高电压技术2025，Vol.51Issue(12)：6063-6072,中插25-中插26,12.DOI:10.13336/j.1003-6520.hve.20242020
基于虚拟直流电容的并网变换器虚拟同步发电机控制策略
Virtual Synchronous Generator Control Strategy for Grid-connected Converter Based on Virtual DC Capacitor
LIU Xiaokui 1DUAN Shanxu 1HE Taihang 1BAI Chenxi 1CHEN Changsong1
作者信息
- 1. State Key Laboratory of Advanced Electromagnetic Technology,Huazhong University of Science and Technology,Wuhan 430074,China
- 折叠
摘要
Abstract
As the penetration rate of renewable energy increases,the grid-connected converters(GCCs)need to have grid-forming capabilities.However,existing virtual synchronous generator(VSG)control lacks the interaction with dc-side units,which may lead to reduction inrenewable energy utilization efficiency or dc-link voltage collapse.This pa-per quantitatively analyzes the relationship between DC inertia and AC inertia.To solve the problem of limited inertia of dc-link capacitor,a VSG control strategy based on virtual DC capacitor is proposed,which enables the DCMG to provide virtual inertia equivalent to the inertia time constant of traditional synchronous generator for the AC grid.The proposed VSG control strategy can also effectively coordinate the dc-link voltage control.Simulation and experimental results val-idate the functionality and effectiveness of the proposed control strategy.关键词
直流微电网/直流电压控制/虚拟同步发电机/惯量支撑/虚拟直流电容Key words
DC microgrids/DC-link voltage control/virtual synchronous generator/inertia support/virtual DC capacitor引用本文复制引用
LIU Xiaokui,DUAN Shanxu,HE Taihang,BAI Chenxi,CHEN Changsong..基于虚拟直流电容的并网变换器虚拟同步发电机控制策略[J].高电压技术,2025,51(12):6063-6072,中插25-中插26,12.
