基于现代谱估计的光伏系统谐波仿真分析

Analysis on Harmonic Simulation of Photovoltaic System based on Modern Spectrum Estimation

光伏发电系统在并网时产生的出力波动会影响电网的电能质量。对太阳能示范电站光伏发电系统进行检测,观察光伏发电系统并网输出功率等因素的波动,分析其对低压配网造成的电能质量谐波问题。利用现代谱估计算法与传统傅里叶分析方法对信号进行仿真对比,结果表明现代谱估计算法能够更加精确地得到各次谐波分量。

Because of the nonlinear characteristics of photovohaic power generation system itself as well as the random output of the grid, the output fluctuations will affect the power quality of power grid. In this paper, it did the detection of photovoltaic power generation system of the solar energy demonstration power plant, and observed the fluctuation of grid output power of photovohaic power generation system and other factors, analyzed the caused harmonic problem of power quality in low voltage distributing network. It did simulation comparison to the signal by using modem spectral estimation algorithm and traditional Fourier analysis method, the result shows that modem spectral estimation algorithm can get more accurate various harmonics.