基于混合预测策略的改进型并联有源电力滤波器无差拍控制  

Improved dead-beat control algorithm of shunt active power filter based on mixed prediction strategy

作　　者：韩伟[1,2] 王大志[1] 李云路[1] 

机构地区：[1]东北大学电力系统与电力传动研究所,沈阳110004 [2]内蒙古民族大学物理与电子信息学院,内蒙古通辽028043

出　　处：《控制与决策》2014年第6期991-996,共6页Control and Decision

基　　金：国家211计划项目(28110514);内蒙古自然科学基金项目(2013MS0922);内蒙古民族大学科学研究基金项目(NMD1307)

摘　　要：针对传统的无差拍电流跟踪控制受时延影响实际上是差一拍控制,提出一种改进的无差拍控制.该方法提前两个采样周期预测出有源电力滤波器(APF)指令电流,提前一个采样周期预测出逆变器输出电流,从而实现真正意义上的无差拍控制.同时,提出一种综合考虑负载谐波电流稳态和动态过程的混合预测策略,使上述预测过程更加准确、快速.仿真实验结果表明,基于该方法的APF在负载稳态和变化时均具有良好的补偿效果.An improved dead-beat control algorithm is proposed for the problem that the conventional dead-beat control is actually an one-step-delay control affected by the time delay. The algorithm predicts the active power filter（APF） current reference two sample instants in advance with respect to the measurement instant and the inverter output current one sample instant in advance, and then the ＂real＂ dead-beat control is achieved. A mixed prediction strategy is also proposed considering both the steady and dynamic conditions of the load harmonic current, which makes the above prediction process more accurate and more rapid. The simulation experiment shows that the mixed perdition dead-beat control based APF can compensate the harmonic very effective both in the steady and dynamic conditions.

关 键 词：混合预测策略 改进的无差拍控制 自适应前向线性预测 

分 类 号：TM46[电气工程—电器]