Railway electrification means that the substation is located close to the railway track. It sends current from the power plant through high voltage transmission lines or high voltage transmission cables to the contact network above the railway track or power supply track. next to the railway tracks. The mains or power rail is an electrical device that directly transmits electrical energy to an electric locomotive. The electric locomotive obtains the required electrical energy from the contact network or power rail via a pantograph or conductive wheel.
Electrified railways refer to railways that can run electric trains. They are named because corresponding electrification equipment is required along the lines of these railways to guarantee power supply to the trains. Electrified railways appearedwith the emergence of electric locomotives, because electric locomotives do not have their own power and require a continuous supply of electric energy from the electric power system along the railway track to drive the vehicles.
Since electric locomotives have greater transportation capacity advantages than diesel locomotives, the transportation capacity of electrified railways on the same scale far exceeds that of non-electrified railways , thus becoming the main type of modern railway.
Detailed information
Unlike traditional railways where steam locomotives or diesel locomotives operate traction trains, electrified railways refer to the power supply obtained from an external power supply and traction power. Electrical energy, used by locomotiveselectric to pull trains, circulates on railways.
It includes electric locomotives, maintenance facilities, traction electric power systems, various electrical devices and corresponding railway communication, signaling and other equipment.
Electrified railways have the advantages of large transportation capacity, fast moving speed, low energy consumption, low operating costs and good conditions of work. They are suitable for main railway lines with large transport volumes and mountain main railway lines. With steep slopes and long tunnels, electrification has clear advantages both technically and economically.
Aerial cables are connected to the power supply network of electrified railways and are divided into two categories: flexible and rrigid. Electric locomotives or EMUs are connected to the catenary via the rack pantograph and draw energy from it.
Overhead cables and overhead cables are the terms used in Hong Kong and Taiwan, and are often called catenary power supply in mainland China. In mainland China, overhead cables and overhead cables generally refer to high-voltage transmission lines.
Both types of wires end up forming loops through the normal grounding of the train track. There are also a few railways that use the fourth rail (such as the London Underground) as a current loop.
One of the advantages of overhead cables is that they can also be used as high-voltage transmission lines, such as the Keikyu line in Japan.
Baidu Encyclopedia-Railway Electrification