Energy Station-Network Collaborative Planning Of Regional Integrated Energy System

In order to solve the problems of energy shortage and environmental pollution and improve energy utilization efficiency,it is imperative to build and develop the Regional Integrated Energy System(RIES).The regional integrated energy system is composed of energy stations,energy supply networks and users.It realizes the mutual coupling and conversion of multiple energy sources through energy stations,and realizes the coordination and complementarity between energy stations through the interconnection of energy supply networks,to meet the various energy needs of users,and has a good economy and environmental benefits.Taking the regional integrated energy system as the research object,this paper constructs the basic framework and mathematical model of the regional integrated energy station-network system.From the two perspectives of considering the user’s flexible load participation in demand response and energy station-network optimization layout,the regional integrated energy station-network collaborative optimization planning is studied separately.Considering the impact of user participation in demand response(DR)on RIES planning,a two-layer model of regional integrated energy station-network collaborative planning that takes into account the flexible load is proposed.The upper layer conducts multi-objective optimization planning from three aspects:economy,pollution emissions and energy supply reliability.The lower layer optimizes the system operating cost by taking into account the demand response compensation cost.The multi-objective hybrid particle swarm algorithm is used to optimize the capacity configuration of the regional integrated energy station-network,then multiple candidate planning schemes are obtained,and a multiple attribute evaluation method based on evidence reasoning is used to obtain the optimal planning scheme.The calculation example shows that the user-side flexible load optimizes equipment capacity and output by adjusting the load curve,and realizes the best comprehensive benefits of the integrated energy station-network collaborative planning,which verifies the effectiveness of the multi-objective optimization model.Considering the impact of energy station-network layout on RIES planning,a two-level model of regional integrated energy station-network collaborative initial planning is proposed.At the upper level,the collaborative investment model of energy station-network is established based on the extended p-median model.The lower level fully considers the multi-energy flow coupling in the energy station and the multi-energy coordination of the inter-station network.A joint optimization model of planning and operation in multi-energy stations is established.The enumeration method based on the shortest path theory combined with the Cplex solver is used to solve the problem.While optimizing the station-network capacity configuration,the number,location of energy stations and the layout of energy supply network are planned together.The calculation example shows that the model realizes the energy transfer on the scale of time and space,and solves the problems of uneven load distribution and unbalanced peak valley demand in the traditional planning.At the same time,the economic benefits of the initial planning of considering the station-network layout is better.which is of guiding significance for the regional integrated energy planning and construction.