某CRH3型高速铁路动车组电压互感器过热烧损 故障原因分析及解决措施
禹睿枫马明周月
Cause Analysis of Voltage Transformer Overheating Burnout Failure for CRH3 High-speed Railway EMU and Countermeasures
YU RuifengMA MingZHOU Yue
-
作者信息:1.中车长春轨道客车股份有限公司质量保证部， 130062， 长春
-
Affiliation:Quality Assurance Department, CRRC Changchun Railway Vehicle Co., Ltd., 130062, Changchun, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2023.04.023
-
中图分类号/CLCN:TM451∶U266.23
-
栏目/Col:应用技术
摘要:
根据接触网的供电设计及动车组的牵引系统结构，对我国高铁动车组的车顶电压互感器爆裂故障原因进行分析，得到主要故障原因为：目前使用的25 kV电压互感器未能满足我国高铁牵引接触网电源污染的设防要求。针对故障原因提出，将直流偏磁电压设防值从1 500 V提高到2 500 V，进而提高电压互感器抗直流偏磁的能力。采取的具体技术手段为：在电压互感器铁心磁路上切出部分气隙，使电压互感器一次绕组在发生直流偏磁时转变成铁心电抗器运行，把一次电流限制在安全运行水平。根据试验验证结果，改进后的电压互感器能满足2 500 V直流偏磁电压设防要求。
Abstracts:
Starting from the catenary power supply design and EMU (electric multiple unit) traction system structure, the causes of vehicle roof voltage transformer burnout failure of high-speed railway EMU in China are analyzed, and the 25 kV voltage transformer currently in service that fails to meet the fortification requirements for the high-speed railway traction catenary power pollution in China is detected as the main cause. Targeting this cause, it is proposed to increase the setting value of DC bias voltage from 1 500 V to 2 500 V, thus improving the voltage transformer ability to resist DC bias. The specific technical means is to cut part of the air gap on the core magnetic circuit of the voltage transformer, so that the primary winding of the voltage transformer can be converted into core reactor operation in case of DC bias, and the primary current can be limited to safe operation level. According to the test verification results, the improved voltage transformer can meet the protection requirements of 2 500 V DC bias voltage.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 数字时代新征程
过刊浏览
资料下载
友情链接