Evaluation of overhead transmission lines operation based on grey relation correlation

To achieve the scientific maintenances for overhead transmission lines and the security of operation state of overhead transmission lines, the grey relation method was used to analyze hierarchy process for overhead transmission lines, and an operation theory comprehensive evaluation model was established. According to the constitute components of overhead transmission lines, 5 kinds of characteristic relation evaluation object factor sets were defined , the typical grey relation evaluation object factor sets and the partner factor were chosen , and optimum grey relational constitute components were ascertained. Moreover, grey relational coefficients about all kinds of chosen components were comfirmed by the grey correlation theory, the facter weight was calculated by the analytic hierarchy process, and grey relational coefficients were calculated by the grey relational coefficients matrix multiplying facter weight matrix. Finally, the correlation was used to analyze and comprehensively evaluate. Good results can be achieved on the basis of the calculation and analysis of the actual overhead transmission lines. It is indicated that the grey relation method can examine and repair overhead transmission lines job according to actual overhead transmission lines operation state in progress, and may economize large amount of manpower and financial resources.