EES를 이용한 제주지역 풍력발전단지의 출력 평활화 효과 분석

Abstract

The fluctuation of the output power generated from wind farms connected to Jeju power grid will be able to make effects at the power quality and stability. To solve the matter, many researchers have proposed the usage of the EES(Electric Energy Storage) in the wind farm. In this paper, The EES is applied to each wind farms for mitigating the fluctuation of the output power generated from wind farms. The EES is controlled for smoothing the output power of wind farms. To verify the effectiveness of the proposed method, two kinds of simulation will be carried out: 1) The simulation results by using PSCAD/EMTDC simulation program are compared to the measured data from the real power grid in Jeju Island. 2) The second simulation is to analyze the output power generated from wind farms when the EES is connected to the grid. Without the EES, the fluctuation rate per minute of the output power generated from wind farms is about 14.4%. It is larger than the fluctuation rate of 10% which has been noticed by Grid Standard of renewable generator. In case of applying the EES, the fluctuation rate of the output power generated from wind farms is reduced to 12.7% which has about 1.7% improvement. However, it also does not meet the Grid Standard of renewable generator. Finally, to satisfy the Grid Standard of renewable generator, it is effective to estimate the capacity of the EES which applies larger than 10% capacity of wind forms