New trains in phase 3 to regenerate more power | delhi | Hindustan Times
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New trains in phase 3 to regenerate more power

delhi Updated: Jan 13, 2012 01:15 IST
Subhendu Ray
Subhendu Ray
Hindustan Times
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Did you know that the Metro system needs only 2-3 % of Delhi’s total requirement of power — which is 3,500-4,500 MW per day?

And if Metro officials are to be believed, despite the 120km expansion in phase 3, their power requirement will not go up by much. The reason: The new Metro trains that will be added to the fleet will be able to regenerate more power.

“Metro trains need 15% extra energy to attain high speed. But now, trains will achieve higher speed despite using up almost the same amount of power,” explained HS Anand, director (Rolling Stock).

At least 60-65 % of power will be regenerated through the introduction of advanced regenerative braking technology, Anand added. Presently Metro trains regenerate 25-30% of power. “The new trains’ low dependence on friction brakes will help in regenerating and saving energy,” he said.

Under this system, whenever a train would apply brakes, the released kinetic energy will be converted into electrical energy. The kinetic energy would kickstart a converter-inverter, which would act as an electricity generator and supply electrical energy back to the over head electricity lines that supply power to run trains.

At present, Delhi Metro consumes an average of 1.5 million units every day. The total number of cars at present is 1,022. This number will rise to 1,234 cars in phase 2. In Phase-3, 778 cars will be added to the fleet.