两级式光伏并网发电控制系统仿真分析

阐述了两级式光伏并网发电控制系统的结构及其控制过程,建立了光伏阵列模型和光伏并网发电系统模型,利用光伏阵列模型模拟了光照条件变化时光伏并网系统的输出情况进行仿真分析。实验表明,此两级式光伏并网发电系统能迅速有效地跟踪到光伏阵列的最大功率点,而且能够控制并网电流的波形,使逆变器的输出电流与电网电压同频同相,保证电流输出波形为正弦波。

Simulation Analysis of Two-Stage Grid-connected PV Control System

This paper introduces the structure and control of two-Stage grid-connected photovoltaic control system establishes photovoltaic array model and grid-connected photovoltaic model and simulates the output of grid-connected photovoltaic system with the change of illumination by photovoltaic array model.The results show that this two-level grid-connected photovoltaic system quickly and effectively tracks the maximum power point in photovoltaic array,accurately tracks the voltage phase as for grid-connected current control,assures the output current of inverter and the grid voltage of the same frequency and phase and guarantees the sinusoidal waveform with few ripples of current output.