Low Carbon Economic Dispatch Of Integrated Energy Systems With Carbon Trading Mechanisms And Integrated Demand Response

As the world’s climate is becoming more and more severe,it is urgent to reduce greenhouse gas emissions.The power sector,as a major source of CO₂emissions,has a huge reduction potential.So it is very important to develop low carbon energy positively.Along with the fast developing of Intelligent Grid,the customer’s reaction has been applied to the electric system’s running and managing,which has an effect on the development of the country.Moreover,as an essential renewable energy resource,wind energy has a key effect on low-carbon production in the power sector.But along with the fast growth of Chinese wind-energy generation capability,the energy consumption has been one of the most important factors for the development of wind energy.Moreover,it is an efficient approach to introduce CO₂trading into the economical running of the power grid to realize energy-saving and emission reduction.On this basis,this paper takes the electricity-gas-heat multi-energy system as the main body of research,and carries out research and analysis on the optimal scheduling of integrated energy systems on the basis of carbon trading and integrated demand response on the user side,which includes the following aspects:Firstly,the overall structure of the integrated energy system is divided from three aspects:energy supply,energy conversion and storage,and the operational characteristics of new energy generating units on the energy supply side and gas turbines,gas boilers and electricity-to-gas equipment on the energy conversion and storage side are studied,and mathematical models of each unit are established.Based on the different operational features of energy consumption load,this paper researches on the relevant techniques and analyzes the operation theory and mechanism of different kinds of requirements.Secondly,on the basis of IES multiple load response and dispatchability,the single electricity demand response,which was originally considered only under the influence of time-sharing tariffs,is extended to a comprehensive electrical and thermal demand response,and a comprehensive demand response model is built that takes into account the common commodity characteristics of electricity and natural gas energy and the thermal inertia and delay characteristics of thermal energy;taking into account the cost of purchasing primary energy,the operation and maintenance cost of energy equipment,and the cost of IDR compensation,a comprehensive demand response model is established with the total system cost minimised as the objective.The IES optimal dispatching model is established with the total cost of the system minimised as the optimisation objective;through simulation,it is verified that the implementation of the integrated demand reaction strategy can be used to deal with different kinds of loads and to facilitate the flexibility of time and space transfer.Moreover,it can take advantage of the complementarity of the energy resources to enhance the integration of both the supply and the demand,so as to enhance the whole system’s effectiveness.Finally,to further enhance the economic and environmental benefits of IES,an IES optimisation dispatch model is developed that takes into account a stepped carbon trading and integrated demand response strategy.In order to increase the weight of initial carbon emission rights and carbon trading costs in its carbon emission limit,the range of excess emission intervals is determined according to the difference between the actual carbon emission level and the initial emission amount of the system,and an excess interval multiplier price is set.Under the condition of ensuring the supply of demand-side load,the equipment output of the system internal synergy is adjusted to achieve the reduction of the total carbon emission of the system,and the operation results are compared with those under the condition of not including carbon trading and including traditional carbon trading to verify that the stepped carbon trading can better control carbon emission while taking into account the economic benefits.