基于自适应滤波算法的谐波仿真分析

为改善自适应滤波算法的滤波效果,减小稳态误差,提高跟踪响应速度,并验证改进的变步长LMS滤波算法的有效性和优越性,利用电磁暂态仿真软件PSCAD/EMTDC,构建电网谐波仿真计算模型,并与传统的基于瞬时无功功率理论的p-q算法以及定步长LMS算法进行仿真比较,根据不同系统条件下的滤波仿真波形,进行快速傅里叶分析,验证了此改进变步长LMS算法在计算量增加不多的前提下,可以同时获得较好的跟踪速度和较小的稳态误差,证实了该算法的有效性。

Harmonic Simulation Analyzing Based on Adaptive Filtering Algorithm

In order to improve the effect of adaptive filtering algorithm,reduce steady-state error and increase tracking speed,this paper uses electro-magnetic transient simulation software PSCAD/EMTDC(Power System Computer Aided Design/Electro-Magnetic Transient in DC System) to verify the superiority of modified variable step size least mean square(LMS) algorithm.Through building a simulation model,comparing with the traditional p-q algorithm based on transient reactive power and LMS algorithm,the simulation wavefo...