Research On Optimization Of Integrated Energy System Scheduling Based On Weak Robust Optimization Theory

In recent years,with the development of economy and society,the proportion of natural gas power generation has been increasing,and the coupling degree between wind power system and natural gas system has deepened in the integrated energy system.At the same time,the uncertainty of wind power system has brought huge impact on traditional dispatching.challenge.To this end,the introduction of electric gas-transfer devices and consideration of demand response can reduce the abandonment of wind power,enhance the ability of wind power consumption,improve the operational economy of the integrated energy system,and achieve the “peak clipping” of the electrical system electrical load.Under this background,an integrated energy dispatching model with cogeneration unit,electric gas conversion technology,circulating fluidized bed boiler and gas unit was established.The research on the optimization of the model,the realization of the objective function and the improvement of the optimization algorithm are carried out.Firstly,aiming at the uncertainty of wind power,referring to the traditional robust optimization theory,the comprehensive energy dispatch optimization model is reconstructed with the goal of minimum operating cost and minimum pollutant emissions.In order to make up for the shortcomings of traditional robust optimization theory,an improved weak robust optimization is proposed,and weak robust coefficients are introduced to improve the conservativeness of traditional robust optimization and the processing of objective function deterioration.The optimal solution under different conservative degrees is obtained by adjusting the weak robust coefficients.Secondly,Under the original comprehensive energy scheduling model based on weak robust optimization,considering the demand response,a two-layer optimization system structure is designed to optimize the stratification of electricity and gas in the integrated energy system.It embodies the coupling relationship between the upper layer and the lower layer.By optimizing the mutual response relationship of the layers and combining the improved weak robust optimization,the coordinated optimization of the electric/gas system is realized to realize the wind power consumption in the scheduling period.Finally,an integrated energy dispatching optimization model is established with the goal of comprehensive energy economic cost and minimum demand response cost,and a two-layer optimization structure is designed based on improved weak robust optimization.The penalty function is used to process the constraint condition and the objective function,and the improved algorithm is used to solve the problem.The feasibility and economy of the proposed model are verified by numerical simulation,and the correctness and effectiveness of the improved algorithm are calculated.