Modeling and configuration optimization of the natural gas-wind-photovoltaic-hydrogen integrated energy system: A novel deviation satisfaction strategy

摘要

The integrated energy system (IES) coupled with renewable energy power generation and hydrogen energy storage (HES) is an effective way to achieve clean and low-carbon energy consumption, with great development potential. How to reasonably determine the system configuration scheme is a critical issue that needs to be solved urgently. This paper constructs a configuration optimization model. First, the mathematical model, objective function, optimization strategy, and constraints are given. Then, this study innovatively proposes an optimization strategy based on deviation satisfaction to construct the objective function, which can simultaneously optimize the two goals of annual comprehensive cost (ACC) and annual carbon emissions (ACE); the weight coefficients are introduced to reflect the different optimization preferences of decision-makers. The entire optimization model belongs to mixed integer linear programming and the case study gives the results under the same emphasis on ACC and ACE (W1 = 0.5, W2 = 0.5). The initial purchase cost structure shows that the cost of gas turbines, hydrogen storage tanks, and photovoltaic accounts for more than 70%. The cost of HES is high but the carbon emissions reduction effect of the system is considerable, and the ACE is only 6.63% of the traditional supply system. In the third part, sensitivity analysis results show that different optimization preferences could significantly affect the configuration results and the "cost-effectiveness" performance corresponding to each preference is different. The optimal optimization strategy interval is (W1 = 0.3, W2 = 0.7) to (W1 = 0.4, W2 = 0.6). The comparative analysis shows that the simulation results are reliable. Further analysis reveals that the current carbon tax base price is extremely unsatisfactory for the stimulus effect of the IES. Therefore, it is recommended to increase the base price of the current carbon tax.