基于虚拟同步发电机的光伏并网控制技术研究

Research on grid-connected control technology of PV based on virtual synchronous generator

光伏电站的输出功率受光照强度、温度等环境因素影响,具有强烈的波动性。为提高光伏并网的效能并对电网质量进行保护,虚拟同步发电机是一种较为常见的技术手段。文章在分析光伏发电并网特征的基础上,重点从功率跟踪控制、电力电子变换控制和光伏并网保护3个方面探讨虚拟同步发电机技术的具体实现与应用,并对其控制效果进行仿真评价,以实现对光伏电站的并网控制。

The output power of photovoltaic power stations is affected by environmental factors such as light intensity and temperature,and has a strong fluctuation.Therefore,in order to improve the efficiency of photovoltaic grid-connection and protect the quality of power grid,virtual synchronous generator is a more common technology and means.Based on this,on the basis of analyzing the grid-connected characteristics of photovoltaic power generation,this paper focuses on the specific implementation and application of virtual machine technology from three aspects,such as power tracking control power electronic transformation control and photovoltaic grid-connected protection,and carries out simulation evaluation of its control effect,in order to achieve grid-connected control of photovoltaic power plants.