Analysis of Pumped Hydroelectric Storage for a Wind/pv System for Grid Integration

This paper deals with the pumping storage system analysis. The water reservoir serves for daily and seasonal energy storage, thus basically solving the problem of energy storage, which is the biggest problem of wider use of renewable energy sources. The electrical energy produced in excess by the renewable energy system is converted in potential energy by pumping water to a higher elevation where it can be stored indefinitely and then released to pass through hydraulic turbines and generate electricity. The estimation of the stored energy, the nominal electrical power of the hydroelectric plant and the evaporation rate of the water reservoir is presented.