Research On Supply And Demand Coordination Scheduling Strategy And Method Based On Multi-Energy Coupled Industrial Park

In recent years,with the tremendous changes of power system on generation side and demand side,to build a stable,efficient and sustainable power system is the inevitable direction of development.Not only the power systems,but also other traditional energy systems are facing the same problems,such as thermal systems and gas systems.In order to meet these challenges,unified planning and regulation of multiple energy sources and mutual support are important solutions.Considering the integration and coordination of different energy supply sides and the unified dispatching of demand sides,the integration of multiple energy systems in industrial parks is an effective way to solve the problem.On the supply side,the three energy systems comprised of electricity,heat and gas can support each other and improve the energy supply capacity and efficiency,while the uncertainty and difficulty of regulation and control are increased as well.On the demand side,not only users of power system but also users of thermal-gas system have the potential and demand of dispatching.How to expand demand dispatching to multi-source demand dispatching and improve the potential of demand dispatching of multi-energy system is an urgent problem to be solved.In view of the above changes and problems,this paper takes the multi-energy coupled industrial park as the breakthrough point to analyze the characteristics of the industrial park,focuses on the analysis of the characteristics of the multi-source integrated demand response,and extends the demand-side dispatching to the multi-energy system.The specific research contents are as follows:(1)The integrated demand response(IDR)characteristics of industrial park including electrical,thermal and gas systems are studied,and the operation strategies and model classification of IDR are discussed.Through the analysis,it is concluded that IDR can provide customers with opportunities to participate in the operation of industrial park,which can not only increase the flexibility and reliability of the system,but also provide customers with more choices.The concept and detailed classification of IDR are given,and its technologies are divided according to the advantages and disadvantages.In the meanwhile.the current problems and future development trends are presented.For example,industrial parks based on integrated demand response can improve system efficiency and reduce costs from different aspects such as internet cloud storage system,demand-side comfort index integration platform and multi-level scheduling strategy.(2)The entity structure of industrial park is studied.Firstly,the dynamic reactive power optimization problem with discrete variables in power system in industrial park is elaborated.Through the study of dynamic reactive power compensation optimization algorithm,a double-level optimization mathematical model is established based on the characteristics of discrete reactive power compensation equipment,which can optimize the dynamic reactive power variables with mixed integer variables and ensure the stable operation of power system.Secondly,the multi-objective optimal power flow method of generation cost and load margin is studied to ensure the safe and stable operation of power grid and the optimal generation operation cost while obtaining the ideal load margin.(3)The electric-thermal-gas coupling characteristics of the multi-energy coupled system on the supply side are studied,and the low temperature heating network with the combination of heat and gas is used for analysis.Mutual support of multiple energy sources on the supply side improves the reserve capacity of generator sets and the efficiency of energy interactive utilization,and reduces the operating cost of the system.On the demand side,direct load control is extended to multi-energy coupled system.The optimal dispatching method of integrated direct load control participating in demand-side dispatching in the electric-thermal-gas coupled system is studied.The optimization of demand-side in the electric-thermal-gas coupled system by integrated direct load control can reduce peak load and increase demand-side elasticity.On the whole,an optimization model considering the integrated direct load control on both supply side and demand side the demand response of the multi-energy coupled electric-thermal-gas system is constructed.The constraints of demand side integrated direct load control participating in dispatching are analyzed.The optimal dispatching of electric-thermal-gas multi-energy system with supply side and demand side as a whole can be realized.(4)The application scenarios of cooperative game are studied and analyzed.Based on the electric-thermal-gas coupled industrial park,with the source-network-load multi parties participating in the scheduling,three scenarios of non-cooperative game,cooperative game and fuzzy cooperative game between non-cooperative game and cooperative game are constructed.The contract formulation scheme under cooperative game is given,and the benefits of three scenarios are compared and analyzed.The validity of cooperative game is verified by the benefits of participants,and the optimal benefit allocation method of multi-participants in cooperative game is given.