| 引用本文: | 刘家军,刘创,韩斌,杜智亮,苑正阳.一种铁路电气化区段电力电缆头的监测保护装置[J].电力系统保护与控制,2018,46(13):141-148.[点击复制] |
| LIU Jiajun,LIU Chuang,HAN Bin,DU Zhiliang,YUAN Zhengyang.A monitoring and protection device of power cable joints for the railway electrified section[J].Power System Protection and Control,2018,46(13):141-148[点击复制] |
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| 摘要: |
| 针对近年铁路电气化区段电缆头烧毁事故频发的情况，分析了引起铁路电气化区段电缆头烧毁的原因，设计了以 PTC热敏电阻为核心的电缆头过流保护装置和电缆头运行状态在线监测装置。PTC过流保护装置和护层过压保护器配合，防止电缆因护层中电流过大而急剧升温甚至烧毁或出现暂态过电压发生击穿。同时，多参数实时在线监测电缆头的运行状态，供工作人员及时准确判断电缆头状况，做到提前预警、调整电缆负荷和合理制定电缆头检修计划。该监测装置已在襄渝线挂网使用，运行效果良好。 |
| 关键词: 地回流 电缆头烧毁 PTC保护 监测装置 |
| DOI：10.7667/PSPC171399 |
| 投稿时间：2017-09-19修订日期：2017-11-01 |
| 基金项目:西安市科技计划项目(2017080CG/RC043 (XALG026)) |
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| A monitoring and protection device of power cable joints for the railway electrified section |
| LIU Jiajun,LIU Chuang,HAN Bin,DU Zhiliang,YUAN Zhengyang |
| (Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048, China;The Power-feed Section of Ankang, Xi'an Railway Administration, Ankang 725200, China) |
| Abstract: |
| This paper analyzes the cause of cable-joint burning in railway electrified section considering frequent fire accidents in this section in recent years, followed by the design of a cable-joint online monitoring device for the running state and an overcurrent protection device, with PTC thermistor as the core. PTC overcurrent protection device can cooperate with the sheath-overpressure protector to prevent cables from heating rapidly even burning out by excessive current and from a transient overvoltage breakdown. Meanwhile, the cable-joint online monitoring device can monitor the running state online in real-time based on multi-parameter, thus enabling the staff to accurately evaluate cable-joint condition, make timely warning, adjust the cable load, and rationally develop the cable head maintenance plan. The monitoring device has been applied in the Xiangyu-Line, and it works well. This work is supported by Science and Technology Program of Xi’an (No. 2017080CG/RC043 (XALG026)). |
| Key words: feedback current through ground cable-joint burned out PTC protection detection devices |
