中国电机工程学报2024，Vol.44Issue(15)：6010-6022,中插14,14.DOI:10.13334/j.0258-8013.pcsee.230297
基于自适应动态虚拟同步阻抗的虚拟同步机功率解耦策略
Power Decoupling Strategy for Virtual Synchronous Generator Based on Adaptive Dynamic Virtual Synchronous Impedance
摘要
Abstract
When employed in operating scenarios where the weak grid is susceptible to significant power angle swings and the transmission lines exhibit a high impedance ratio,the virtual synchronous generator(VSG)encounters severe coupling between active and reactive power.This coupling can potentially lead to power steady-state errors,dynamic oscillations in the VSG,and in severe cases,even system instability.By establishing a wide frequency domain dynamic power coupling model of the virtual synchronous generator,the dynamic relative gain array is used to analyze the VSG power coupling mechanism.On this basis,a virtual synchronous generator power decoupling strategy based on adaptive dynamic virtual synchronous impedance is proposed,which can dynamically eliminate the coupling effect between VSG power loops.Through the comparative analysis of the small signal model,it is proved that the decoupling strategy can effectively improve the stability of the VSG system.Finally,the PSCAD/EMTDC simulation verifies that the proposed method can not only effectively eliminate the power coupling,but also further improve the VSG power dynamic response performance.关键词
虚拟同步发电机/功率耦合/动态相对增益阵列/动态解耦/自适应虚拟阻抗Key words
virtual synchronous generator(VSG)/power coupling/dynamic relative gain array/dynamic decoupling/adaptive virtual impedance分类
信息技术与安全科学引用本文复制引用
张林,张海波,蒋维勇,李凯..基于自适应动态虚拟同步阻抗的虚拟同步机功率解耦策略[J].中国电机工程学报,2024,44(15):6010-6022,中插14,14.基金项目
国家电网有限公司科技项目(5108-202218280A-2-264-XG). Science and Technology Project of State Grid Corporation of China(5108-202218280A-2-264-XG). （5108-202218280A-2-264-XG）
