|
|
|
| A Novel Fast Convergence LMS Harmonic Detection Algorithm |
| GUO Rui,LI Bao-hua,MA Ao-yun |
| Department of Electrical and Control Engineering, Liaoning Technical University, Huludao, Liaoning 125105, China |
|
|
|
|
Abstract Aiming at the problem between convergence speed and steady-state accuracy of traditional fixed step size LMS algorithm for harmonic detection, a improved variable step size LMS harmonic detection algorithms with higher convergence speed is presented.This algorithm used autocorrelation estimate of the error signal e(n), e(n－1) in the same phase in two adjacent time to adjust step size, and used normalization method , the k(n) and k(n－1) are as new feedback, which k(n) and k(n－1) are the proportion of the error signal in the total current signal, then using coherence average estimate of the feedback amount to control the step size updating; by introducing the disturbance of the absolute estimation error to update the tapping vector of the self-adaptive filter in weight iteration formula. Finally, MATLAB/Simulink simulation and experimental results show that the method compared to conventional fixed step size LMS harmonic detection algorithm has good performance on the convergence speed and steady-state accuracy, especially the method has good tracking performance in load mutation.
|
|
Received: 19 June 2014
Published: 10 December 2015
|
|
|
|
|
|
［1］杨洪耕,惠锦,侯鹏.电力系统谐波和间谐波检测方法综述［J］.电力系统及其自动化学报,2010,22(2):65-69.
［2］关彬,崔玉龙,王圆月.基于瞬时无功功率理论的谐波检测方法研究［J］.电测与仪表,2007,44(10):1-4.
［3］于志豪,刘志珍,徐文尚.基于电路模型和神经网络的谐波电流检测方法［J］.电工技术学报,2004,19(9):86-89.
［4］吕振,梁国林,卢于,等. 改进型的id-iq谐波检测方法研究与仿真［J］.电力电子技术,2012,46(5):81-83.
［5］Wang Q, Wu N, Wang Z A. A neuron adaptive detecting approach of harmonic current for APF and its realization of analog circuit［J］.IEEE Transactions on Instrument and Measurement,2001,50（1）:77-84.
［6］刘国海,张懿.一种新的变步长MLMS 谐波电流检测法 ［J］. 电气传动,2009,39（2）:44-47．
［7］吕振林,田岚.基于一种新型自适应滤波的谐波检测算法［J］.电力系统及其自动化学报,2007,19（5）:75-78.
［8］吕振肃,黄石.一种改进的变步长ELMS算法［J］.电子与信息学报,2005,27（10）:1524-1526.
［9］姜齐荣,赵东元,陈建业.有源电力滤波器［M］.北京:科学出版社,2005.
［10］龚耀寰.自适应滤波［M］.北京:电子工业出版社,1981．
［11］Simon Haykin. Adaptive Filter Theory［M］.4th ed. Beijing: Publishing House of Electronics Industry,2002.
［12］谷源涛.LMS算法收敛性能研究及应用［D］.北京:清华大学,2003.
［13］李宁.LMS自适应滤波算法的收敛性能研究及应用［D］.长春:哈尔滨工程大学,2009.
［14］杨建宁,陈婕,关佳军,等．一种改进变步长的自适应谐波检测算法［J］.电力系统保护与控制,2011,39(6) : 40-52．
［15］李文江,齐文彬. 一种新型变步长自适应谐波检测算法［J］.电力电子技术,2012,46(5):87-89. |
|
|
|
2016, Vol. 37 
