电力系统保护与控制2024，Vol.52Issue(19)：1-14,14.DOI:10.19783/j.cnki.pspc.231645
故障相桥臂转移接地消弧装置直流侧电压控制方法
DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device
摘要
Abstract
There is a problem in that the non-fault phase bridge arm of traditional three-phase direct-hanging flexible arc suppression device bears the line voltage.Thus a fault phase bridge arm transfer grounding arc suppression method is proposed.This method controls the fault phase bridge arm transfer grounding through the switch.The bus voltage is shared by the fault phase bridge arm and the non-fault phase bridge arm,and the three-phase bridge arm outputs the current to achieve arc suppression.The cascaded H-bridge DC-link needs an independent power supply,so a distributed voltage balance commutation modulation method is proposed.The modulation method selectively changes the H-bridge output state according to the influence of H-bridge output state and current direction on the charge and discharge of the DC-link capacitor,and then realizes the stability of DC-link voltage.The arc suppression device using this modulation method does not need to be equipped with an independent power supply on the DC side,and can maintain H-bridge DC-link voltage stability during the arc suppression process.Finally,the proposed method is verified by Matlab/Simulink simulation software,and the results prove the effectiveness of the proposed method.关键词
单相接地故障/级联H桥变流器/直流侧电压/消弧/转移接地Key words
single-phase-to-ground fault/cascaded H-bridge converter/DC-link voltage/arc suppression/transfer grounding引用本文复制引用
郭谋发,刘鑫斌,张彬隆,赵国军,郑泽胤..故障相桥臂转移接地消弧装置直流侧电压控制方法[J].电力系统保护与控制,2024,52(19):1-14,14.基金项目
This work is supported by the National Natural Science Foundation of China(No.51677030). 国家自然科学基金项目资助(51677030) （No.51677030）
福建省自然科学基金项目资助(2023J05106) （2023J05106）
