柔性直流输电系统中虚拟同步发电机技术研究综述  

Review of Virtual Synchronous Generator Technology in the VSC-HVDC System

作　　者：赵莹萍 潘欢 姜汉周 ZHAO Ying-ping;PAN Huan;JIANG Han-zhou(School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan 750021,China;Ningxia Key Laboratory of Electrical Energy Security,Yinchuan 750004,China)

机构地区：[1]宁夏大学物理与电子电气工程学院,宁夏银川750021 [2]宁夏电力能源安全重点实验室,宁夏银川750004

出　　处：《电工电气》2022年第8期1-7,共7页Electrotechnics Electric

基　　金：国家自然科学基金项目(61763040)。

摘　　要：虚拟同步发电机技术(VSG)通过对同步发电机(SG)的惯性响应和有功-频率下垂特性的模拟,可为交流网络提供频率支撑。介绍了基于电压源换流器的柔性直流输电(VSC-HVDC)系统的发展以及换流器控制方式,对能为本地交流网络以及互联的异步交流网络提供频率支撑的VSG技术进行了解释;基于现有学术研究,对VSC-HVDC系统中VSG控制技术的应用进行综述;阐述了VSG控制中引入直流电压控制以及采用多VSG并联控制有可能会出现的问题,指出如何克服或减小该问题的影响是未来研究的方向。Virtual synchronous generator(VSG) provides frequency support to AC networks by simulating inertial response and droop characteristics of the active power frequency of the synchronous generator (SG).This paper introduced the VSC-HVDC system development and the control mode of the converter.Moreover,it elaborated on the VSG technology,which could provide frequency support for local AC networks and interconnected asynchronous AC networks.In addition,it summarized the application of VSG control technology in the VSC-HVDC system based on the existing academic research.Besides,this paper described the possible problems of introducing DC voltage control into VSG control and used multiple VSG parallel control.In sum,this study points out that the research direction could be how to overcome those problems or reduce the impacts.

关 键 词：虚拟同步发电机 柔性直流输电 频率支撑 换流器控制 直流电压控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]