电气传动2026，Vol.56Issue(6)：16-21,6.DOI:10.19457/j.1001-2095.dqcd26516
基于虚拟功率的非计划性VSG并离网平滑切换控制策略
Control Strategy for Seamless Unplanned Transition Between Grid-connected and Islanded Modes of VSG Based on Virtual Power
摘要
Abstract
To address the large inrush current during the switching of a virtual synchronous generator(VSG)from off-grid to grid-connected,and the stability issues of traditional pre-synchronization schemes,a control method for the phase-locked loop(PLL)pre-synchronization unit to be cut off in non-grid-connected time was proposed.First,based on the VSG's rotor motion and excitation equations,the main factors affecting the inrush current at closing were identified.Then,considering the physical model of virtual reactance and the characteristics of virtual power output,a virtual power pre-synchronization scheme combining virtual reactance and band-pass filtering was developed.Finally,the effectiveness of proposed method was verified through 2 kW simulations and experiments.Results show that proposed method enables smooth switching between off-grid and grid-connected modes and allows for the removal of the pre-synchronization unit at any time after grid connection,demonstrating good stability.关键词
虚拟同步发电机/合闸/冲击电流/预同步/虚拟功率/虚拟电抗/平滑切换Key words
virtual synchronous generator(VSG)/closing/inrush current/pre-synchronization/virtual power/virtual reactance/smooth transition分类
信息技术与安全科学引用本文复制引用
丁津津,彭勃,张峰,毛荀..基于虚拟功率的非计划性VSG并离网平滑切换控制策略[J].电气传动,2026,56(6):16-21,6.基金项目
国网安徽省电力有限公司科技项目(B3120523000G) （B3120523000G）
