电器与能效管理技术Issue(9)：8-14,7.DOI:10.16628/j.cnki.2095-8188.2024.09.002
基于虚拟同步发电机控制的故障穿越策略
Fault Ride Through Strategy Based on Virtual Synchronous Generator Control
摘要
Abstract
Virtual synchronous generator(VSG)technology generates its own phase by simulating the characteristics of the generator,and achieves accurate power output through appropriate phase angles,which has better grid characteristics.Firstly,the basic principles of VSG control is explained,then the causes of overcurrent and instability during power grid faults are analyzed.Based on this,an optimized fault ride through strategy is proposed.This strategy achieves current limiting and voltage support of VSG by calculating the output voltage of VSG,reduces the active power reference value to prevent power angle instability,and introduces a negative sequence current loop to suppress three-phase unbalanced current generated under asymmetric faults.Finally,based on the PSCAD/EMTDC simulation platform,a flexible DC model based on VSG control is built,and the correctness and effectiveness of the proposed control strategy is verified.关键词
虚拟同步发电机/故障穿越策略/故障电流限制/失稳Key words
virtual synchronization generator(VSG)/fault ride through strategy/fault current limit/unstability分类
信息技术与安全科学引用本文复制引用
李艳梅,鲁庆华,李泰,胡永昌,苏进国,张艳浩..基于虚拟同步发电机控制的故障穿越策略[J].电器与能效管理技术,2024,(9):8-14,7.基金项目
国家电网有限公司总部管理科技项目资助(5100-202256369A-2-0-ZN) （5100-202256369A-2-0-ZN）
