基于虚拟同步机的微网逆变器并网技术研究

Research on Grid Connected Inverter Based on Virtual Synchronous Generator

并网逆变器的有功和无功负荷如何分配是微电网要解决的关键技术问题。虚拟同步发电机(VSG)通过模拟传统同步发电机的特性,从而实现并网逆变器的控制,其可根据电网电压和频率变化自动调节输出有功和无功功率,无需系统监控协调。基于此特点,VSG并网技术正逐渐受到人们的关注。结合中国电力科学研究院"VSG样机研制"项目,对VSG并网技术展开深入研究。

Active and reactive power allocation of each inverter is the key technology to solve the problem of micro grid.In order to realize the control of grid connected inverter,virtual synchronous generator（VSG） is proposed by simulation of the characteristics of the conventional synchronous generator, it can adjust the output active and reactive power without the need of coordination and monitoring systems, according to grid voltage and frequency changes automatically.Based on this characteristic,the VSG technology is gradually drawing people＇s attention and research.Indepth research on VSG grid technology is carried out,which based on ＂VSG prototype research＂ project by chinese electric power research institute.