Optimal Operation Of Park Multi-energy System Considering Comprehensive Demand Response

The multi-energy system in the park is one of the main forms of the multi-energy system.The frame structure of the park system,equipment composition and dispatching operation are the basis for the study of the multi-energy system.Aiming at the current problems of unbalanced energy structure,low energy utilization rate,and difficulty in absorbing renewable energy in the park,this theis proposes an optimal operation plan for the park’s multi-energy system based on comprehensive demand response.The purpose of cutting peaks and filling valleys,thereby improving the consumption and utilization of new energy.Firstly,the multi-energy system in the park is outlined,the topology of the multi-energy system in the park studied in this paper is proposed,the mathematical model of each distributed unit in the multi-energy system in the park is established,and the output,start and stop of each equipment are restricted.According to the different operating characteristics of the user-side load in the park,through the study of demand-side response related technologies and the construction of demand-side response related mathematical models,the principle and operation mechanism of different types of demand response are deeply analyzed,including price-based demand response and incentive-based demand response.and alternative demand response.Secondly,construct a comprehensive demand response optimization model of the park that takes into account electricity,heat and gas loads.Incorporates an electrical load response model that adjusts the response characteristics over time.The thermal load response model is constructed according to the thermal inertia and time delay characteristics of the thermal load.A gas load response model is established based on the price-based demand response theory.The calculation example shows that the comprehensive demand response optimization model of the park can effectively increase the economy of the multi-energy system in the park,improve the stability and reliability of system coordination and optimization,and thus improve the absorption capacity of clean energy such as wind and solar.Finally,a multi-time-scale optimal dispatch of the multi-energy system in the park based on demand-side response is established.The scheduling process is divided into two processes: day-ahead scheduling and intra-day rolling optimization.Among them,the day-ahead scheduling model combines price-based and alternative demand responses to improve the optimal scheduling economy of the system by balancing unit output.Combined with the day-ahead scheduling plan,an intra-day rolling optimization model based on the Model Predicitive Control algorithm is established.Finally,the proposed optimal dispatching model is verified by the simulation of a numerical example.From the comparison of curves of different schemes,it can be seen that the corrected intraday rolling optimization curve basically matches the daily dispatching plan curve,so as to ensure the interaction between the external power grid and the heat grid.reliability.