Optimized Operation Method Of Integrated Energy System Considering Load Aggregators

With the development of society and economy,the issue of energy shortage and environmental pollution have become more and more prominent.The traditional energy structure is facing problems of system inefficiency and redundancy under the environment of large-scale promotion of clean energy and increasingly diverse energy demand.The revolution of energy production and consumption has become an urgent task.The coordination and complementation of multi-energy have gradually become the development direction of energy utilization,and also provide an application environment for the user-side integrated energy demand response of cold /heat and electric load.The integrated energy system can realize the cascade utilization and coordinated scheduling of energy,and optimize the energy supply system horizontally through the coupling relationship between energy sources;while the load aggregator integrates the elastic load in many small and medium loads and centrally controls,and taps the demand side response potential.Longitudinal optimization of the energy system.The energy hubbased integrated energy system model can decouple the conversion relationship between energy input and output,and use the coupling matrix to describe the energy conversion,storage,and transmission relationship between electrical energy,gas and cold and heat load.Based on the above background,the main work of this paper is as follows:Firstly,according to the energy conversion and energy storage equipment,the corresponding mathematical model is constructed.Based on the energy hub model,this paper constructs a regional integrated energy system model for energy input,conversion,energy storage and output.Secondly,according to the load characteristics of the users,the corresponding aggregator models are established according to the elastic load characteristics,including the load-reducing aggregator,the transferable load aggregator,and the temperature-controlled load aggregator.Based on this,the aggregator model is extended to the regional integrated energy system model based on the energy hub model.Thirdly,using the established regional integrated energy system model considering the load aggregator,the operation optimization model is constructed with the minimum operating cost as the target,the equipment operation constraint and the energy supply and demand relationship as constraints.Taking the typical daily load data of an industrial park as an example,the optimal operating conditions of the equipment under typical days and the optimal operating conditions of the demand side response of the load aggregator are obtained,and the output characteristics of each equipment in the system are carried out.The analysis and the sensitivity of the system were analyzed from the perspectives of the operating characteristics of the cogeneration unit,energy price and demand side response capacity.Finally,the work of this paper is summarized,and on this basis,it points out the direction to be further deepened in the future research work.