Aging Risk Assessment based on Fuzzy logic for overhead transmission line

Many overhead lines that run for decades may lead to overload for their aging problem. To ensure overhead transmission line safety, this paper proposes a novel aging risk assessment method integrating aging mechanism analysis and fuzzy logic algorithm. The overhead transmission line tension is determined using a sag-tension model with the measured sag values of the line. According to the tension, the elasticity modulus of the line is calculated based on the Equation of state. By comparing with the elasticity modulus limits, the deformation is calculated based on the Tension-Deformation model. The aging condition of the line is assessed based on fuzzy logic together with the deformation and running time of the line. At last, the proposed method is shown its effectiveness with experiments.