Collaborative Planning Of Regional Integrated Energy Station Network Considering Pump Coupling And Optimal Layout

With the rapid development of the global economy,human dependence on energy has permeated all aspects,and the use of fossil energy has exacerbated the problems of energy shortage and environmental pollution.In recent years,vigorously developing renewable energy,reducing carbon emissions,and optimizing the energy structure have become important topics for countries around the world.The regional integrated energy system can achieve multi-energy coupling,and can flexibly plan the energy structure according to different needs.The energy station is closely connected and interacts with the energy supply network.Therefore,this article conducts research on the station network collaborative planning of regional comprehensive energy systems.Firstly,the structure of a regional integrated energy system was improved,and a new form of energy coupling using mechanical energy flow was proposed.A new architecture of a regional integrated energy system using water pumps as electrical and mechanical energy conversion equipment to participate in multiple energy coupling was designed.This paper introduces the basic structure and operation strategy of a regional integrated energy system,analyzes the energy coupling relationship and basic working principles of energy production equipment,energy conversion equipment,and energy storage equipment in the energy station,and provides the operation model of the equipment in the station and the loss model of the energy network.Then,based on the new architecture of water pumps participating in multi energy coupling,the mutual constraint relationship between water pump energy consumption and pipeline diameter was analyzed for the regional comprehensive energy station network collaborative planning under variable flow operation mode.A distributed water pump energy consumption model for the entire network was derived,taking into account power,thermal,and hydraulic constraints.A regional comprehensive energy system station network collaborative planning model considering water pump coupling under variable flow operation mode was established.The numerical simulation shows that considering the involvement of water pumps in multi energy coupling can improve the economic efficiency of the system.Finally,from the perspective of initial planning,the idea of optimizing the Minimum Cost Spanning Tree(MCST)was introduced to establish a comprehensive energy station network collaborative bilevel programming model considering the optimal layout.The upper layer aims to minimize the total investment and operation cost of the system,and constructs topology constraints to optimize the number,location,energy supply range and pipe network layout of energy stations;Based on the optimization results of the lower and upper levels,a configuration operation joint planning model is established to optimize the equipment capacity configuration and pipeline diameter selection of the energy stations within each zone.In terms of model solving,the improved grid method and Voronoi diagram are first used for partition dimensionality reduction.Then,to address the shortcomings of existing shortest path algorithm based optimization of pipeline layout,the Differential Evolution Algorithm(DE)is embedded into the Genetic Algorithm(GA)to optimize the minimum cost spanning tree,and the GA-DE-MCST planning algorithm is designed for solution.Finally,the effectiveness of the proposed method is verified through simulation of a 68 user node region.