并联有源滤波器两步预测控制方法研究  

Research on two-sample-period-ahead predictive control for active power filter

作　　者：李哲[1] 吴正国[1] 夏立[1] 周卫平[1] 

机构地区：[1]海军工程大学电气工程学院,湖北武汉430033

出　　处：《电机与控制学报》2013年第2期22-27,共6页Electric Machines and Control

摘　　要：针对并联有源滤波器(APF)一步预测控制方法存在的补偿误差较大等问题,在详细分析数字控制方式下APF电流跟踪特性的基础上,提出了一种两步预测控制方法,该方法通过对参考电流在当前采样时刻准确预测出下两个采样时刻的数据来建立APF的参考电流轨迹,以此为基础推导了APF补偿电流对参考电流轨迹跟踪的最优控制律;针对补偿电流变化率较大时刻的跟踪问题,在两步预测控制的基础上结合基于重复控制的反馈校正来减小补偿的稳态误差。理论分析表明,与一步预测控制方法相比,两步预测控制方法能进一步有效减小APF补偿的误差。仿真和实验结果验证了所提出控制方法的有效性。One of the problems when applying predictive control to active power filter （APF） is that the tracing error can not be eliminated effectively. The control characteristic of APF based on digital control- ler was analyzed in detail, and then a control method which predicts the reference current behavior on next two instants were proposed. Optimal control law for tracing the reference current was obtained. A feedback method based on repetitive control was proposed to eliminate the steady error which happens when reference current changes severely. Theory analysis shows that two-step ahead predictive control method performs better results than one-step-ahead control method. Extensive simulations and experimen- tations confirm the validity of the proposed predictive control method.

关 键 词：并联有源滤波器 两步预测 预测控制 重复控制 数字控制 

分 类 号：TM464[电气工程—电器]