Sizing of Wind Turbine for Repowering of Old Wind Farm: A Case Study Based Approach

Large scale deployment of the Wind Power since early 1990's in India has hardly left any potential virgin windy land sites for the generation of power from wind energy. The sites wind high CUF are installed with the low rated power capacity wind turbines like 225 kW, 500 kW. The rapid increase in the technology in this sector has now forced to change these potential sites with the turbines having high capacity. The paper presents the overview of the wind power installation in India and the statistics of number of turbines in Maharashtra State. Also, it states the benefits of repowering in one the site in the state, by selecting the optimum size of turbine. In the repowering of wind farms the selection of appropriate size of the turbines is an important aspect to maximize the capacity utilization factor from the site. This paper explains the process of selecting the proper turbine size for repowering with the help of a flowchart and the mathematical modeling with the wind resource parameters.