Low-Carbon Economic Optimal Dispatch Of Integrated Electricity-Gas Energy Systems Considering Energy Storage Lifetime Decay

As a new integrated energy supply system,the electricity-gas integrated energy system can not only meet the complex and changing energy demand but also increase energy security,which is of great significance in the context of promoting sustainable development and low-carbon economic transformation.The study on the optimal scheduling of electricity-gas integrated energy system can reasonably and effectively utilize equipment resources,avoid energy wastage and unnecessary losses based on satisfying users’ demands,and provide an important support role for the realization of the dual-carbon goal.To this end,the following research work is carried out in this paper on the economic optimal dispatching of electricity-gas integrated energy system:Firstly,this paper establishes the model of the electric-gas integrated energy system,introduces the basic working principle and operation mechanism of the main equipment in detail,and constructs the corresponding mathematical model.Then this paper analyzes the internal and external factors of battery energy storage life decay and establishes the battery energy storage life decay model from the two key physical quantities of capacity and charge state to measure the battery energy storage life decay.Secondly,based on the battery storage life decay model,an economic optimization dispatch model of electricity-gas integrated energy system considering energy storage life decay is proposed,with the lowest daily operating cost of electricity purchase cost,gas purchase cost,system operating cost,wind and light abandonment penalty cost and energy storage life decay cost as the objective function,and the renewable energy generation constraint,coupling equipment constraint,energy storage operating constraint and energy balance constraint as the constraints,and the particle swarm algorithm is used to optimize the output of each equipment in the integrated energy system and verify the effectiveness and economy of the battery storage life decay model.Finally,from the point of view of the low-carbon economic operation of the system,while considering the economic operation of the system,we should make rational use of the carbon dioxide produced by the comprehensive energy system to reduce the impact of carbon dioxide emissions on the environment.This paper first optimizes the load curve by using the comprehensive demand response to reduce the peak-valley difference of the load curve,and then uses the carbon capture system to capture the carbon dioxide generated by power generation equipment for supply to electricity-to-gas equipment.then introduce a step-by-step carbon trading mechanism to trade the remaining carbon dioxide emission credits in the carbon trading market to obtain carbon trading benefits,and those who exceed the carbon dioxide emission credits will be punished by carbon.Finally,the system low-carbon economy optimal scheduling model with the lowest daily operating cost as the objective function is established,which includes carbon transaction cost,abandoning wind and light penalty cost as the objective function,and the low-carbon and economy of the scheduling model proposed in this paper are verified by three different scenarios.