Fault Detection and Protection System of Electric Railway Substation  

作　　者：Dae-Seok Kang Woo-Sik Won Byung-Lib Ahn Byeong-Gon Lee 

机构地区：[1]Entechworld,Inc.,196 Gasan Digital 1-ro,Geumcheon-gu,Seoul 08502,Korea [2]Korea Railroad Corporation,240 Jungangno,Dong-gu,Daejeon 34618,Korea

出　　处：《Journal of Energy and Power Engineering》2022年第4期147-155,共9页能源与动力工程（美国大卫英文）

基　　金：This study was conducted by the Ministry of Land,Infrastructure and Transport’s Research Project on Railway Technology-Projects(21RTRP-B146037-04).

摘　　要：The industrial power systems are moving to digital networks,and unmanned systems are increasing recently with the technological development of information and communication technology.In particular,reliability of system operation is very important for stable power supply.Most industrial power distribution facilities use a 154 kV or 22.9 kV extra HV(high voltage)power system,and a special monitoring system is required because a large loss occurs when an error occurs in the power facility in the field.Although digital protection relay(IED;intelligent electronic device)and FR(fault recorder)are applied to the field to protect the power system,various improvement activities are still ongoing.In this paper,a 22.9 kV high-voltage panel and its test bed,which are widely used in railway stations,tunnels,substations and large plants,were tested as test subjects.The developed fault detection system automatically starts the AL(auto-lock)circuit or outputs an alarm signal to user by monitoring in real time problems such as CT(current transformer)-open and poor-contact that the existing digital protection relay cannot cover.In addition,it is intended to increase the safety and reliability of the power system by blocking various accidents in the system in advance and accurately analyzing the causes of faults with the developed fault detection system.

关 键 词：CT open poor contact fault detection protection relay SUBSTATION HV panel 

分 类 号：TN9[电子电信—信息与通信工程]