作者：梁爽¹, 王晓明¹, 张启哲², 王胜辉², 董兴浩², 律方成²

作者单位：1. 中车青岛四方机车车辆股份有限公司，山东 青岛 266111;
2. 华北电力大学，北京 102206

关键词：动车组;车载避雷器;里程;参考电压;泄漏电流

摘要：

为研究运行里程对车载避雷器性能的影响，选取运行480万公里、240万公里避雷器各4只和新品避雷器1只开展试验研究。使用数字兆欧表测量避雷器绝缘电阻。通过持续加压，获得避雷器在不同温度下的直流参考电压。在特定环境温度测量避雷器直流参考电压、0.75倍直流参考电压下泄漏电流和工频参考电压。研究结果表明，各避雷器绝缘电阻均大于22 GΩ。加压时间会影响参考电压测试结果，需要规范避雷器例行试验加压流程。环境温度对避雷器参考电压测试结果具有重要影响，需要对出厂试验环境温度提出更精确要求。运行里程对避雷器直流参考电压、0.75倍直流参考电压下泄漏电流和工频参考电压等性能影响很小。运行至480万公里的车载避雷器仍具有良好电气性能，能够可靠运行。

Research on performance of on-board arrester for EMU with different operating mileage
LIANG Shuang¹, WANG Xiaoming¹, ZHANG Qizhe², WANG Shenghui², DONG Xinghao², Lü Fangcheng²
1. CRRC Qingdao Sifang Locomotive and Rolling Stock Co., Ltd., Qingdao 266111, China;
2. North China Electric Power University, Beijing 102206, China
Abstract: In order to study the influence of operating mileage on the performance of on-board arresters, four arresters in service for 4.8 million kilometers, four arresters in service for 2.4 million kilometers and one new arrester were selected for experimental research. Use digital megohmmeter to measure the insulation resistance of arresters. The DC reference voltage of the arrester at different temperatures were obtained by continuously applying voltage. The DC reference voltage of arrester, leakage current under 0.75 times of DC reference voltage and AC reference voltage were measured at specific temperature. The results show that the insulation resistance of each arrester is greater than 22 GΩ. The time to apply voltage will affect the test results of reference voltage, so it is necessary to standardize the routine test process of arrester. The ambient temperature has an important influence on the test results of arrester reference voltage, so it is necessary to raise more accurate requirements for the ambient temperature of factory test. The operating mileage has little influence on the performance of arrester such as DC reference voltage, leakage current under 0.75 times of DC reference voltage and AC reference voltage. The on-board arrester in service for 4.8 million kilometers still has good electrical performance and can operate reliably.
Keywords: EMU;on-board arrester;mileage;reference voltage;leakage current
2022, 48(4):141-145  收稿日期: 2020-12-27;收到修改稿日期: 2021-03-09
基金项目: 中国中车股份有限公司科技研究开发计划重大项目（2018CDA005-3）
作者简介: 梁爽（1978-），女，河北廊坊市人，高级工程师，硕士，从事动车组、城际车电气制动系统设计工作
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