DC/AC变换器的混杂系统建模及预测控制  

Hybrid Dynamic Modeling and Model Predictive Control for DC/AC Converter

作　　者：郑雪生[1] 李春文[1] 戎袁杰[1] 

机构地区：[1]清华大学自动化系,北京100084

出　　处：《电工技术学报》2009年第7期87-92,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(60674039)资助项目

摘　　要：DC/AC变换器是典型的混杂系统,分析了变换器的动态特点和系统所受的约束及控制目标。在建模中为了考虑开关动态将PWM周期进行细分,通过引入逻辑变量来判断各个子区间的开关状态从而确定系统的动态演化方程。用混杂系统语言编辑工具HYSDEL对系统进行描述得到混合逻辑动态模型,基于模型设计预测控制器,通过在线求解对应的混合整数规划问题得到数值解。仿真结果验证了模型建立的正确性和控制器设计的有效性。DC/AC converter is inherently hybrid in structure. The dynamic characteristic of the converter is analyzed and from the view of control the optimization goal is given. In order to include the switches＇ dynamic in the model the PWM period is divided into several subperiods. The switches＇ states in each subperiod are judged by introduced auxiliary logic variables, which decided how the system evolved. The tool of HYSEDL is used to describe the converter and the mixed logic dynamic（MLD） model is obtained. Based on the model the predictive controller is designed~ The numerical value solution is achieved by solving the corresponding mixed integer linear programming problem. The simulation results verify the validity of the model and the effectiveness of the proposed controller.

关 键 词：DC/AC变换器 混合逻辑动态 模型预测控制 

分 类 号：TM464[电气工程—电器] TP13[自动化与计算机技术—控制理论与控制工程]