Research On Dispatch Of Integrated Electricity-Gas Energy System Based On Low-Carbon Targets

Compared with the traditional single energy system,IES can utilize the synergy of different types of energy systems to achieve carbon reduction function.The P2 G technology has promoted the development of IEGES.In order to improve the system’s ability to absorb renewable energy,and take into account system economic and environmental benefits,this paper studies the IEGES economic dispatch problem based on low-carbon targets,the main work is as follows:First,this paper analyzes the value of the coordinated and optimal operation of the power system and the natural gas system.In addition,the mathematical models of the power system,natural gas system,and coupling devices are analyzed,and the basic framework of IEGES is built.Next,considering the carbon absorption function of the P2 G device during operation,with the goal of minimizing the operating cost and carbon emission cost,an optimal system low-carbon economic dispatch model is established with the goal of minimizing the operating cost and carbon emission cost.The calculation example results show that when the system considers P2 G operation,it can not only improve the utilization rate of renewable energy,but also significantly reduce carbon emissions and operating costs.Thirdly,in the context of considering the operation of P2 G device,to study the influence of the operation uncertainty in wind and electricity side on system optimal dispatch,this paper uses the general distribution based on chance constraints to deal with the uncertainty of wind and electricity output,with the optimization goals of minimizing cost and carbon emission,a system low-carbon economic dispatch model is built.The improved second-order cone processing method is applied to the constraints of the electricity distribution network and gas distribution network.The model is transformed into a mixed integer linear programming model,and NSGA-II is used to solve the multiobjective optimization problem.The calculation example results show that the IEGES model constructed in this paper can absorb wind and electricity power,reduce carbon emissions,ensure the green and low-cost operation of the system.Finally,in order to study the impact of comprehensive demand response on IEGES,this paper takes integrated demand response into the optimal dispatching of the system,and proposes a system distributed low-carbon economic dispatch model considering integrated demand response.Considering that the electricity distribution network and the gas distribution network belong to different operating organizations,the distributed optimization solution of the two networks is realized by using C-ADMM,and the method applies in this paper has better convergence than the traditional distributed algorithm.The calculation example results show that integrated demand response participates in the distributed scheduling of the system,which can effectively improve the accuracy of scheduling while taking into account the economic and environmental benefits of the system.