标准雷电压下的动车组高压箱电场仿真计算
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摘要
建立了动车组车顶高压电器箱及其内部主要电气设备的三维有限元模型,考察了在标准雷电冲击电压下,高压箱内的整体电场分布随时间的变化规律。分析了箱内套管、支撑绝缘子表面和金属电极表面的电位及电场分布。结果表明,现有高压电器箱的设计结构存在不合理之处。箱内电极如断路器刀片、隔离开关表面电场集中,互感器金具表面电场强度越限,设备承受过电压时易发生电晕放电。对各电极表面电场畸变的原因进行分析,分别给出了改变电极形状、包裹绝缘护套等优化电场分布的合理建议。
Finite element 3 D model of high voltage box and its internal equipment are established. The variation of the overall electric field distribution in the high voltage box with time under the standard lightning impulse voltage is investigated. The potential and electric field distribution of the bushing,the supporting insulator surface and the metal electrode surface were analyzed. Simulation result shows that existing improper design of box will make electric field concentrate on the blade,switch and fitting and may result in corona discharge. The causes of the electric field distortion on the surface of each electrode are analyzed,and reasonable suggestions for changing the shape of the electrode,wrapping the insulating sheath and so on are given.
Finite element 3 D model of high voltage box and its internal equipment are established. The variation of the overall electric field distribution in the high voltage box with time under the standard lightning impulse voltage is investigated. The potential and electric field distribution of the bushing,the supporting insulator surface and the metal electrode surface were analyzed. Simulation result shows that existing improper design of box will make electric field concentrate on the blade,switch and fitting and may result in corona discharge. The causes of the electric field distortion on the surface of each electrode are analyzed,and reasonable suggestions for changing the shape of the electrode,wrapping the insulating sheath and so on are given.
引文
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[13]吴广宁,杨坤松,高国强,等.电动车组车顶复合绝缘子内部间隙电场分析[J].高电压技术,2014,40(10):3252-3259.WU Guangning,YANG Kunsong,GAO Guoqiang,et al.Analysis of the electric field through internal gap of electric multiple unit roof composite insulator[J]. High Voltage Engineering,2014,40(10):3252-3259.
[14]成本权,康明明,郑维飞.防污闪绝缘护套对支撑绝缘子电场分布的影响分析[J].电力机车与城轨车辆,2016(3):21-24.CHENG Benquan,KANG Mingming,ZHENG Weifei.Analysis of anti-flashing insulation sheath effect onelectric field distribution of insulator[J]. Electric Locomotives&Mass Transit Vehicles,2016(3):21-24.
[2]杨帅.髙速动车组车体过电压及车体电磁场分布特性研究[D].成都:西南交通大学,2012.
[3]汪祥,胡志坚.基于Ansoft的雨滴分布对绝缘子表面电场影响研究[J].电瓷避雷器,2015(5):30-36.WANG Xiang,HU Zhijian. Study on the influence of raindrop distribution on insulator surface electric field based on ansoft[J]. Insulators and Surge Arresters,2015(5):30-36.
[4]律方成,马建桥,刘宏宇,等.基于有限元的高压设备箱绝缘优化研究[J].系统仿真学报,2015,6(11):2858-2864.LV Fangcheng,MA Jianqiao,LIU Hongyu,et al. Insulation optimization of high voltage box based on finite element method[J]. Journal of System Simulation,2015,6(11):2858-2864.
[5]邓志祥,彭宗仁,尹桂来.高速列车车顶高压设备电场仿真计算及金具结构优化[J].高压电器,2016(11):149-156.DENG Zhixiang,PENG Zongren,YIN Guilai. Simulation of electrical field of high-speed train high-voltage roof equipment and Structure optimization of fittings[J].High Voltage Apparatus,2016(11):149-156.
[6]赵晓明.动车组高压系统对地闪络放电分析及应对措施探讨[C]第三届铁路安全风险管理及技术装备研讨会论文集.成都:[s. n.],2012:331-335.
[7]杨坤松.动车组车顶绝缘子湿污和内部缺陷条件下电场分布研究[D].成都:西南交通大学,2014.
[8]杨熙,王青于,廖晋陶,等.标准雷电压下750kV复合横担暂态电场计算[J].高电压技术,2017,291(2):645-653.YANG Xi,WANG Qingyu,LIAO Jintao,et al. Computation of the transient electric field distribution for 750 k V composite cross-arms under standard lightning impulse voltage[J]. High Voltage Engineering,2017,291(2):645-653.
[9]郑殿春.绝缘结构电场分析有限元法与应用[M].北京:科学出版社,2012.
[10]严璋,朱德恒.高电压绝缘技术[M].北京:中国电力出版社,2002.
[11]律方成,马建桥,刘宏宇,等.动车组高压隔离开关电极结构优化[J].高电压技术,2015,6(11):3546-3553.LV Fangcheng,MA Jianqiao,LIU Hongyu,et al. Optimization of high-voltage isolating Switch electrode of China railway high-speed[J]. High Voltage Engineering,2015,6(11):3546-3553.
[12]黄成才,李永刚.基于复合绝缘子污闪模型的闪络特性分析[J].电瓷避雷器,2014(4):31-36.HUANG Chengcai,LI Yonggang.外文标题缺失[J].Insulators and Surge Arresters,2014(4):31-36.
[13]吴广宁,杨坤松,高国强,等.电动车组车顶复合绝缘子内部间隙电场分析[J].高电压技术,2014,40(10):3252-3259.WU Guangning,YANG Kunsong,GAO Guoqiang,et al.Analysis of the electric field through internal gap of electric multiple unit roof composite insulator[J]. High Voltage Engineering,2014,40(10):3252-3259.
[14]成本权,康明明,郑维飞.防污闪绝缘护套对支撑绝缘子电场分布的影响分析[J].电力机车与城轨车辆,2016(3):21-24.CHENG Benquan,KANG Mingming,ZHENG Weifei.Analysis of anti-flashing insulation sheath effect onelectric field distribution of insulator[J]. Electric Locomotives&Mass Transit Vehicles,2016(3):21-24.