法的有效性和可行性。Several uncertainty problems such as output voltage change and system frequency variation of the dual LCL inductive power transmission （IPT） system caused by factors of load change, variations of magnetic circuit mechanisms, aging of components, and so on may intensify aging of system performance.Therefore, aiming at constant voltage output of the dual LCL IPT system under load perturbation and interference, this paper designs a robustness controller of the closed-loop system.It firstly adopts the generalized state space averaging （GSSA） method to build the system frequency domain model to transform the model of actual controlled object into a generalized system.Secondly, it separates the nominal part and the uncertain part of the system by using the upper linear fractional transformation to get the generalized controlled object model.On the basis of this model, it designs the H ∞ controller and makes use of frequency response of structural singular value（SSV） to test robust stability and robust performance of the closed-loop system.Simulation and experimental results indicate this controller can better ensure nominal performance and robust performance of the dual LCL IPT system and verify effectiveness and feasibility of the model and the control method.

关 键 词：广义状态空间平均法 H∞鲁棒控制 上线性分式变换 结构奇异值 鲁棒稳定性和鲁棒性能 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TM724[自动化与计算机技术—控制科学与工程]