Performance Evaluation of Thailand’s 8 MW Wind Farm Feeder Trip, Energy Generation, and Loss Using 5 MWh BESS- A Statistical and Economic Approach

In this study, an operational 8 MW wind farm was analyzed through a statistical approach to determine the wind speed and feeder trip correlation with energy loss and energy production. In December, a higher wind potential was recorded; however, a higher feeder trip was recorded during the low wind potential period of October, with a maximum duration of 1800 min. The box plot and histogram show that a higher feeder trip occurred at a wind speed of 4-6 m/s, indicating that grid voltage and load consumption were the major causes of the feeder trip. The Pearson Correlation method expressed a similar trend for feeder trips associated with energy losses that had a strong positive correlation compared to feeder trip time. To improve the stability of the wind farm's power generation, a 1-5 MWh battery energy storage system was studied to determine its impact on the grid voltage at the wind farm and the load terminals. It was found that 411071.84 kWh is enhanced for a 5 MWh battery energy storage system compared to the conventional wind farm. This enhancement in power production shows a positive correlation of grid voltage at the factory, village 1, wind farm, village 2, and village 3 with a range of 0.703, 0.873, 0.665, 0.894, and 0.896, respectively. Further, the economic analysis of the 5 MWh battery incorporation increased the annual revenue to 2825585 baht with a payback period of 7.79 years and a return on investment of 0.10 years.