电力系统保护与控制2025，Vol.53Issue(19)：1-12,12.DOI:10.19783/j.cnki.pspc.241514
基于电能路由器的新型配电系统接地故障柔性降压消弧
Flexible voltage arc suppression for single line-to-ground fault in distribution systems based on power routers
摘要
Abstract
With the increasing use of cables in distribution networks,it has become more difficult to extinguish arcs in single line-to-ground(SLG)faults.To address this,a novel and flexible voltage arc suppression technique for SLG faults in distribution networks based on power routers(PR)is proposed.First,a modular multilevel converter(MMC)-based PR topology with a grounded high-voltage DC is introduced.A proportional integral resonance(PIR)controller in the dq0 synchronous rotating frame(SFR)is applied to track the zero-axis vector without steady-state error.This enables real-time regulation of the system zero-sequence voltage so that it matches the magnitude but opposes the phase of the power source electromotive force of the faulty phase.As a result,the fault phase voltage is suppressed below the arc reignition voltage at the fault point,achieving active voltage arc suppression for grounding faults.Then,by precisely controlling the linear reduction of the system zero-sequence voltage and observing whether the zero-sequence current varies linearly with it,the method can determine whether the fault is transient.Considering various fault conditions,MATLAB/Simulink simulations show that the fault phase voltage can be reduced to about 10 V.Further experiments on a physical system platform verify the effectiveness and reliability of the proposed PR-based flexible voltage arc suppression method.关键词
消弧/配电网/接地故障/电能路由器/新型电力系统Key words
arc suppression/distribution network/grounding fault/power router/new type power system引用本文复制引用
江浪,窦真兰,尹项根,陈卫,赖锦木,陈俊宏,文明浩,韩霄..基于电能路由器的新型配电系统接地故障柔性降压消弧[J].电力系统保护与控制,2025,53(19):1-12,12.基金项目
This work is supported by the Key Project of National Natural Science Foundation of China(No.52337006). 国家自然科学基金(重点项目)资助(52337006) （No.52337006）
