摘要
介绍了逆变器的下垂控制和VSG控制的两种不同的并网控制策略,并分别建立了下垂控制和VSG控制并网时的输出功率方程,分析了下垂控制并网时具有较快响应的原因。借鉴下垂控制的优点,通过对VSG控制方式加入比例微分环节,引入有功输出及有功参考闭环反馈来改善系统的动态特性。仿真结果表明,所提出的优化策略能优化VSG的系统阻尼,改善逆变器并网运行的动态特性。
In this paper,two different grid-connected control strategies of inverter droop control and VSG control are introduced. On this basis,the output power equations of droop control and VSG control are established respectively,and the reason why the droop control has a faster response is analyzed. Drawing on the advantages of droop control,the active output and the active reference closed-loop feedback are introduced to improve the dynamic characteristics of VSG control system are improved by adding proportional differential link. The simulation results show that the proposed optimization strategy can optimize the system damping of VSG and improve the dynamic characteristics of grid-connected inverter.
作者
张亚亚
葛鹏
安允展
瞿吉
葛家宁
周磊
ZHANG Yaya;GE Peng;AN Yunzhan;QU Ji;GE Jianing;ZHOU Lei(Electric Power Simulation and Control Engineering Center,Nanjing Institute of Technology,Nanjing 211167,China)
出处
《电工技术》
2019年第5期15-18,共4页
Electric Engineering
关键词
逆变器
VSG
下垂控制
阻尼特性
inverter
VSG
droop control
damping characteristics
