基于虚拟同步发电机的光伏并网控制研究

Research on Photovoltaic Grid Connection Control Based on Virtual Synchronous Generator

近年来,各类清洁能源犹如雨后春笋般地出现,光伏并网发电技术具有过程简单、低噪声、无污染等优点,发展速度不断加快,对大电网的影响日益加深,已成为全球最有发展前景的新能源发电技术。简要介绍了光伏并网发电系统的结构与分类,通过建立光伏发电单元仿真模型,探讨基于虚拟同步发电机(VSG)的光伏并网LVRT控制策略,实现光伏并网系统无缝切换控制,以满足光伏逆变器电源并网运行的技术需求。

In recent years,various types of clean energy have sprung up like bamboo shoots after a rain.Photovoltaic grid connected power generation technology has the advantages of simple process,low noise,and no pollution.Its development speed is accelerating,and its impact on the large power grid is deepening.It has become the most promising new energy source power generation technology in the world.The structure and classification of photovoltaic grid-connected power generation systems are briefly introduced.By establishing a simulation model of photovoltaic power generation units,the photovoltaic grid-connected LVRT control strategy based on virtual synchronous generators(VSGs)is discussed to achieve seamless switching control of photovoltaic grid-connected systems,in order to meet the technical requirements of photovoltaic inverter power source grid-connected operation.