Pumped Storage Power Plants are a type of hydroelectric power generation system that stores energy by moving water between two reservoirs at different elevations. During periods of low electricity demand, excess energy is used to pump water from the lower reservoir to the upper one. This process effectively stores energy in the form of gravitational potential energy. When electricity demand increases, the stored water is released back down to the lower reservoir, passing through turbines that generate electricity. This method allows for quick adjustments to energy supply, making pumped storage a valuable tool for balancing the grid and integrating renewable energy sources like solar and wind.