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Electric traction (Part 2)
- The document discusses electric traction systems used to power trains, trams, and trolleybuses. It describes the key components including trolley wires or catenaries to transmit electricity, current collectors like trolley poles or pantographs to draw power from the lines, and traction substations that convert electric power for rail use. It also mentions negative boosters which are transformers that reduce electromagnetic interference from the traction system on nearby communication lines.
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Electric traction (Part 2)
- 1. ELECTRIC TRACTION -Mr. V.S. Wadkar
- 2. Electric Traction System •Trolley Wire • Catenaries • Current Collectors • Feeding & Distribution Systems • Traction Substation • Negative Booster
- 3. Electric Traction System •Trolley wire refers to Overhead line, used to transmit electricity to trains, trams and trolleybuses. • A catenary is a system of overhead wires used to supply electricity to a locomotive, tram (streetcar), or light rail vehicle that is equipped with a pantograph.
- 4. Catenary (upper photo)is suited to higher-speed rail vehicles. Trolley wire (lower photo) is suited to slower-speed trams (streetcars) and light rail vehicles.
- 5. Electric Traction System •Three types of current collectors are in common use. 1. Trolley Collector 2. Bow Collector 3. Pantograph Collector
- 6.
- 7. Electric Traction System •A traction substation, traction current converter plant or traction power substation substation (TPSS) is an electrical substation that converts electric power from the form provided by the electrical power industry for public utility service to an appropriate voltage, current type and frequency to supply railways, trams (streetcars) or trolleybuses with traction current.
- 8. Electric Traction System Followingpoints are considered while selecting the site for TSS • Capaicty of transformer and voltage regulation Voltage Level • It should be approachable by road and preferably near a Railway station for better connectivity by Road as well rail • Location should be free from water flooding • To avoid land acquisition • There is a need to convert FP with neutral section. Such planning can be decided in advance.
- 9. Electric Traction System •Negative Booster The electromagnetic field from a single- phase alternating current flowing through the s ystem’s wires has an effect on aerial and cable communication lines, on metal pipelines, and o n other service or communication lines located near electrified railroads. Negative booster tran sformers are designed to reduce this effect.