Abstract
The first step in the accepted methods of overhead transmission line insulation coordination is to specify a reliability criterion, and then based on this constraint the most economic insulation design is sought. While the objective of an optimal insulation design method is to find an insulation design that minimises the total cost (the sum of the installation cost, operational cost and cost of failure), each of the cost components can be determined on a per-year basis taking into account the equipment’s lifetimes. In this paper, through application of ATP software and realising the total cost of different transmission line designs, a set of alternative insulation designs using various surge protection options are proposed. Employing the optimisation algorithm, an optimised insulation design for transmission line is achieved. Finally, this new method is employed for insulation design of a sample transmission line. The resultant cost savings of the new method is considerable and can result in a major saving.
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