基于自适应电流补偿的VSG增强功率解耦控制策略研究

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DO1：10. 15938/j. emc.2025.04.008

中图分类号：TM46;TK513.5 文献标志码：A 文章编号：1007-449X（2025）04-0073-14

Research on enhanced power decoupling control strategy for VSG based on adaptive current compensation

I Jingsong'， XU Xinyu1， LI Guofeng]， CHEN Chao²， WANG Shuzheng³， LIU Jianben4 （1.School of ElectricalEngineering，Dalian Universityof Technology，Dalian 116O24，China；2.Hydrogen Energyand Multi-energy Complementary Microgrid Enginering Technology Research Centerof Sichuan Province，Sichuan DIWEI Energy Technology Co.，Ltd.，Mianyang 621Ooo，China；3.Jiangsu Collborative Innovation Center for Smart Distribution Network，Nanjing Instituteof Technology，Nanjing 211167，China；4.StateKeyLaboratoryof PowerGridEnvironmental Protection，China Electric Power Research Institute，Wuhan 43OO74，China）

Abstract ：Aiming at the problem that when the virtual synchronous generator （VSG） operates on medium and low voltage lines，power coupling occurs，resulting in the limitation of the output capacity of the converter.Firstly，the power coupling mechanism of the VSG was explored，and it is concluded that the cause lies in that the power angle θ and the impedance angle θzg under medium and low voltage conditions cannot meet the theoretical assumption conditions，leading to the existence of a coupling term in the output power. Then，the control defects of the virtual inductance（VI） were analyzed and improved. Meanwhile，considering the power angle disturbance and voltage changes，the magnitude of the required power compensation was derived to correct the power loop，so as to eliminate the fluctuation of the reactive power output by the VSG when the system was disturbed. Finally，an enhanced power decoupling strategy of the VSG based on adaptive current compensation （ACC） was proposed， which significantly improves the degree of decoupling and further enhances the stability of the control system under non-ideal power grids. Finally，simulations were caried out under various working conditions，demonstrating that the proposed method can better deal with the power coupling problem.

Keywords： virtual synchronous generator; virtual inductance； power decoupling；power angle compensation；voltage compensation

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