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摘要
In view of the impact of wind power uncertainty on the economic and safe operation of power grid dispatching, fully considering operational advantages of flexible charging and discharging of energy storage, a multi-objective interval energy storage economic dispatch optimization method based on improved equilibrium coordination algorithm is proposed. Considering inherent coupling relationship between active power dispatch and reactive power optimization, a multi-objective interval energy storage economic dispatch optimization model is established to minimize voltage deviation and overall operation cost of typical daily operation. During the optimization, firstly in the interval dispatching model considering DC power flow, the uncertainty of wind power is handled by optimizing outputs of energy storage and generators. Then, the improved algorithm is used to optimize active-reactive dispatching model to obtain equilibrium optimal solution by considering AC power flow as well as the security and economy of the grid. The paper also analyzes the impact on system dispatch operation from the perspective of different interval fluctuations of wind power and the scale of wind farms connected to the grid. Finally, this paper compares optimal solution of the improved algorithm with Pareto optimal solution obtained by ideal point method with weight coefficients, which can avoid subjective factors when determining the weight factors. The rationality and feasibility of the proposed model are verified through the simulation of IEEE RTS-24 system. ? 2021, Editorial Department of Control Theory & Applications South China University of Technology. All right reserved.
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