2021 4th International Conference on Energy, Electrical and Power Engineering (CEEPE) | 2021
Economic Dispatch of Wind-hydro-thermal Power Systems Considering Reservoir Flexibility
Abstract
Confronted with considerable intermittence and variability of wind power, the flexibility of the power system that balances the uncertainties is gradually inadequate. Power systems are confronted with a huge challenge of renewable energy integration under insufficient flexibility. Therefore, this paper proposes an economic dispatch model for wind-hydro-thermal power system considering the reservoir flexibility. Through establishing a dynamic control model of flood limit water level (FLWL), the flexibility of reservoir shrunken by the static FLWL in flood season is exploited. This dynamic model is based on the pre-released capacity constraint method and real-time forecast information, which can improve the flexibility of the reservoir without increasing the flood control risk. Simulation results on the IEEE 30-bus system verify the effectiveness of the proposed model.