单相光伏并网逆变器的控制策略研究及实现

摘要

According to the characteristic of photovoltaic grid-connected system,the system principle is analysed,the output inductance is calculated, the design and control schemes of photovoltaic grid-connected inverter is proposed, and the system control model is established.The feed-forward of grid-voltage and current tracking technology are applied, the sinusoidal cur-rent of grid side and unity power factor are realized.Finally, the validity of the schemes is verified by experiments.%针对光伏并网系统的特点,分析其工作原理,计算了输出端电感进行.提出了光伏阵列并网发电的设计和控制方案,建立了系统控制模型.运用电网电压前馈和电流跟踪技术,实现了网侧电流止弦化且为单位功率因数.最后通过实验验证了该方案的正确性.