基于改进模糊PID策略的矩阵变换器闭环控制  

Closed-loop Control on Matrix Converter Based on Improved Fuzzy PID Strategy

作　　者：刘大卫[1] 杨俊华[1] 杨梦丽[2] 吴捷[3] 

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]信阳供电公司,河南信阳464000 [3]华南理工大学电力学院,广东广州510641

出　　处：《广东电力》2012年第7期31-37,共7页Guangdong Electric Power

基　　金：国家自然科学基金重点项目(60534040);广东省教育厅专项重点实验室项目(IDSYS200701);广东省科技计划项目(2009B010900052)

摘　　要：为改善矩阵式变换器(matrix converter,MC)在负载扰动或不平衡状况下输出的稳定性,提出一种带修正函数的自调整模糊比例积分微分(proportion integration differentiation,PID)闭环控制器。将MC的输出线电压进行Park变换得到d-q坐标下的直流分量,利用改进的模糊PID控制器跟踪控制输出电压的d、q分量;在控制器中引入修正函数降低误差的影响,同时引入线性插值算法来实现由离散控制变量到连续控制变量的转换;最后使用协调因子改变模糊控制和PID控制输出权重,使控制效果最优。仿真结果表明,该策略改善了系统的控制品质,可使MC获得良好的动、静态性能。In order to improve output stability of matrix converter （MC） in case of load disturbance or imbalance, the paper proposes closed-loop controller based on improved fuzzy proportion integration differentiation （P1D）. The output line volt- age of MC is converted into two direct current components under d-q axis by Park transformation and the two components are controlled to track components d and q of output voltage by the improved fuzzy PID controller. The modification func- tion is introduced in controller to reduce the errors and linear interpolating method is introduced for transformation from dis- crete control variable to continuous control variable. Ultimately, the coordinating factor is adopted to change the output weights between the fuzzy controller and PID controller to have the control optimized. The simulation result shows that the strategy improves control quality of the system and enables MC to acquire dynamic and static performance.

关 键 词：矩阵变换器 空间矢量调制 模糊控制 PID控制器 修正函数 线性插值 协调因子 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TM46[自动化与计算机技术—控制科学与工程]