Environmental and economic scheduling for wind-pumped storage-thermal integrated energy system based on priority ranking

Abstract

With the rapid access of wind power clusters (WPC), it is difficult for the traditional active scheduling mode to take into account the security, economy and environmental protection of the power system. Pumped storage power station (PSPS), with its flexible regulation characteristics, can reduce the volatility of wind power and enhance the capacity of wind power accommodation to a certain extent. Therefore, this paper proposes an environmental and economic scheduling strategy for the wind-pumped storage-thermal integrated energy system, and rationally arranges the sequence of the units based on the principle of energy saving and emission reduction. The scheduling strategy involves optimizing operational decision-making for pumped storage units to enhance their regulation performance. Firstly, a pre-scheduling of the wind-pumped storage bundling system is carried out, aiming at achieving the highest wind power accommodation rate, the smallest output fluctuation and the lowest pumped storage scheduling cost. Next, the joint scheduling of the wind-pumped storage-thermal system is carried out, and the priority ranking method is used to arrange the generation schedule of the thermal units according to the optimal wind-pumped storage joint output. Finally, the proposed environmental-economic scheduling model is solved by the improved NSGA-II algorithm to verify the effectiveness of the scheduling strategy.