How to connect the high-speed rail wires? How to connect the high-speed rail wires

The two wires above the high-speed rail are transmission lines erected along the railway line to supply power for electric locomotives. The current that the high-speed train depends on is transmitted through the catenary of the locomotive. The traction substation provides electric energy for the catenary, and the high-speed train brings the catenary electric energy back to the car to drive the variable frequency motor to make the train run. Once the catenary is cut off, or the pantograph of the train is in poor contact with the catenary, it will affect the power supply of the train.

From the circuit point of view, the high-speed rail adopts AT (Autotransformer) power supply mode. High-speed rail can run, relying on traction power supply system to provide power for high-speed trains, and traction power supply is the first-class load of power system.

Extended data:

The power supply modes of catenary include unilateral power supply, bilateral power supply and cross-regional power supply. Unilateral and bilateral power supply are normal power supply methods.

Unilateral power supply: the power supply arm only obtains current from the substation at one end.

Bilateral power supply: the power supply mode in which the power supply arm obtains current from two adjacent substations. Cross-regional power supply is an abnormal power supply mode (also called emergency power supply mode).

Pantograph-catenary system is a complex coupling system which integrates mechanical, electrical, material and other factors. Pantograph-catenary relationship is one of the three core relationships in the safe operation of high-speed electrified railway, and the good performance of pantograph-catenary system is the basic condition to ensure the reliable and safe operation of high-speed trains.