Catenary State Assessment Based On G2-Entropy Method

With the rapid development of high-speed railway electrification construction in China,a safe and reliable traction power supply system is a very important link to ensure the normal operation of high-speed railways,and also leads to an increasing pressure on the operation and maintenance of traction power supply system.In the traction power supply system fault,the fault caused by the catenary occupies the main part.The health assessment of the current operating state of the catenary can effectively help operators accurately understand and grasp the system status.The status of maintenance provides the basis.This paper analyzes the background significance and research status of existing catenary health diagnosis and risk assessment.By comparing the characteristics of existing methods,this paper proposes a G2-entropy method based on the state of the catenary characteristics assessment program: 1.Through the introduction and comparison of the features and respective advantages of the objective analysis method and the subjective analysis method in the weight determination method,the indicators are unified and dimensionless.Then use G2 method to obtain the subjective weight of each index according to expert experience.At the same time,use entropy weight method to obtain the objective weights of each index.Finally,use the multiplier integration method to synthesize subjective and objective weights to obtain the comprehensive weight of each index and get the status of catenary.The evaluation function of the characteristics;2.The evaluation index system used in this paper was constructed using the method of state assessment of the catenary,and the evaluation criteria and standards were divided.Comprehensively consider the subjective and objective influences,find the state of catenary state characteristics;3.Finally compared with the state assessment results obtained by the clustering method,analyze the differences in different assessment results.