KR TECHNOLOGY - Electrification & Power Facility

KR TECHNOLOGY Electrification & Power Facility

Electrification & Power Facility

Transmission line

It refers to extra-high voltage(154kV) electric line constructed for transmitting the power from KEPCO substation to railway substation and two-lines are installed overhead or underground

Substation facility

Substation converts extra-high voltage(154kV) received from transmission line to alternating voltage(55kV) suitable for electric railway and supplies a catenary with the power or disconnects it from the catenary
Main facilities
- Substation(S/S) : It transforms voltage from extra-high(154kV) to 55kV in order to supply a catenary with the power
- Sectioning Post(SP) : It is constructed between substations to connect or disconnect the power for both sides
- Parallel feeding post(PP) : It is constructed with AT(auto transformer) at intervals of 8~10km to reduce inductive communication disturbance from AC traction line and compensate the voltage drop

Power supply schematic

Catenary system

It is a electric line which is in contacts with the pentagraph of electric rolling stock and supplies electric power to the electric rolling stock
Dynamic character of catenary and pentagraph is critical factor determining the speed of the electric rolling stock, so we have the technical know-how of catenary system at each level of speed
main parts of catenary system

Performance comparison of each speed

철도 전차선로 전경 관련 표
division		300km/h	350km/h	400km/h
contact wire		Cu 150㎟	CuSn 150㎟	CuMg 150㎟
messenger wire		CuMg 65㎟	CuMg 116㎟	CuMg 116㎟
tensioning device	contact wire	20,000N	26,000N	34,000N
tensioning device	messenger wire	14,000N	20,000N	23,000N

Power distribution system

It is the facilities that supply the power to railway station, tunnel facilities, signaling system and communication system etc. which include electric line, switchgears and its attached devices

SCADA(Supervisory Control And Data Acquisition) system

This system is installed on the rail traffic control center in Guro, Seoul, to monitor and control the electrification & power systems remotely by collecting and analyzing the real-time operational information of the electric facilities on catenary and substation all over the country

Overview