摘要
27.5 kV电缆是高速铁路牵引供电系统的重要基础设施,其运行状况直接关系到高速铁路运输安全和运营品质。首先分析了护层保护器的工作原理,研究了三相电力电缆和电气化铁路用单相27.5 kV电缆的差异,总结了目前电气化铁路27.5 kV电缆用护层保护器现状及存在的问题;其次总结了27.5 kV电缆的接地方式,然后分别针对不同导线截面、不同外护套绝缘材料、不同屏蔽铜丝数量的27.5 kV电缆,对护层保护器接地线、额定电压、起始动作电压、持续运行电压、标称放电电流、标称放电电流下的残压、工频耐受电压、耐受大电流冲击电压、通流容量、电缆护层最低冲击电压、残压、动作次数寿命等参数进行了详细的研究,并提出了护层保护器参数的建议,对于电气化铁路护层保护器标准指定以及选型具有一定参考意义。
The 27.5 kV cable is an important infrastructure for the traction power supply system of high-speed railway,and its operation is directly related to the safety and operation quality of high-speed railway transportation.Firstly,the working principle of the cladding protector is analyzed,the differences between the three-phase power cable and the single-phase 27.5 kV cable for electrified railway is analyzed,and the current status and existing problems of the current sheath protector for electrified railway 27.5 kV cable are summarized.Secondly,the grounding method of 27.5 kV cable is summarized,and then for the 27.5 kV cable with different conductor sections,different outer sheath insulation materials,and different number of shielded copper wires,the grounding wire,rated voltage,starting operating voltage,continuous operation voltage,nominal discharge current,residual voltage under nominal discharge current,power frequency withstand voltage,withstand high current surge voltage,current capacity,cable sheath minimum impact voltage,residual voltage,action number life and other parameters are studied in detail.And the parameters of the cladding protector are proposed,which has certain reference significance for the standard designation and selection of electrified railway cladding protector.
作者
何常红
韩凌青
方怡
王生龙
郭琦沛
李少鹏
HE Changhong;HAN Lingqing;FANG Yi;WANG Shenglong;GUO Qipei;LI Shaopeng(China Railway Design Group Co.,Ltd.,Tianjin 300308;Electrification Survey Design&Research Institute of China Railway Liuyuan Group Co.,Ltd.,Tianjin 300250;China Railway Electrification Bureau Group,Beijing 100070)
出处
《电气工程学报》
CSCD
2023年第3期99-108,共10页
Journal of Electrical Engineering
基金
中国铁路设计集团科技开发课题《中国标准接触网体系研究》资助项目(2023A0251214)。
关键词
高速铁路
27.5
kV电缆
护层保护器
High speed railway
27.5 kV single core cable
protective layer protector
作者简介
何常红,男,1984年生,硕士,高级工程师。主要研究方向为铁道电气化。E-mail:hechanghong@CRDC.com。
