基于极点配置状态反馈的PWM逆变器控制策略

作者：杨秀云，南余荣 日期：2009-06-17/span> 浏览：3121 查看PDF文档

基于极点配置状态反馈的PWM逆变器控制策略

杨秀云，南余荣
（浙江工业大学 信息工程学院，浙江 杭州 310014）

摘要：针对逆变电源采用数字化控制时由于时间延迟等因素导致系统稳定度降低、动态调节性能不佳的问题，基于状态空间法对脉宽调制（PWM）逆变器进行了建模，采用极点配置状态反馈控制方法，来改善系统动态性能;同时，引入状态观测器设计，提前一拍给出控制量，从而削弱了时间延迟的影响。最后，通过Matlab仿真验证了该方法的可靠性。实验结果表明，该方法大大改善了系统动态性能。
关键词：极点配置；状态反馈；观测器；全桥逆变器；脉宽调制
中图分类号：TM464文献标识码：A文章编号：1001-4551(2009)05-0034-04

Control strategy of PWM inverter based on state-observer
YANG Xiu-yun, NAN Yu-rong
（College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014, China）
Abstract: Aiming at the impact of time delay in inverters on low stabilily and poor performance, the pulse width modulation(PWM) converter based on statespace was modeled, and the state feedback method based on poles placement was adopted to improve dynamic performance of the system. Thus, the detailed design method and the necessity of state estimator was introduced. The state estimator was used to make the inverter achieve fast dynamic response, the influence of time delay was decreased. The experiment results indicate the reliability of this method.
Key words: poles placement; state feedback; estimator; full bridge inverter; pulse width modulation(PWM)
参考文献(References):
［1］ECKARDT D. Observerbased Control of a Three Phase Inverter ［C］//Proceedings of the 5th European Conference on Power Electronics and Applications,1993,9(3):286-291.
［2］TOMOKI Y, ATSUO K. Disturbance observer based fully digital controlled PWM inverter for CVCF operation ［J］.IEEE Transactions on Power Electronics,1994,5(9):473-480.
［3］杨国权，段善旭，樊明武.基于状态观测器的中频逆变器双环控制方案［J］.电力电子技术，2007，41（3）:64-66.
［4］黄俊，王兆安.电力电子变流技术［M］.北京：机械工业出版社，1994.
［5］郑大钟.线性系统理论［M］.北京：清华大学出版社，1990.
［6］薛定宇.反馈控制系统设计与分析［M］.北京：清华大学出版社，2000.