摘要
随着新型电力系统建设进程的加速,新能源等电力电子化电源在系统中渗透率不断提高,电网强度随之减弱,系统安全性受到挑战。部分变流器亟需采用构网型控制,而下垂控制就是一种经典的构网型控制策略;作为对下垂控制策略的有效改进手段,虚拟阻抗技术受到广泛关注。在国内外研究人员共同推动下,虚拟阻抗技术目前已取得较为丰富的理论研究及实践成果,具有广阔的应用前景。围绕虚拟阻抗在构网型下垂控制中的主要定位及作用机理进行了分析,对虚拟阻抗的典型改进方法和发展现状进行了梳理总结,并结合目前的研究进展及趋势,对虚拟阻抗技术的研究前景、未来可能面临和需要解决的关键问题进行了分析、探讨和研判。
With the acceleration of the construction process of the new power system,the penetration rate of new energy and other power electronic sources in the system continues to increase,the strength of the power grid weakens,and the system security is challenged.Some converters urgently need to adopt grid-forming control,and droop control is a classic grid-forming control strategy.Virtual impedance technology has received widespread attention as an effective improvement method for droop control strategy.With the joint efforts of domestic and foreign researchers,virtual impedance technology has achieved rich theoretical research and practical results and has broad application prospects.This paper analyzes the main positioning and mechanism of virtual impedance in grid-forming droop control,summarizes typical improvement methods and development status of virtual impedance,and combines current research progress and trends to analyze,explore,and judge the research prospects,the key problems may be faced and need to be solved in the future of virtual impedance technology.
作者
范宸珲
秦晓辉
齐磊
丁保迪
刘宏志
孟政吉
FAN Chenhui;QIN Xiaohui;QI Lei;DING Baodi;LIU Hongzhi;MENG Zhengji(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China;State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,Hebei Province,China;Hebei Key Laboratory of Energy Internet Simulation Modeling and Control(State Grid Hebei Electric Power Research Institutes),Shijiazhuang 050021,Hebei Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2024年第6期2237-2250,I0001,I0002,共16页
Power System Technology
基金
国家电网有限公司科技项目(5500-202355718A-3-3-JC):“新型电力系统构网形态及构网型变流器优化配置研究”。
关键词
虚拟阻抗
构网型
下垂控制
作用机理
研究前景
virtual impedance
grid-forming(GFM)
droop control
function mechanism
research prospects
