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The power plants to be employed as base power plants should have
1-low operating cost.
2 - capability of working continuously for the long periods.
3- requirement of few operating personnel and their repair should be economical and speedy.
The power plants to be employed as peak power plants should have the capability of quick start, synchronisation and taking up of system load and quick response to load variations.
As hydroelectric power plants meet the requirements of both base load and peak load plants, the hydropower plants are well suited for both base load and peak load operations. The hydropower plants should be employed for base load operation as far as possible because of their higher capital cost. However, during the periods of draught, the hydropower plants may be used as peak load plants.