Heat And Power Joint Optimization Based On Thermal Inertia Of Heating Network And Electric Heating

Facing the serious wind curtailment problem in China,this paper mainly answers the following two questions:“how is the wind power absorption ability of heating system's thermal inertia and electric heating technologies”and“how to plan the electric heating technologies to realize the optimal economic benefits”.Firstly,using the modeling method,this paper involves different components of electricity and heating system,and builds up a heat and power joint optimization model considering thermal inertia and electric heating.This model is used in the scenario analysis based on different system scenarios.Secondly,sensitivity analysis is carried out in this paper,in order to estimate the influence of different parameters on running cost,and some other indicators,and provide reference to policy makers.At last,this paper calculates the economics of different electric heating methods during the lifetime.Main achievements are listed as follows:?1?Using the method of modeling optimization,a heat and power joint optimization model is built up,considering thermal inertia of heating system and electric heating technologies,considering CHP units,wind power,electric heating?electric boilers and heat pump?,heating network and heat users.The model includes thermal inertia of heating hetwork and heat users,as well as the thermal comfort of heat users.This model provides the basic tool for further optimization and research.?2?Base on the realistic data of power grid and heating network in Changchun,Jilin province,different scenarios are set up,considering the electric beat boiler with heat storage,heat pump and thermal inertia of heating network separately.The main indicators of the system including the operating cost,coal reduction,CO₂ emission reduction as well as the wind power absorption ability.Through analysis,the cases that have the lowest operating cost,highest coal saving and greatest wind power absorption are found out.Consequently,the validity of this model is verified and the results could provide reference to the real planning and dispatching.?3?Sensitivity analysis on input parameters of the model is carried out,including economic parameters and non-economic parameters.As a result,the degree of different parameters'influence is analyzed quantitatively.Through sensitivity analysis,parameters that have high influence on the system are found out,which could provide quantitative reference to the policy-makers.?4?At last,based on the net present value method,the economic analysis of different electric heating methods is carried out,including the electric beat boiler with heat storage and the heat pump.According to the calculation,building heat pump has more economic benefit during its lifetime,and the optimum installation capacity exists,while the electric heat boiler has a relatively poorer economic benefit than heat pump.