A Bilateral Tradeoff Decision Model for Wind Power Utilization with Extensive Load Scheduling

Abstract

In this paper, we present the extensive load scheduling problem with intermittent and uncertain wind power availability. A chance-constrained bilateral tradeoff decision model is established to solve the problem. Our model aims at maximizing the wind power utilization and minimizing the system operation cost simultaneously by means of responsive loads, which are precisely divided into shiftable loads and high-energy loads. The chance constraint is applied to restrict the system imbalance with a small probability. Then, a revised sample average approximation (SAA) algorithm is developed to transform the chance constraint into sample average reformulations. Furthermore, the multi-objective differential evolution (MODE) method combined with SAA is proposed to solve the problem. Experiments enabling an effectiveness analysis of the two kinds of responsive loads are performed on the power system in Yancheng. The research of parameters of MODE, the sensitivity of different risk levels and the influence of iteration numbers are discussed. Finally, computational results prove that the combination of shiftable loads and high-energy loads have a better effect than adopting shiftable loads and high-energy loads separately, and the proposed method is convergent and valid in solving the problem.

Research on Two-Stage Regulation Method for Source–Load Flexibility Transformation in Power Systems

“…In recent years, a series of research on demand response technology has been carried out and gradually integrated with the industrial sector [28][29][30]. If the EIL adjusts their energy consumption according to the characteristics of wind power and actively participates in the power system dispatching, the current situation of power system dispatching will be greatly improved [31], the power system has will see improvements in both its flexibility and reliability, and the amount of wind power blockage will be effectively reduced. According to the regulation time and response speed of the EIL, the EIL is divided into two types: discrete adjustable load, continuously adjustable load, and interruptible adjustable load.…”