Construction of Cost-benefit Optimization Model of Shore Power and Economic Analysis of Marginal Conditions
In the process of port shore power construction,this paper constructs a four-party cost-benefit model to address the issues of enhancing the benefits of the State Grid Corporation,ports,ships,and the government.Under the marginal conditions of subsidy rate for shore power equipment renovation,annual utilization rate of shore power equipment,and electricity price,it is deeply analyzed for the relationships between the subsidy rate for shore power equipment,electricity price,annual utilization rate of shore power facilities,and the profits of the four parties.Using a data sample of shore power construction at a certain port,the paper conducts a case analysis using the cost-benefit model constructed.The analysis results show that the profitability of the grid depends on the electricity price of the shore-based power supply facilities.As the government subsidy rate increases from 0 to 30%,the government's revenue decreases significantly,while the profits of the port company increase gradually.As the utilization hours of shore power increase from 200 to 4,000 hours,the marginal electricity price for the ship side will gradually decrease,and the ship-side shore power supply service price can also be reduced accordingly.The optimal marginal electricity price will change from being highly volatile to gradually stable as the utilization hours of shore power increase.If the annual utilization hours of shore power are less than 400 hours,all parties will suffer losses.The findings have important reference value for predicting the cost-benefit of port shore power construction.