基于准谐振控制器的变步长自适应滤波算法  

A New Variable Step-size Adaptive Filter Algorithm Based on Quasi-PR Controller

作　　者：吴振兴[1] 周亮[1] 蔡信健[1] 孙乐[1] 

机构地区：[1]海军工程大学,舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《电力电子技术》2013年第12期42-44,共3页Power Electronics

基　　金：国家自然科学基金(51277178)~~

摘　　要：传统变步长自适应滤波算法应用于有源电力滤波器(APF)或静止同步补偿器(STATCOM)时虽具有较快的动态响应性能,但由于被检信号中的谐波分量对步长及权数的影响,算法的稳态精度不高。提出一种改进的变步长自适应滤波算法,引入准谐振控制器,基本消除了被检信号中谐波分量的影响,步长因子可收敛于一个较小的稳态值,算法具有较快的动态响应速度以及较好的稳态检测精度。最后通过仿真和实验证明了改进算法的合理性和有效性。Traditional variable step-size adaptive filter algorithm applied in active power filter （APF） or static syn- chronous compensator （STATCOM） has faster dynamic response performance, but its steady state accuracy usually can＇t meet the requirements.A new variable step-size adaptive algorithm adopts the quasi-proportional resonant con- troller in the calculation formula of step-size factor is proposed, it could eliminate the influence of harmonic current on the step-size factor, and makes the step-size factor converged to a little and small changed steady state value.This algorithm shows better steady state detection accuracy and fast dynamic detection speed.The reasonability and validity are testified by the simulation and experimental results.

关 键 词：准谐振控制器 谐波检测 自适应算法 变步长 

分 类 号：TM571[电气工程—电器]