Research On Capacity Optimization Of Isolated Island Microgrid

As an effective method for connecting distributed energy sources to the power grid,the microgrid reduces the adverse effects of the connection of distributed power to the grid by integrating distributed energy,energy storage equipment and loads,and improves the reliability of distributed power supply.Microgrid can vigorously promote the grid connection of distributed power sources based on renewable energy,effectively increase the capacity of traditional power grids,and reduce greenhouse gas emissions.At present,it has become the latest subject of domestic and foreign power grid research.The capacity optimization of microgrid is to achieve the goal of stable and economic operation of the system by rationally configuring the capacity of distributed power generation and energy storage devices.This paper intends to study the capacity optimization configuration of the microgrid in two aspects: mathematical models and optimization algorithms.A more accurate mathematical model and an optimized algorithm with better performance are proposed.The specific work is as follows:This paper analyzes the current research status of photovoltaic pumped storage power stations in various countries and the research status of intelligent algorithms at home and abroad,and proposes an island-type microgrid model for wind turbine-photoelectric-pumped storage power station cooperative operation and the equipment in the island microgrid system.The mathematical model of the island-type microgrid introduces the working status of the pumped-storage power station under the two modes of pumping and power generation,establishes an objective function combining economic cost and load shortage rate,and fully considers the main equipment in the island-type microgrid The constraints of operation provide theoretical basis for solving the island microgrid model.Secondly,based on the analysis and research of the PSO algorithm,on the basis of the shortcomings of the original PSO algorithm,an n PSO algorithm that can speed up the convergence speed and better find the optimal value is proposed to achieve the purpose of faster convergence speed and higher accuracy.The comparison of the original PSO algorithm and the new PSO algorithm on different test functions using different learning factors validates the effectiveness of the proposed algorithm.This paper conducts planning research on an island microgrid and designs a new discharge strategy.In view of the differences in the characteristics of the original components and the corresponding operating constraints in the island microgrid system,the rational use of the energy storage system is the key to maintaining the economic operation of the microgrid,and the pumped storage power station is a highly efficient energy storage system in the energy storage system.the way.On the premise of ensuring the safe and economic operation of the microgrid,the proposed n PSO algorithm is used to optimize the configuration of the model.The optimizedconfiguration results of the n PSO algorithm,the DE algorithm and the PSO algorithm in typical days are studied.The results show that the n PSO can be used to optimize the microgrid in a short time.The capacity of the network is optimized to make the system respond more quickly and meet the balance of supply and demand faster.Finally,this paper studies the optimized configuration results of the n PSO algorithm,the DE algorithm,and the PSO algorithm under typical days.The results show that n PSO can optimize the configuration of the microgrid capacity in a short time,making the system respond more quickly and meet supply and demand balance.Simulation examples verify that the proposed microgrid capacity optimization management strategy can not only guarantee the safe,reliable,and long-term independent operation of the microgrid,but also reduce the capacity requirements for energy storage devices,save economic costs,and reduce environmental pollution.