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Government Of Assam Power Assam Power Project Development Company Ltd

Q&A on Hydropower Projects

  • What is the classification of Hydro Project based on installed capacity?
    • Micro: upto 100 KW
    • Mini: 101KW to 2 MW
    • Small: 2 MW to 25 MW
    • Mega: installed capacity >= 500 MW

    How energy is generated in Hydro Power Plant?

    The first step in the generation of energy in a hydropower plant is the collection of run-off of seasonal rain and snow in lakes, streams and rivers, during the hydrological cycle. The run-off flows to dams downstream. The water falls through a dam, into the hydropower plant and turns a large wheel called a turbine. The turbine converts the energy of falling water into mechanical energy to drive the generator After this process has taken place electricity is transferred to the communities through transmission lines and the water is released back into the lakes, streams or rivers. This is entirely not harmful, because no pollutants are added to the water while it flows through the hydropower plant.

    Why Hydro Power is called renewable source of energy?

    Hydropower is called renewable source of energy because it uses and not consumes the water for generation of electricity, and the hydropower leaves this vital resource available for other uses.

    What are the different types of Hydro Schemes?

    Different types of Hydro Schemes are:

    • Purely Run - of - River Power Station.
    • Storage type Power Station.
    • Run – of – River Stations with Pondage.

    What are the benefits of Hydro Power Projects?

    Hydropower is a renewable, economic, non polluting and environmentally benign source of energy. It saves scarce fossil fuel resources of the country, which are non renewable. Hydropower projects have certain distinctive advantages over other sources of electricity generation, as discussed below:

    Technical Benefits: Hydropower projects are known to have much longer life and provide cheaper electricity as there is no fuel cost and the recurring cost involved in generation, operation and maintenance is lower than that in case of other sources of energy.

    Environmental Benefits:

    • Uses renewable and pollution free source i.e water
    • Increase in Agriculture Productivity through development of irrigation and multipurpose schemes, having generation of electricity as one of the objectives, wherever possible and feasible.
    • Avoided Green House Gas (GHG) emissions from equivalent thermal and other fuel based power projects.
    • Involve large scale afforestation activities under various schemes like Compensatory Afforestation, Catchment Area Treatment, Green Belt Development, Voluntary Afforestation etc. which ultimately improve the environmental quality of the project area.
    • Flood Mitigation through large storage dams.
    • Source of Drinking Water