隔离开关触点静态接触下热稳定性研究
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摘要
为了研究GW4-220 kV高压隔离开关热稳定性,在建立矩形和W形截面触指触点静态接触下接触系统稳、瞬态数学模型和有限元模型的基础上,从理论和仿真两方面研究了隔离开关在50 kA/3 s下的热稳定性。结果表明:导电回路发热主要出现在接触系统,而接触处发热又主要为接触电阻发热,最高温度出现在接触线处;在承受短路电流50 kA/3 s时,热稳定性较差;W形截面触指系统最大温升明显小于矩形截面触指系统。
In order to study the thermal stability of the GW4-220 kV high voltage disconnector,based on the establishment of mathematical model and finite element model for contact finger of rectangular section and"W"section,the thermal stability of disconnector under 50 kA/3 s is studied theoretically and simulated.The results show that:conductive loop's fever mainly appears in contact system and contact system's fever mainly occurs in contact resistance.Besides,the total temperature appears in contact line.The thermal stability is bad,when the transient current which is 50 k A/3 s is applied.The"W"section's total temperature is smaller than that of rectangular section's contact finger.
In order to study the thermal stability of the GW4-220 kV high voltage disconnector,based on the establishment of mathematical model and finite element model for contact finger of rectangular section and"W"section,the thermal stability of disconnector under 50 kA/3 s is studied theoretically and simulated.The results show that:conductive loop's fever mainly appears in contact system and contact system's fever mainly occurs in contact resistance.Besides,the total temperature appears in contact line.The thermal stability is bad,when the transient current which is 50 k A/3 s is applied.The"W"section's total temperature is smaller than that of rectangular section's contact finger.
引文
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[12]张冠生.电器学基础理论[M].北京:机械工业出版社,1989.ZHANG Guansheng.Fundamental theory of electromagnetic devices[M].Beijing:China Machine Press,1989.
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[15]HOLM R.Electrical contacts handbook[M].Heidelberg:Springer-Verlag,1958.
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[18]张伟.高压隔离开关触头导电性失效研究[D].北京:华北电力大学,2011.ZHANG Wei.The contact electrical conductivity failure of high voltage separate switch[D].Beijing:North China Electric Power University,2011.
[19]李震彪.电触头材料抗静熔焊能力研究[J].中国电机工程学报,1994,14(1):34-36.LI Zhenbiao.Static welding resistance of electric contact materials[J].Chinese Society for Electrical Engineering,1994,14(1):34-36.
[20]李震彪.电触头材料及其不同配对时抗动熔焊能力的研究[J].电工技术学报,1993,8(3):1-5.LI Zhenbiao.The inverstigation on dynamic welding resistance of electric contact materials and their pairings[J].Transactions of China Electrotechnical Society,1993,8(3):1-5.
[2]程礼椿.电接触理论及应用[M].北京:机械工业出版社,1988.CHENG Lichun.Electrical contact theory and application[M].Beijing:China Machine Press,1988.
[3]姚文华.电触点材料接触电阻分析[J].电工材料,2005(3):22-25..YAO Wenhua.An analysis of contact resistan-ce about electrical contact materials[J].Electrical Engineering Alloy,2005(3):22-25.
[4]刘卫峰.高压隔离开关自力型触指结构优化设计及其成形技术研究[D].洛阳:河南科技大学,2011.LIU Weifeng.Optimization design and study of formability on self-elastic contact finger used in the high voltage isolating switch[D].Luoyang:Henan University of Science and Technology,2011.
[5]程礼椿.论接触电阻模型与应用问题[J].高压电器,1993,29(2):34-40..CHENG Lichun.The problems of contact resist-ance models and their applications[J].High Voltage Apparatus,1993,29(2):34-40.
[6]HOLM R.Electric contacts theory and application[M].Heidelberg:Springer-Verlag,1967.
[7]梁慧敏,李博,由佳欣.基于有限元法的隔离开关热稳定性仿真分析[J].低压电器,2011(1):9-12.LIANG Huimin,LI Bo,YOU Jiaxin,et al.Thermal stability simulation analysis of disconnect switch based on finite element method[J].Low Voltage Apparatus,2011(1):9-12.
[8]李奎,陆俭国,张冠生.电器触点静态接触下热过程的数学分析[J].高压电器,1997,33(3):31-35.LI Kui,LU Jianguo,ZHANG Guansheng.The mathmatical analysis for the thermal process of apparatus contact on the constraints of static contact[J].High Voltage Apparatus,1997,33(3):31-35.
[9]钟振蛟.户外隔离开关导电回路过热的原因及对策[J].高压电器,2005,41(4):307-309.ZHONG Zhenjiao.The causes and countermeasures for the overheat of conducting circuit for outdoor disconnector[J].High Voltage Apparatus,2005,41(4):307-309.
[10]宋帆,申春红,林莘,等.800 kV GIS隔离开关-磁场-温度场计算与分析[J].高电压技术,2008,34(7):1383-1388.SONG Fan,SHEN Chunhong,LIN Xin,et al.Calculation and analysis on magneto-thermal fields of 800 kV GISdisconnector[J].High Voltage Engineering,2008,34(7):1383-1388.
[11]杨世铭,陶文铨.传热学[M].第3版.北京:北京高等教育出版社,1998.YANG Shiming,TAO Wenquan.Heat transfer[M].Third Edition.Beijing:Higher Education Press,1998.
[12]张冠生.电器学基础理论[M].北京:机械工业出版社,1989.ZHANG Guansheng.Fundamental theory of electromagnetic devices[M].Beijing:China Machine Press,1989.
[13]塔耶夫H C.电器学[M].任耀先,译.北京:机械工业出版社,1981.CHETAEV H C Electromagnetic devices[M].REN Yaoxian,Translate.Beijing:China Machine Press,1981.
[14]李震彪,程礼椿.短路电流下的电器发热分析[J].低压电器,1995(6):28-30.LI Zhenbiao,CHENG Lichun.Heat analysis of apparatus on the constraints of short circuit[J].Low Voltage Apparatus,1995(6):28-30.
[15]HOLM R.Electrical contacts handbook[M].Heidelberg:Springer-Verlag,1958.
[16]GERBER M,FERRERRA J A.An improved 3D integrated DC converter for high temperature environments[C]//35th Annual IEEE Power Electronics Specialists Conference.[S.l.]:IEEE,2004:2779-2785.
[17]TROWBRIDGE C W.Electromagnetic computing:The way ahead[J].IEEE Transactions on Magnetics,1988,24(1):3218.
[18]张伟.高压隔离开关触头导电性失效研究[D].北京:华北电力大学,2011.ZHANG Wei.The contact electrical conductivity failure of high voltage separate switch[D].Beijing:North China Electric Power University,2011.
[19]李震彪.电触头材料抗静熔焊能力研究[J].中国电机工程学报,1994,14(1):34-36.LI Zhenbiao.Static welding resistance of electric contact materials[J].Chinese Society for Electrical Engineering,1994,14(1):34-36.
[20]李震彪.电触头材料及其不同配对时抗动熔焊能力的研究[J].电工技术学报,1993,8(3):1-5.LI Zhenbiao.The inverstigation on dynamic welding resistance of electric contact materials and their pairings[J].Transactions of China Electrotechnical Society,1993,8(3):1-5.