基于ELMS算法的电网谐波电流检测

Detection of Harmonic Currents in Power System Based on the ELMS Algorithm

在LMS自适应滤波方法的基础上,根据电网谐波快速检测的要求,导出实现最优权值快速计算的ELMS(Extrapolated LMS)算法公式,该算法在理论上能更有效地提高谐波检测的精度和检测实时性。理论研究和仿真表明,根据该ELMS算法设计的自适应滤波系统可实现对电网谐波的快速检测。

According to the need for fast detection of harmonic currents based on LMS filter,this paper proposes an ELMS(Extrapolated LMS) algorithm formula of optimal weight for LMS,which improves the precision and dynamics performance of detecting harmonics.Theoretical analysis and simulations shows that this ELMS algorithm of harmonic detection can be adopted to the fast harmonic currents detection in power system.