Research On Integrated Demand Response Strategy In Integrated Energy System

The "multi-energy age" in which new energy and fossil energy complement each other has arrived.Demand side management(DSM)has attracted worldwide attention because of its high flexibility and great response potential.At the same time,the emergence of integrated energy system(IES)has broken the existing mode of independent operation of traditional energy systems,making the coupling of different forms of multi-energy flow more and more closely.Energy coupling and mutual substitution provide a new way to respond to demand side.Integrated demand response(IDR)emerges as the times require,and becomes the key to further tap the potential of demand side response and realize the interaction of superior and subordinate networks.Based on the above background,this paper carries out research work from the following aspects:1.The hierarchical interaction architecture of IDR is proposed,which clarifies the transfer relationship of information flow and energy flow.At the same time,the mixed time-scale interaction mechanism is used to coordinate resources at different rates,and the effects of prediction errors and disturbances are eliminated step by step.2.The model and evaluation method of user's adjustable ability are put forward to solve the problems of difficult description and incomplete evaluation dimension of adjustable ability.Firstly,active loads are classified and modeled according to their energy consumption characteristics and response characteristics.Considering the users'wishes and other factors,the evaluation index system of adjustable ability is established.Based on the grey target-prospect theory,the adjustable ability is calculated quantitatively.Finally,the adjustable value of users' participation in demand response is obtained through the fuzzy comprehensive judgment method,which lays a foundation for the formulation of multi-user comprehensive demand response strategy in Chapter IV and the screening of the main station in Chapter V.?3.A multi-user integrated demand response model was established to support users in formulating demand response strategies.The user's demand for multi-energy flow like cold,heat and electricity are brought into the scope of demand response,and the complementarity and substitution between multi-energy sources are further excavated to meet the peak load regulation demand as the optimization objective,and the comprehensive demand response strategy of users is obtained.The case study shows that the proposed strategy can further tap the adjustable potential of users and maximize the response potential with a lower subsidy cost,thus effectively alleviating the power shortage and achieving a win-win situation between grid and users.4.An optimal combination method of demand response users based on bidding model is proposed.The main station energy management system evaluates the adjustable value of users according to the information reported by users.On the basis of meeting peak-shaving demand,the final user who participates in demand response is selected to make the overall response cost the lowest.The case study shows that the proposed strategy can achieve the optimal selection of users who participate in demand response,flexibly utilize adjustable resources,maximize resource utilization,and ensure the implementation of the response plan.