电气技术2025，Vol.26Issue(4)：1-6,60,7.
增强同步稳定的构网型变流器虚拟惯量限流方法
Virtual inertia current limiting method for grid-forming converters with enhanced synchronous stability
摘要
Abstract
In grid-forming converters with weak overcurrent capability,it is generally necessary to introduce the current limiter to ensure fault current limiting.However,the synchronization stability of the system is weakened after triggering the current limiter,which is seldom comprehensively considered and addressed in existing studies.To this end,the phasor diagram method is used to reveal the fault current characteristics in this paper.Then,the adverse impact of the current limiter on the synchronization stability of the converter is analyzed based on the power angle characteristic curves and the extended equal area criterion.Thus,a virtual inertia current limiting method for grid-forming converters with enhanced synchronous stability is proposed,which simultaneously solves the fault current limiting and synchronous stability problems of converters by quantitatively controlling the virtual inertia.Finally,the correctness of the theoretical analysis and the effectiveness of the proposed method are verified by Matlab/Simulink simulation experiments.关键词
故障限流/同步稳定性/构网型变流器/虚拟惯量/电流限幅Key words
fault current limiting/synchronous stability/grid-forming converter/virtual inertia/current limiter引用本文复制引用
孙东伟,张旸,温步瀛,王怀远..增强同步稳定的构网型变流器虚拟惯量限流方法[J].电气技术,2025,26(4):1-6,60,7.基金项目
福建省自然科学基金项目(2022J01113) （2022J01113）
