Comprehensive Benefit Analysis Of Port Shore Power Based On Carbon Trading

With the continuous development of the global maritime transportation business,the environmental pollution problem in port areas is increasingly attracting attention.Government departments vigorously promote shore power instead of oil-fired power generation,which not only directly improves air quality and reduces noise,but also makes a significant contribution to achieving the goal of carbon neutrality.Due to the inability to coordinate the interests of all parties involved in the transformation of shore power,the utilization rate of shore power is generally low,and environmental pollution issues have not been resolved yet.This paper takes a port in Guangxi Beibu Gulf as the research object and conducts a multi-dimensional strategy analysis for the government,port and ship involved in the electric energy substitution project.Moreover,this paper constructs a mathematical model of electric energy substitution benefit analysis based on the cooperative game theory of multiple subjects under cap and trade and carbon tax policy respectively from the perspective of economics,in which the impact of carbon emissions caused by ships on the environment and society is transformed into economic value.The paper then explores the influence of various factors on shore power operations,such as retrofitting costs,ship electricity consumption,subsidy rates,carbon tax prices,and the proportion of time spent using shore power to docking time.In order to maximize social welfare,this paper finds the optimal electricity price for different scenarios and the benefits of each of the three parties at this time.Simultaneously,the environmental benefits generated in the oil-to-electricity conversion process are quantified,and pollutant and CO₂ emission reductions are calculated.The results of the study show that the social welfare under cap and trade is always greater than that under carbon tax policy.The proposed modeling method is verified to be effective in solving the economic benefits of each participant,which can boost the development of electric energy substitution project and provide a scientific basis for the formulation of related policy.In this paper,multi-objective optimization algorithms NSGA-II and NSGA-III are used to find the Pareto optimal solution sets among government benefits,port benefits,and oil-to-electricity ship savings.According to the specific situation,four scenarios are found in the Pareto optimal solution set that meet the maximum government benefit,maximum port benefit,maximum oil-to-electricity ship savings and the approximate utopian solution,as well as the economic and environmental benefits of each party under different scenarios.According to the research results,this paper suggests that the relevant departments can adopt carbon tax policy if they pursue the greatest government benefits,and adopt cap and trade if they pursue the greatest port benefits or the greatest oil-to-electricity ship savings.At last,this paper uses SWOT to survey the internal and external factors of using shore power in ports so as to devise shore power development strategies in several aspects,while pointing out the shortcomings of the study and future development directions.