基于改进NLMS算法的谐波电流检测方法

Harmonic Current Detecting Method Based on Improved NLMS

针对传统NLMS算法在谐波电流检测中存在的动态响应速度和稳态精度的平衡问题,本文提出了一种基于动量项最小均方(MLMS)理论的NLMS算法的谐波电流检测方法。该算法在利用固定的小步长参数来保证高的稳态精度的同时,通过调整动量项来加速谐波检测响应速度,很好的解决了上述的平衡问题。仿真结果验证了该方法的有效性。

This paper presents a harmonic current detecting method based on momentum least mean square（MLMS） theory＇s NLMS （Normalized Least Mean Squares） algorithm in allusion to traditional NLMS algorithm in dynamic response speed and steady state accuracy balance problems in the harmonic current detection. The algorithm uses the fixed step length parameters to ensure high steady state accuracy, at the same time, accelerating the response speed of the harmonic detection by adjusting the momentum item. The balance problem is solved and simulation results verify the effectiveness.