有源电力滤波器自校正预测控制方法  

Novel self-tuning predictive control method of shunt active power filter

作　　者：胡志坤[1] 胡锰洋[1] 桂卫华[2] 阳春华[2] 何志敏[1] 

机构地区：[1]中南大学物理科学与技术学院,湖南长沙410083 [2]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《电机与控制学报》2010年第3期18-23,30,共7页Electric Machines and Control

基　　金：深圳市科技计划基础研究项目(JC200903180555A);长沙市科技计划(K0803159-12)

摘　　要：提出了基于预测控制和空间矢量调制的有源电力滤波器输出补偿电流控制方法。利用外推拉格朗日插值法对有源电力滤波器输出电压进行线性预测,并对其引入校正因子,得出了基于自校正的无差拍指令电压计算模型,以实现对输出补偿电流的闭环无差拍控制;随后在对指令电压进行空间矢量调制过程中简化传统的矢量定位方法,并优化空间矢量的作用时序以降低功率器件的开关损耗。在电网电压不对称且存在畸变条件下的理论分析和仿真结果证明该方法能有效的跟踪指令电流的变化。以此为基础设计一套三相并联型有源电力滤波器,并在10kV电力系统试运行,实验结果验证了该控制方法的有效性。In this paper, a novel compensation current control method of three-phase three-wire shunt active power filter is presented based on current prediction and space vector modulation. The output voltage of shunt active power filter was predicted by means of Lagrange interpolation, and then modified using a correction factor to achieve a self-tuning prediction model of voltage reference. The space vector location operation was simplified during the space vector modulation, and the switching sequence was also optimized to decrease the switching loss of power semiconductors. Both theoretical analysis and simulation under unsymmetrical and distorted voltage supply conditions verify that the proposed method can make a good tracking performance between current reference and compensation current. A three-phase shunt active power filter is designed and expefimentaly functions on a 10 kV power system to prove the validity of the proposed control method.

关 键 词：并联型有源电力滤波器 自校正预测控制 无差拍控制 空间矢量调制 

分 类 号：TM76[电气工程—电力系统及自动化]