Research On Optimal Configuration Method Of Multi-form Microgrid System Based On Power Flow Calculation

Under the dual pressure of resource shortage and environmental pollution,renewable energy has been developed rapidly.As a flexible solution for the consumption of distributed renewable energy,microgrids have broad development prospects under the new power system and dual carbon goals.At the same time,a high proportion of power electronic equipment access and advanced control and information technology are actively promoting the application of microgrids to multi-form scenarios.According to the operation characteristics of multi-form microgrids,formulating an appropriate optimal configuration scheme is the core issue of microgrid planning and design,which has a direct impact on the operation scheduling and economic benefits of microgrids.Traditional research methods such as microgrid planning theory,operation scheduling,and optimization modeling face challenges.Therefore,it is of great significance to carry out the corresponding optimal configuration for different operation strategies of microgrids.This paper analyzes the influence of distributed power access on microgrid power flow under the background of high proportion of renewable energy connected to microgrid,focuses on the optimal modeling of microgrid system,and studies the optimal configuration of multi-form microgrid system.Firstly,based on the research status of microgrids at home and abroad,the power flow calculation and optimal configuration of microgrids are analyzed and considered,and the power generation and operation characteristics of distributed power sources are modeled.The power flow analysis of a microgrid containing distributed power sources was conducted,and the location and capacity of distributed power sources were determined through a 33-node microgrid system,which provides a theoretical basis for subsequent research.Secondly,according to the different operation strategies of a single microgrid in off-grid and on-grid states,optimal configuration models are constructed respectively,and particle swarm optimization algorithm is used to calculate the optimal configuration of distributed power source.Finally,under the hierarchical control structure of microgrid group,the operation strategy of microgrid group is formulated,a two-layer optimization model is constructed,and the optimal configuration and operation scheduling results of each submicrogrid are calculated and analyzed.The research results of this paper enrich the theories and methods of optimal modeling and capacity configuration of multi-form microgrid systems,and provide a new reference for the planning,design and optimal operation of microgrids.When planning microgrids,regardless of whether a single microgrid or a multi-microgrid,in off-grid or on-grid mode,on the basis of considering the influence of distributed power access on the power flow of the microgrid,corresponding operation strategies are formulated according to the actual situation to determine the optimal construction location and construction scale.