Reliability evaluation of power system integrated with wind farms based on control variable sampling

Monte-Carlo sampling method in reliability evaluation has defects of great sampling number and low efficiency. This paper proposed control variable method in power system integrated with wind power unit, considering its feather of small unit capacity and large unit number. The proposed method is carried out on the IEEE RTS79 test system, compares with the conventional Monte-Carlo method and the average and scattered sampling method, the factors affect sampling efficiency are analyzed. The simulation results show that the proposed method can greatly reduce the sampling times and improve sampling efficiency, besides, demonstrates the correctness and effectiveness of the proposed method.