牵引变电所二次系统综合防雷电实践

Practice of Comprehensive Lightning Protection for Secondary System of Traction Substation

铁路牵引变电所二次系统的控制、保护、信号、通信、监控、交直流等装置大量采用电子元器件,易遭受雷电的危害及干扰,造成牵引变电所设备损坏。为此,采用接地、均压、限幅、设置应急跳闸电源技术,从传导、分流、屏蔽、接地、等电位连接、隔离、应急保护等方面采取措施,探讨综合防雷屏、隔离防雷屏、免维护应急电源,形成牵引变电所综合防雷优化技术。

The control,protection,signal,communication,monitoring,AC/DC and other devices of the secondary system of the railway traction substation use a large number of electronic components,which are vulnerable to lightning hazards and interference,causing damage to the traction substation equipment.To this end,grounding,voltage equalization,amplitude limiting,and emergency trip power supply technology were adopted,and measures were taken from conduction,shunting,shielding,grounding,equipotential bonding,isolation,emergency protection,etc.The comprehensive lightning protection screen,isolated lightning protection screen and maintenance free emergency power supply are discussed to form the comprehensive lightning protection optimization technology of traction substation.