Improved Strategy of Grid-Forming Virtual Synchronous Generator Based on Transient Damping  

作　　者：Lei Zhang Rongliang Shi Junhui Li Yannan Yu Yu Zhang 

机构地区：[1]Key Laboratory of Advanced Manufacturing and Automation Technology,Education Department of Guangxi Zhuang Autonomous Region,Guilin University of Technology,Guilin,541006,China [2]Key Laboratory of Modern Power SystemSimulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin,132011,China

出　　处：《Energy Engineering》2024年第11期3181-3197,共17页能源工程（英文）

基　　金：supported by the Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Northeast Electric Power University)Open Fund of China under Grant MPSS2024-08.

摘　　要：The grid-forming virtual synchronous generator(GFVSG)not only employs a first-order low-pass filter for virtual inertia control but also introduces grid-connected active power(GCAP)dynamic oscillation issues,akin to those observed in traditional synchronous generators.In response to this,an improved strategy for lead-lag filter based GFVSG(LLF-GFVSG)is presented in this article.Firstly,the grid-connected circuit structure and control principle of typical GFVSG are described,and a closed-loop small-signal model for GCAP in GFVSG is established.The causes of GCAP dynamic oscillation of GFVSG under the disturbances of active power command as well as grid frequency are analyzed.On this basis,the LLF-GFVSG improvement strategy and its parameter design method are given.Finally,the efficiency of the proposed control strategy in damping GCAP dynamic oscillations under various disturbances is verified using MATLAB simulations and experimental comparison results.

关 键 词：Grid-forming virtual synchronous generator first-order low-pass filter lead-lag filter small-signal model parameter design 

分 类 号：TM341[电气工程—电机]