STATE-OF-CHARGE TARGET CONTROL FOR ENERGY STORAGE SYSTEM FOR IMBALANCE AND WIND CURTAILMENT REDUCTION IN ELECTRICITY MARKET

Abstract

When wind power companies trade their electricity at an electricity market, strategy to cope with forecast error is essential to maximize their profit. An energy storage system is one of solution, however, there are no enough discussion about state-of-charge target even it is important factor to minimize cost. The authors proposed a method to obtain ‘SOC target curve’. By numerical simulation, the SOC target curve’ depends on ratio of imbalance fee divided by curtailment cost have been obtained. By the simulation, about 20% of the cost can be reduced compared to fixed SOC target. The proposed method is verified by the numerical simulation.