摘要
基于LC振荡换流的机械式直流断路器能够抑制开断电弧,可靠切除故障线路,保障系统安全运行。为分析机械式直流断路器拓扑参数对其开断的影响,基于人工过零点抑弧原理,在MATLAB/Simulink中搭建直流断路器仿真模型,分析不同模型下电弧抑制效果。在此基础上,针对断路器不同换流方式下的拓扑参数进行电弧抑制仿真,讨论可控参数与不可控参数对燃弧时长的影响。仿真结果表明,在强制振荡与自激振荡换流方式下可控参数对燃弧时长的影响不同,电弧时间常数、电弧散热功率等不可控参数对燃弧时长影响相同。该研究成果可为直流断路器抑弧拓扑设计提供有效参考。
The mechanical DC circuit breaker based on LC oscillating commutation can suppress the breaking arc,reliably remove the faulty line,and ensure the safe operation of the system.In order to analyze the influence of topological parameters of mechanical DC circuit breaker on its breaking,based on the principle of artificial zero-crossing arc suppression,a simulation model of DC circuit breaker is built in MATLAB/Simulink,and the effect of arc suppression under different models is analyzed.On this basis,the arc sup⁃pression simulation is carried out for the topology parameters of the circuit breaker under different commutation modes,and the influ⁃ence of controllable parameters and uncontrollable parameters on the arcing duration is discussed.The simulation results show that in forced oscillation and self-excited oscillation commutation modes,controllable parameters have different effects on arcing duration,and uncontrollable parameters such as arc time constant and arc heat dissipation power have the same effect on arcing duration.This research results can provide effective reference for the design of arc suppression topology for DC circuit breakers.
作者
孔令哲
何柏娜
李辉
娄辉
边晨曦
孟凡涛
戴雪婷
刘雨佳
KONG Lingzhe;HE Baina;LI Hui;LOU Hui;BIAN Chenxi;MENG Fantao;DAI Xueting;LIU Yujia(College of Electric and Electronic Engineering,Shandong University of Technology,Zibo,Shandong 255000,China;China Electric Power Research Institute Co.,Ltd.,Wuhan 430000,China)
出处
《南方电网技术》
CSCD
北大核心
2024年第2期39-46,共8页
Southern Power System Technology
基金
国家重点研发计划资助项目(2021YFB2401104)
山东省自然科学基金资助项目(ZR2021ME057)
山东省研究生教育质量提升计划项目(SDYAL2022114)。
关键词
直流断路器
电弧模型
振荡电路
强制振荡
自激振荡
燃弧时长
DC circuit breaker
arc model
oscillatory circuit
forced oscillation
self-exctied oscillation
arc duration
