Research On Economic Evaluation Of Transmission And Transformation Project Using Combined Model

In recent years,the electricity consumption of the whole society has been rising,which puts higher requirements on the safety and reliability of power supply for power grid enterprises.The investment in the construction of power infrastructure projects has increased year by year.As a core part of the power infrastructure,power transmission and transformation projects have far-reaching impact on the power quality of power grid enterprises and the economic development of the entire society.At the same time,the power transmission and transformation project has the characteristics of large investment scale,long construction period and slow investment recovery.The economic benefits after its operation directly affect the operating efficiency of the power grid enterprises,and will also affect the economic and social development speed.Therefore,it is very important to evaluate the economic benefits of power transmission and transformation projects.This paper studies the economic benefit evaluation method of power transmission and transformation project to objectively reflect the economic benefits brought by the project to enterprises and society.This paper takes the power transmission and transformation project as the research object,constructes the index system and model from the perspective of corporate finance and national economy,and evaluates the comprehensive economic benefits.The article firstly combs the current situation of economic evaluation of power transmission and transformation engineering Domestic and foreign.Based on the systematic research of relevant theories and methods,according to the characteristics and evaluation principles of power transmission and transformation projects,the main points of economic benefit evaluation are discussed.Next,the economic evaluation index system including financial evaluation and national economic evaluation is constructed,and the quantitative methods of each index are proposed.At the financial level,considering the technical characteristics of the power transmission and transformation project to improve the grid,the benefits is included in the indicator system,and build four secondary indicators of profitability,solvency,operational capability and grid technology characteristics to improve benefits.At the national economic level,consider the nature of the social infrastructure of power transmission and transformation projects,based on the external theory,four secondary indicators of network benefit,demand side benefit,social benefit and environmental benefit are constructed.In the process of index quantification,the incremental benefit identification method and the comparison method are used.Then,the model of BP neural network and genetic algorithm are analyzed.And make full use of the two methods'advantages,GA-BP neural network model is established,and the fitting effect is better after training.Finally,taking a new 66kV power transmission and transformation project as an example,based on the research and collection of data,its financial and national economy indicators were calculated and analyzed,and the combined model was used to carry out comprehensive economic evaluation.The evaluation index system and evaluation model constructed in this paper can provide a reasonable evaluation method for the economic benefit evaluation of similar projects,provide reference for the investment decision of subsequent projects,and provide ideas and methods for economic benefit evaluation of other projects.