中国电机工程学报2026，Vol.46Issue(17)：6179-6192,中插4,15.DOI:10.13334/j.0258-8013.pcsee.251417
构网变流器故障期间维持电压源特征的暂态电流解析计算及参数可行域分析
Transient Current Analytical Calculation and Parameter Feasibility Region Analysis for Grid-forming Converters Maintaining Voltage Source Characteristics During Faults
摘要
Abstract
To address the key challenge of quantitatively characterizing the ability and conditions for grid-forming converters to maintain voltage source characteristics during fault conditions,this paper first proposes an analytical method for fault current calculation by decoupling the reactive power-voltage control loop from the electromagnetic transient behavior of the network.This method transforms the originally complex and analytically intractable second-order differential equations into two simple first-order differential equations that can be solved sequentially.Then,to quantify and characterize the capability and boundary conditions for grid-forming converters to maintain voltage source characteristics during faults,this paper defines a two-dimensional visualizable parameter feasible region with the fault voltage drop at the point of common coupling(UgF)and the virtual inductance(Lv)as key parameters.A practical characterization method for the parameter feasible region based on the boundaries and vertices is proposed for the first time.Specifically,the critical vertices of the UgF-Lv feasible region are determined based on the constraints of the maximum overcurrent capability of grid-forming converters and the internal potential saturation limit.Subsequently,the practical boundary of the UgF-Lv feasible region is characterized based on its near-linear geometric property.Finally,the effectiveness of the characterized parameter feasible region is validated through experiments on an RT-Lab-based hardware-in-the-loop experimental platform.关键词
构网变流器/电压源特征/故障电流解析计算/参数可行域Key words
grid-forming converter/voltage source characteristic/analytical calculation of fault current/parameter feasible region分类
信息技术与安全科学引用本文复制引用
李霞林,贾昊琛,禹海峰,王中冠,周旭,王智,郭力..构网变流器故障期间维持电压源特征的暂态电流解析计算及参数可行域分析[J].中国电机工程学报,2026,46(17):6179-6192,中插4,15.基金项目
国家重点研发计划项目(2023YFB2406700) （2023YFB2406700）
国家自然科学基金项目(52477118) （52477118）
国家自然科学基金(联合项目)(U24B2080). National Key R&D Program of China(2023YFB2406700) （联合项目）
Project Supported by National Natural Science Foundation of China(52477118) （52477118）
Project Supported by National Natural Science Foundation of China(Joint Program)(U24B2080). （Joint Program）
