Pumped Storage System for Randenigala Hydropower Plant
The main focus of this work was to introduce a pumped storage system to an existing hydro power plant located in Sri Lanka. The power plant selected is located in an area where farming is done extensively. Therefore electrical power generation and release of water to the downstream is to be properly coordinated with relevant authorities. The solution for this situation can introduce a wind powered pumped power plant to the Mahaweli scheme for the purpose of keep peak power saving for around half an hour. A feasibility study was carried out to utilize wind energy and excess power to drive the motors of the pumped storage system.
There versions with different numbers of motors and wind turbines have been considered to meet the half hour peak demand of the system. The optimum number of turbines and motor capacities and their number have been selected brand on both energy and water management system.
Finally the selected version has been compared with the function of pumped storage system using access power from the national electricity grid. The annual saving with the use of selected version has Rs. 55million per year to Ceylon Electricity Board of if uses design option – 2 than design option – 1.