Power Generation/Hydro Power - Wikiversity Power Generation/Hydro Power. During off-Peak hours, the plant draws electric energy from the electrical grid & uses that to pump water to the upper reservoir. When Peak time comes, the water from the upper reservoir is released & electric energy is generated in the lower reservoir. This cycle is repeated daily. By their nature,.. Related searches for hydro power plant with block diagram hydro power plantsmall hydro power planthydro power plant pdfhydro power plants in ushydro power plants for salehydro power plant componentshydroelectric power plant diagrammini hydro power plant design