Head on Generation System
Indian Railways has adopted an energy-efficient power supply system for coaches called Head On Generation (HOG) system wherein power supply is drawn from Over Head Equipment (OHE) through converters provided in electric locomotive (WAP-7/WAP-5) for coach AC, lighting, fans etc. The power generator cars which used to make huge noise and emit fumes will no longer exist.
With the new HOG technology, the power supply which is tapped from overhead to the train engine is being distributed to the trailing coaches for meeting power requirements.
Indian Railways Utility
In a revolutionary project, the Indian Railways are now saving huge expenses on energy. The Delhi division of the Northern Railways (NR) zone has cut down 80% on its energy bills with the efficient implementation of HOG in 39 pairs of Premium and Express trains. The eco-friendly HOG mechanism has been introduced in 11 pairs of Shatabdi Express, 8 pairs of Rajdhani Express, 2 Duranto trains, 2 trains of Humsafar Express and 16 pairs of Express trains which are currently functioning under the Delhi Division network.
Combating Climate Change
In an effort to cut down on expenditure and a conscious move towards combating climate change, the HOG technology has been implemented. The power supply which was tapped from the overhead power lines through the pantograph to the train engine is now being utilised to operate the engine and haul the coaches of the train.
The HOG system in Indian Railways has been implemented in all the trains which have LHB (Linke Hofmann Busch) coaches and are hauled by electric traction. LHB coaches are the passenger coaches of Indian Railways that have been developed by Linke Hofmann Busch of Germany and mostly produced by Rail Coach Factory in Kapurthala, India. The coaches are designed for an operating speed up to 160 km/h and could go up to 200 km/h. They are considered to be anti-telescopic, which means they do not get turned over or flip in case of a head-on collision. These coaches are made of stainless steel and the interiors are made of aluminium, which make them lighter compared to conventional trains.
This environmentally-friendly technology caters to the power needs such as coach lighting, air conditioning in trains. This is an alternate measure of the earlier used End on Generation (EOG) technology in which two power cars were installed in trains.
SC Jain, Divisional Railway Manager, Delhi was quoted in a press release saying that the HOG system does not require the diesel oil consumption. The technology will also reduce air pollution, noise pollution and will provide uninterrupted illumination in the coaches of the train. This is expected to save around Rs 65 crore per annum on the basis of diesel consumption of the generator cars with the introduction of the HOG technology.