基于并联电容的低压直流断路器机理分析
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关键词：低压直流断路器；并联电容；真空灭弧室；数学模型；外加横向磁场中图分类号：TM561文献标志码：A 文章编号：2095-8188（2025）08-0009-08DOI：10.16628/j.cnki.2095-8188.2025.08.002
Mechanism Analysis of Low Voltage DC Circuit Breaker Based on Parallel Capacitor
YANG Chenxi， JIA Shenli，HUANG Xiaolong， SHEN Saikang （Department of Electrical Engineering，Sichuan University，Chengdu 61OoOo，China
Abstract：Some low voltage DC systemssuch as low-voltage DC distribution network and photovoltaic power generation system have increasingly high requirements for the breaking performanceandeconomy of lowvoltage DC circuit breakers.The traditional lowvoltage DC circuit breaker characterizedby long arcduration and slow breaking speed can not meet the demand，so it is necessary to develop anew type of low voltage DC circuit breaker.In view of thelow voltage DC circuit breaker based onthe shunt capacitance current transfer principle，the working principle are analyzed.Themathematicalmodelofthecurrnttransferprocessisestablishedandtheaccuracyof themathematical modelisverifiedbyexperiments.The transfercurrntunderdiffrentshuntcapacitancevalues isexplored.Themethod of improvingthebreakingabilityoftheDCcircuit breakerbytheactionofthetransversemagneticfieldisproposed and verified byexperiments.TheresearchedlowvoltageDCcircuit breakerhaslowcost，simple structure，fast breakingspeedand high reliability，whichcanbean important reseach direction fornew typelowvoltage DC circuit breaker.
Key words：low voltage DC circuit breaker；parallel capacitor；vacuum interrupter；mathematical nodels；external transverse magnetic field
0 引言
接入的背景下，直流系统凭借其更强的传输能力、灵活性与可控性，已成为电气领域的研究热点[1]其中，低压直流系统的主要应用场景有低压直流配在直流负荷日益增多、新能源分布式电源大量电网、电动飞机机载供电系统、轨道交通系统、户外光伏发电等，与人们的生产生活息息相关[28]。（剩余10621字）
