Overhead transmission line differentiation state evaluation method

The invention discloses an overhead transmission line differentiation state evaluation method, and the method comprises the steps: determining the state evaluation input quantity of a to-be-evaluatedoverhead transmission line according to expert evaluation information, line body information and an operation index quantity obtained through an online monitoring device; determining a section type towhich the overhead transmission line belongs according to the longitude and latitude of the overhead transmission line; and calling a line state evaluation model corresponding to the determined section type to realize differentiated state evaluation of the overhead transmission line. Differentiation evaluation of the working section of the ground wire can be well achieved, priority processing ofdefects is achieved for important areas such as crossing lines and disaster-prone areas, the reliability of a power system is improved as much as possible, the defect that evaluation is conducted onlyaccording to line operation