Reactive Power Optimization Of Distribution Network With Distributed Generation Based On Improved Firefly Algorithm

The cost-benefit,safety of power supply and power quality are facing severe tests.As distributed power sources are connected to the distribution network,the network loss and node voltage of the system have undergone major changes compared with the traditional distribution network.Therefore,during the operation of the power system,paying attention to the reactive power optimization of the distribution network is of great significance for effectively reducing the system loss and improving the voltage quality.First,this paper introduces the research background and significance,expounds the research status of distribution network reactive power optimization and the research status of reactive power optimization model algorithm.It analyzes the influence of distributed power generation on the node voltage and active power loss in the distribution network after being connected to the grid,and advances the calculation model of different types of DG and the type of grid connection interface,which laid the foundation for power flow calculation.Secondly,this article analyzes the traditional power flow calculation method of the distribution network,and improves the conventional forward-backward method to adapt to the new network structure.The simulation results of a numerical example show that the changes in system network loss and voltage are closely related to factors such as distributed power node types,power capacity,and access point locations.Finally,this paper builds a distribution network reactive power optimization model with distributed power generation(DG).By controlling the output of the distributed power supply,the transformer tap gear and the reasonable configuration of the reactive power compensation device capacity,the goal of the smallest network loss and the smallest voltage deviation can be achieved.At the same time,the author introduces linearly decreasing weights to improve the Firefly algorithm,and applies the improved Firefly algorithm to the reactive power optimization of the distribution network with DG.The results of the calculation example show that the network loss and voltage quality of the system are significantly improved after reactive power optimization,which improves the cost-benefit and reliability of the distribution network operation.The validity of the established reactive power optimization model and the applicability of the improved Firefly algorithm are verified.