Research On CCHP System Scheduling Strategy Considering Demand Response

In recent years,with the rapid growth of energy consumption in China,a series of problems have arisen,such as contradiction between supply and demand,environmental pollution,and energy security.It is urgent to transform the energy consumption structure.In this case,various forms of renewable energy,including solar energy,wind energy,geothermal energy,and biomass energy,have developed rapidly and have reached a certain scale.As China has formulated an action plan for peaking carbon emissions by 2030,optimizing the industrial structure and energy structure,vigorously developing new energy,and promoting the green transformation of production and lifestyle,it is foreseeable that a clean and efficient combined cooling,heating and power system(Combined Cooling,Heating and Power,CCHP)will have great development prospects in the future power system.In addition,with the promulgation of national policies such as the "Guiding Opinions on Promoting the Development of‘Internet+’ Smart Energy",the load side has participated in flexible and autonomous demand-side response,and the economic efficiency of the operation of distributed power generation systems such as CCHP systems will also be greatly improved.Therefore,this article has carried out the following work with the CCHP system of industrial parks as the research object:First of all,for the integrated energy system of CCHP,many studies have shown that its economic benefits largely depend on the pros and cons of the system’s scheduling strategy.In order to discuss the economic dispatch strategy of this kind of integrated energy system,this paper takes the CCHP system of a certain industrial park in Wuhan as the research object,adopts the bus-bar modeling theory,and fully considers the operation of each equipment in the system,and establishes the details of the equipment in the park.The mathematical model lays the foundation for the follow-up study on the accuracy of its scheduling plan.Secondly,in view of the huge benefits brought by the CCHP system in environmental protection that many current studies have ignored,this article comprehensively considers the daily operating costs and environmental governance costs of the park to construct a comprehensive objective function and study in detail its time-sharing scheduling strategy of daily in typical summer and winter days.The IPOPT nonlinear mathematical planning tool is used in MATLAB to find the economically optimal solution for operating costs,and a detailed comparison of operating costs and environmental benefits with traditional electricity and gas schemes is made.Finally,in view of the huge amount of electricity and gas used in the CCHP system in the industrial park,this paper considers the grid-side’s load curve satisfaction index and the CCHP system satisfaction index,and sets the peak and valley price of natural gas prices as analogy to the electricity price,and proposes gas power based on the above satisfaction.The joint peak and valley pricing has been studied in detail the economics brought about by the CCHP system participating in price-based demand-side response.The research results prove that the gas-electricity joint time-sharing pricing proposed in this paper further improves the economics of the CCHP system in the industrial park to participate in the demand-side response based on the original optimized dispatch,and it benefits both the power grid and the system.Based on the research results of this article,this article provides a certain engineering reference value for the research on the economic and environmental protection of the optimized operation of the CCHP integrated energy system in industrial parks and the way it participates in the demand-side response.