电力系统保护与控制2025，Vol.53Issue(20)：11-22,12.DOI:10.19783/j.cnki.pspc.241715
考虑大规模多类型馈入源的配电网三相短路故障稳态电流实用计算方法
A practical method for steady-state current calculation of three-phase short-circuit faults in distribution networks considering large-scale multi-type feeding sources
摘要
Abstract
With the large-scale integration of new energy stations and induction motors into distribution networks,their impact on the short-circuit current characteristics of the network has become increasingly significant.Existing short-circuit current calculation methods are difficult to accurately reflect the combined effects of these diverse feeding sources.Therefore,this paper proposes a steady-state current calculation method for three-phase short-circuit faults in distribution networks with large-scale multi-type feeding sources.First,the waveform of the three-phase short-circuit current fed by induction motors during faults is fitted through waveform modelling,and an equivalent relationship is established between a detailed distribution network model and its equivalent model.Then,simulation results verify that the equivalent model has high consistency with the detailed model in both steady-state and transient characteristics.Finally,under conditions of large-scale integration of new energy stations and induction motors,the equivalent models of new energy stations and distribution networks are jointly represented as voltage-controlled current sources for calculating the steady-state current of three-phase short-circuit faults.Simulation results show that the proposed method has high computational accuracy and strong engineering practicality.关键词
新能源场站/感应电动机/波形拟合/压控电流源/故障稳态电流Key words
new energy station/induction motor/waveform fitting/voltage-controlled current source/fault steady-state current引用本文复制引用
李祺平,李保宏,张英敏,江琴,王曦,陈亮..考虑大规模多类型馈入源的配电网三相短路故障稳态电流实用计算方法[J].电力系统保护与控制,2025,53(20):11-22,12.基金项目
This work is supported by the Natural Science Foundation of Sichuan Province(No.2025NSFSC2037). 四川省自然科学基金项目资助(2025NSFSC2037) （No.2025NSFSC2037）
