【摘要】 为提高电能质量,需对电网谐波进行补偿和抑制,其效果取决于谐波检测的精度和动态响应特性。传统的RLS谐波电流检测方法存在突变响应过慢的缺点。根据信号处理中的自适应噪声抵消技术(ANCT),提出了一种改进的RLS自适应谐波电流检测方法:即通过追踪滤波器权值W(n)的变化,并适当调节RLS算法中更新方程P(n)的参数,来达到快速收敛的目的。最后,在计算机仿真平台下,通过Matlab/Simulink对改进的RLS算法的性能进行仿真验证。实验结果表明,改进的RLS自适应谐波电流检测方法具有良好的特性,满足了谐波检测的精度和实时性。更多还原

【Abstract】 To improve the quality of electric energy,the effects of restraining and compensating for the harmonics of power grid are determined by precision of detection and its dynamic response characteristics. The conventional detecting methods RLS for harmonic currents have various limitations,such as a slower dynamic response. In this paper,according to the adaptive noise canceling technology in the signal processing,an improved adaptive algorithm of detecting harmonic currents was presented. In order to achieve the purpose of rapid convergency speed,the new method tracked the changes of filter weight vector and adjusted the parameters of P( n) of the algorithm. In the end, the improved algorithm was simulated with the Matlab / Simulink simulation platform. The experimental results show that improved adaptive algorithm of detecting harmonic currents has good characteristics,which meets the requirements of precision and real time of harmonics test.更多还原