Reactive Power Optimization Of Active Distribution Network Based On Soft Open Point

With the advancement of science and technology and the improvement of people’s quality of life,the AC power distribution method adopted by my country’s power distribution network can no longer meet the needs of some users.In addition,large-scale intermittent distributed generator access has changed the closed-loop design and the operation mode of open-loop operation of the distribution network,and the distribution of power flow have increased the probability of voltage over-limits at some sensitive nodes,and put forward new challenges to the safe and stable operation of the distribution network.In recent years,power electronic devices and their control technology have developed rapidly.The flexible interconnection technology of distribution network based on soft open point can provide fast and accurate power exchange control,thereby optimizing the system trend,and gradually becoming people’s research hotspots.Therefore,this paper proposes a two-layer model in which capacitor banks and soft open point participate in active power optimization in order to solve the problems of active power distribution network,such as large network loss,large voltage deviation and reactive power deficiency.Mainly completed the following work.(1)Introduce the working principle and mathematical model of SOP,and prove the effectiveness of SOP for the optimization of distribution network by listing the flexible interconnection projects that apply SOP to participate in the operation of distribution network at home and abroad.(2)With the goal of minimizing voltage deviation and system loss respectively,the twolayer optimization model of the active distribution network of the capacitor bank and SOP is established,and the time sequence is added to form a time sequence optimization model.The upper level plans the location of the capacitor bank and the number of switching groups,and the lower level plans the location of the SOP.(3)Proposed an improved wolf pack algorithm,simulation and comparison of particle swarm algorithm,genetic algorithm,wolf pack algorithm and the proposed improved wolf pack algorithm,prove the effectiveness and robustness of the improved wolf pack algorithm.(4)The optimization model proposed in this paper is simulated and verified on the IEEE33-node system.The results show that the model proposed in this paper can effectively reduce the system voltage deviation and loss.