Study on variations in moisture-affected fault characteristics of EMU lightning arrester

LIU Jian; LIN Dajie; GUO Yingqiang; ZHANG Shiyu; WANG Wenjun; WANG Shenghui

doi:10.13890/j.issn.1000-128X.2023.01.017

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Study on variations in moisture-affected fault characteristics of EMU lightning arrester

Electric Traction and Control | 更新时间：2024-08-02

- Study on variations in moisture-affected fault characteristics of EMU lightning arrester
- Electric Drive for Locomotives Issue 1, Pages: 131-137(2023)
- 作者机构：
  
  1.中车长春轨道客车股份有限公司，吉林长春 130062
  2.华北电力大学新能源电力系统国家重点实验室，北京;102206
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2023.01.017
  CLC： U266.2
- Published：10 January 2023，
  
  Received：05 March 2022，
  
  Revised：22 November 2022，
- 稿件说明：
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刘健, 林大杰, 郭英强, 等. 动车组避雷器受潮故障特征量的变化特性研究[J]. 机车电传动,2023(1):131-137.

LIU Jian, LIN Dajie, GUO Yingqiang, et al. Study on variations in moisture-affected fault characteristics of EMU lightning arrester[J]. Electric Drive for Locomotives,2023(01):131-137.
刘健, 林大杰, 郭英强, 等. 动车组避雷器受潮故障特征量的变化特性研究[J]. 机车电传动,2023(1):131-137. DOI： 10.13890/j.issn.1000-128X.2023.01.017.

LIU Jian, LIN Dajie, GUO Yingqiang, et al. Study on variations in moisture-affected fault characteristics of EMU lightning arrester[J]. Electric Drive for Locomotives,2023(01):131-137. DOI： 10.13890/j.issn.1000-128X.2023.01.017.

摘要

为研究动车组避雷器在受潮情况下的故障特征量变化，搭建了避雷器人工受潮试验平台，控制避雷器分别达到轻度受潮、中度受潮和重度受潮3种状态。试验研究了不同受潮情况下避雷器的直流伏安特性、直流参考电压、0.75倍直流参考电压下的泄漏电流、交流电压下的泄漏电流等特征；同时设计水煮试验开展了相关测试，并与人工受潮试验结果进行了对比和验证分析。人工受潮试验结果表明，避雷器在受潮后的伏安特性曲线发生了明显的变化，泄漏电流由阀片本体的泄漏电流和筒壁泄漏电流组成，并且随着电压升高，环氧筒筒壁电流将占主导分量；避雷器直流参考电压

1mA

在重度受潮时下降了6.8%，已经低于规程要求的5.0%；其0.75倍

1mA

下的泄漏电流在轻度受潮时较正常状态增加了6倍，结合水煮试验可知，在受潮避雷器恢复干燥后，0.75倍

1mA

下的泄漏电流也恢复到了正常值，即该故障特征量仅在避雷器受潮时反映灵敏；避雷器阻性电流在正常情况下占全电流的10%~20%，受潮后阻性电流占比达到了正常状态下的4倍，即阻性电流对受潮故障反映更加灵敏。

Abstract

In order to study the changes in the fault characteristics of the EMU lightning arresters exposed to moisture

an artificial moisture test platform of lightning arresters was built

on which the lightning arrester can be controlled to reach three states of light

mild and severe moisture respectively. The test was performed to study the characteristics of lightning arresters under different moisture conditions

including DC volt-ampere characteristics

DC reference voltage

leakage current under 0.75 times DC reference voltage and leakage current under AC voltage. Moreover

the water boiling test was carried out under the design conditions

and the results were compared with the artificial moisture test results for verification. According to the artificial moisture test results

the lightning arrester after moisture experienced significant changes in the volt-ampere characteristics curve; the leakage current contributed by the valve disc body and the cylinder wall was dominated by the epoxy cylinder with the increase in voltage; the DC reference voltage (

1mA

) decreased by 6.8% in severe moisture

lower than the specification requirements of 5.0%; the leakage current at 0.75 times

1mA

increased by 6 times in light moisture than that in the normal state. According to the water boiling test results

for the lightning arrester dried from the moisture state

the leakage current at 0.75 times

1mA

also returned to the normal values

that is

the fault characteristic is only sensitive when the lightning arrester is in the moisture state; the resistive current accounted for 10%-20% of the total current in the nor

mal conditions

and this proportion rose 4 times in the moisture state

that is

the resistive current is more sensitive to the moisture-affected fault.

关键词

动车组避雷器受潮伏安特性水煮试验

Keywords

EMUlightning arrestermoisturevolt-ampere characteristicboiling test

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