| 隔离开关触点静态接触下热稳定性研究 |
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| 引用本文： | 邓斌,杨帆,王国志,吴文海.隔离开关触点静态接触下热稳定性研究[J].高压电器,2019,55(2):91-96. |
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| 作者姓名： | 邓斌 杨帆 王国志 吴文海 |
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| 作者单位： | 西南交通大学机械工程学院,成都,610031;西南交通大学机械工程学院,成都,610031;西南交通大学机械工程学院,成都,610031;西南交通大学机械工程学院,成都,610031 |
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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。
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| 关 键 词： | 隔离开关 热-电耦合分析 有限元法 热稳定性 |
Study on Thermal Stability of Disconnetor Contact Under Static Contact |
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| DENG Bin,YANG Fan,WANG Guozhi,WU Wenhai.Study on Thermal Stability of Disconnetor Contact Under Static Contact[J].High Voltage Apparatus,2019,55(2):91-96. |
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| Authors: | DENG Bin YANG Fan WANG Guozhi WU Wenhai |
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| Affiliation: | (College of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | 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. |
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| Keywords: | disconnector thermo-electric coupling analysis finite element method thermal stability |
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