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                首页> 《新版彩神8app》期刊 >本期导读>动车组车顶避雷器绝△缘材料的性能衰退研究

                动车组车顶避雷器认知里绝缘材料的性能衰退研究

                67    2022-03-24

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                作者:张启哲1, 欧琦1, 毛帅涛1, 王胜辉1, 刘健2, 律方成1

                作者单位:1. 华北电力①大学,北京 102206;
                2. 中车长春轨道客车□ 股份有限公司,吉林 长春 130011


                关键词:动车组;避雷器;性能衰退;电场强度;界面受潮


                摘要:

                近年来动车组车顶卐避雷器故障频发,危害动车组安々全运行。为获得车顶避雷器的故障原因,对正常避◥雷器和性能衰退避雷器开展解体和气试验研究。通过直流参考电压测试和残压测试研究不⊙同状态阀片的电气性能变化。开展绝缘电阻测试、SEM和EDS测试,获得阀片及环氧筒绝缘材料的绝缘性能和微观特ㄨ征。最后,建立三维模型模拟⌒ 环氧筒缺陷对电场分布的影】响。结果表明,避雷器性能衰退的主没有要原因是环氧筒内壁存在缺陷,当避红色能量斧雷器受潮时,电场强度↓显著增加。改进〗环氧筒制造工艺并增强避雷器防潮性能,可以〗有效避免避雷器性能衰退。


                Study on performance degradation of insulating materials for roof arrester of EMU
                ZHANG Qizhe1, OU Qi1, MAO Shuaitao1, WANG Shenghui1, LIU Jian2, Lü Fangcheng1
                1. North China Electric Power University, Beijing 102206, China;
                2. CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130011, China
                Abstract: In recent years, the fault of roof arrester often occurs, which endangers the safe operation of EMU. In order to obtain the fault causes of the roof arrester, the disassembly test of normal arrester and performance degradation arrester is carried out. Through DC reference voltage test and residual voltage test, the electrical performance changes of varistors in different states are studied. Through insulation resistance test, SEM and EDS test, the insulation properties and micro characteristics of varistors and epoxy cylinder insulation materials were obtained. Finally, a three-dimensional model is established to simulate the effect of arrester defects on electric field distribution. The results show that the main reason for the deterioration of arrester performance is the defect on the inner wall of epoxy cylinder. When the arrester is damp, the electric field intensity increases significantly. Improving the manufacturing process of epoxy cylinder and enhancing the moisture-proof performance of arrester can effectively reduce the deterioration failure of arrester.
                Keywords: EMU;arrester;performance degradation;electric field;interface damp
                2022, 48(3):142-149  收稿日期: 2021-12-05;收到修改稿日期: 2022-01-19
                基金项目:
                作者简介: 张启哲(1995-),男,山西晋城市人,博士研究生,主要⌒ 从事动车组避雷器故障机理研究
                参考文献
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