摘要
复线电气化铁路时有列车火灾发生,若采用V形作业应急抢修,火灾救援人员利用消防水枪灭火时,水柱可能触及接触网导线,即使列车所在线路已经停电,但相邻线路接触网在停电线路导线上会产生感应电压,危及火灾救援人员的安全。针对列车火灾救援应急作业场景,首先对感应电压耦合原理及影响因素进行理论分析,建立火灾救援人员人体分压模型,推导得到人体安全电压限值下的水柱长度计算公式。选取典型线路对不同因素影响下复线直接供电方式、普速AT供电方式、高速全并联AT供电方式的接触网感应电压水平进行现场测试,利用各种工况下的感应电压最大值,计算不同消防水枪喷口当量直径下的水柱最小安全长度,进而提出相应的安全防护措施,并通过现场测试,验证防护措施的正确性。
In using the V-shaped operation for the fire rescue efforts on double-track electrified railways, the water sprayed may reach the OCS. Though the power of the line concerned has been cut off, the adjacent OCS may generate induced voltage, endangering the safety of fire rescue workers. In line with the operation scenario, the paper conducts theoretical analysis on the coupling principle of induced voltage and the factors concerned, after which the voltage division model of fire rescue workers is established. The paper concludes the formula that describes the relations between the length of water sprayed and the safe voltage limit for human.Case studies are carried out on typical lines for the field measurement of the OCS induced voltage under direct feeding of double-track railway, AT power supply of conventional railway and fully parallel AT power supply of high speed railway. With the highest induced voltage under various working conditions and the diameters of different fire gun nozzles, the length of water sprayed are calculated and the corresponding safety measures are proposed which are then verified in field tests.
作者
李正康
周文婕
沈睿
顾涛
高仕斌
韩正庆
LI Zhengkang;ZHOU Wenjie;SHEN Rui;GU Tao;GAO Shibin;HAN Zhengqing(Electrification Design and Research Institute,China Railway Eryuan Engineering Group Co Ltd,Chengdu Sichuan 610031,China;Workshop 3C,The People's Liberation Army of China No.5701 Factory,Chengdu Sichuan 610031,China;School of Electrical Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;Industrial and Electrical Testing Institute,China Railway Shanghai Group Co Ltd,Shanghai 200071,China)
出处
《中国铁路》
2022年第2期156-163,共8页
China Railway
基金
中国铁路上海局集团公司科技研究开发计划项目(2019056)。
关键词
复线电气化铁路
列车火灾救援
感应电压
人体分压模型
现场实测
安全防护
double-track electrified railway
fire rescue efforts of trains
induced voltage
human voltage division model
field measurement
safety measures
