VFTO仿真中隔离开关电弧模型研究  

Research on Arc Model of Disconnecting Switch in VFTO Simulation

作　　者：宋坤宇 刘春[3] 王增彬 SONG Kunyu;LIU Chun;WANG Zengbin(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Guangdong Key Laboratory of Electric Power Equipment Reliability,Guangzhou 510080,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]广东省电力装备可靠性企业重点试验室,广东广州510080 [3]华中科技大学电气与电子工程学院,强电磁工程与新技术国家重点试验室,湖北武汉430074

出　　处：《电工技术》2020年第11期17-22,共6页Electric Engineering

基　　金：广东电网公司科技项目“给予多物理场的高压开关设备故障仿真关键技术研究”(编号GDKJXM20180154)。

摘　　要：对目前常用的电弧模型(包括理想开关模型、定值电阻模型、时变电阻模型、黑盒模型及火花电阻模型)进行了总结,阐述了各模型原理及数学模型,同时分析了各模型的优缺点。基于IEC典型隔离开关操作回路,对上述电弧模型进行了ATP-EMTP仿真分析,得出不同电弧模型对负载侧电压峰值、电流峰值、VFTO陡度及VFTO持续时长的影响规律。计算结果表明,若仅考虑VFTO峰值与陡度,则指数模型能以简单的模型计算出较为一致的结果;若考虑电弧多次重击穿,则分段电弧模型更符合电弧的发展机理。In this paper,commonly used arc models including ideal-switch model,constant-resistance model,time-varying resistance model,black box model and spark resistance model are summarized.The principles and mathematical models of each model are expounded,and the advantages and disadvantages are analyzed.Base on the IEC typical isolation switch operating circuit,ATP-EMTP simulation analysis is performed on the above arc models.The effects of different arc models on the load-side voltage peak,current peak,VFTO gradient and duration are obtained.The calculation results show that if only the VFTO peak and gradient are considered,the exponential model can be a simple model to obtain more consistent results;if the multi-arc restriking is taken into consideration,the subsection arc model is more in line with the mechanism of arc development.

关 键 词：VFTO 电弧电阻模型 陡度 持续时长 

分 类 号：TM743[电气工程—电力系统及自动化]