Two-Stage Decoupling Coordination Hybrid Dynamic Programming Method for Dynamic Reactive Power Optimization in Distribution Network

• 1、School of Electrical Engineering,Chongqing University,Chongqing 400044

Abstract：Dynamic reactive power optimization of distribution network is an important means to improve the quality of power supply and reduce power loss. In this paper, a dynamic reactive power optimization model for distribution network considering the characteristics of discrete control equipment operation cost segment is established, and a two-stage decoupling coordination hybrid dynamic programming algorithm for solving the model is proposed. In the aspect of model, the daily action times of discrete equipment can be achieved by building the action cost segment function, which meets the dual requirements of minimizing and not exceeding the limit as far as possible. In terms of algorithm, the first stage uses the interior point method to solve the discrete variable continuous problem of the original model to determine the continuous optimal solution of the model. In the second stage, based on the neighborhood search of continuous solution, the dynamic programming algorithm of dynamic reactive power optimization of substation and the decoupling coordination strategy between substations are used to realize the efficient solution of the model. In the second stage, based on the neighborhood search of continuous solutions, the dynamic programming algorithm of dynamic reactive power optimization and decoupling coordination strategy between substations are used to achieve the efficient solution of the model. Based on the actual data of a 220 kV control zone, a large number of simulation analyses are carried out. The results show that the proposed model and the proposed algorithm are effective.

Keywords： dynamic reactive power optimization action cost segmentation mixed integer nonlinear programming mixed algorithms dynamic programming