基于CZT的光伏发电系统间谐波检测方法研究

摘要

In photovoltaic power generation system, power electronic equipment is widely applied. The nonlinear, impulsive and fluctuating loads greatly increase in large power grid, and the pollution of power quality becomes more and more serious. The power characteristics of the photovoltaic power generation system are researched in this paper. The improved algorithm of the Rife-Vincent (Ⅲ) convolution window is proposed based on research of the spectrum leakage and fence effect caused by the frequency domain characteristics of the common window function. By simulation, the detection accuracy for the weak inter-harmonic amplitude increased with improved algorithm.%在光伏发电系统中,各种电力电子设备的广泛应用,使得含光伏发电系统的大电网中非线性、冲击性和波动性的负荷大大增加,从而使得电能质量的污染也变得越来越严重.该文针对光伏发电系统电能特征进行研究,在研究常用窗函数频域特性及加窗插值算法对频谱泄露和栅栏效应的改进方法的基础上,提出基于Rife-Vincent(Ⅲ)窗函数的改进算法与实现步骤.通过仿真,改进算法使得微弱间谐波幅值检测精度得到提高.