基于自适应变步长最小均方的谐波检测算法的研究  

Research of Harmonic Detecting Algorithm Based on Adaptive Variable Step Size Least Mean Square

作　　者：黄华[1] 

机构地区：[1]东南大学电气工程学院,江苏南京210096

出　　处：《电工电气》2010年第1期47-50,共4页Electrotechnics Electric

摘　　要：从数字信号处理中的自适应噪声对消原理出发,介绍了一种改进的变步长最小均方(LMS)算法,该算法根据基波电流和谐波电流的不相关性,利用误差信号和参考输入的互相关估计来控制迭代步长,使得步长的更新不受谐波电流的影响。该算法原理简单,运算量小,易于实现,仿真结果表明了该谐波电流检测算法的有效性。From the principle of adaptive noise cancellation in digital signal processing, an improved variable step size least mean square （LMS） algorithm was introduced. Based on the irrelevance of fundamental currents and harmonic currents, the algorithm adopted cross-correlation estimation of error signal and reference input to control iteration step size, so that harmonic currents had no effect on step size updating. This algorithm has simple principle, small calculating amount, which is easy to realize. Simulation results indicate the validity of this harmonic currents detection algorithm.

关 键 词：谐波检测 变步长最小均方 噪声对消 互相关估计 

分 类 号：TM935[电气工程—电力电子与电力传动]