Research On Planning Method And Evaluation System Of Integrated Energy System Including Demand Response

The "dual carbon" goal is the value orientation of our energy system,at the same time,energy shortage and environmental pollution are becoming increasingly serious,promoting the green and low carbon energy transformation.In this context,the study of how to low-carbon economy planning comprehensive energy system has become a current research hotspot.The evaluation of integrated energy system can provide important reference for the selection of planning scheme.In this paper,the integrated electrical and thermal energy system is taken as the object,a low-carbon economic planning method considering demand response is proposed,which can realize the optimization of system equipment capacity,charging and discharging state,equipment output power,load participation in demand response state,and construct a comprehensive evaluation model to sort different planning schemes.The main work of this paper is as follows:Firstly,according to the processing ways of input and output energy of different power supply devices,the classification modeling of power supply devices is carried out.According to the working characteristics and energy conversion relationship of each equipment,the mathematical models of each equipment are built.The demand response model is established according to the replaceable and transferable characteristics of load.The overall framework of the comprehensive energy system has been built.Secondly,taking the whole life cycle cost including demand response cost and carbon trading cost as the objective function,and considering equipment constraints,load constraints and system constraints,a comprehensive energy system planning method is proposed.The energy storage and load models are linearized by the large M method.Finally,the optimization of equipment capacity,charging and discharging state,equipment output power and load participation in demand response state is realized.Then,the relevant influencing factors and the influence degree of each factor are compared and analyzed by using basic examples.The concept of load matching degree is put forward to quantify the correlation between wind-power output and load curve.The system has different requirements for device configuration based on the load matching degree.Different carbon trading models are compared.The effects of introducing transferable load and substitutable load were compared,including reducing the peak valley difference of load and reducing the system planning cost.Finally,combined with the planning model,a comprehensive energy system evaluation system was established from four dimensions:economic benefit,system energy efficiency,system flexibility and low-carbon operation.Using linear weighting method,the objective weight of information is used to modify the subjective weight,and a certain coefficient is given to develop the comprehensive weight of subjective and objective integration.The GRA-TOPSIS decision model is constructed.Scheme ordering is obtained based on the index values of different scenarios.It is hoped that this paper can provide reference for the planning and construction of comprehensive energy system.