Voltage elevation analysis of overhead distribution lines using the finite element method

This paper presents a methodological analysis to increase the power transfer capability of an overhead distribution line, by changing the rated voltage from 34.5 kV to 69 kV. The distribution line chosen for analysis was modeled on ATP software, using ATPDraw interface, and was submitted to various electromagnetic transients. From the overvoltage values observed in the simulations, new computer analysis were performed using the software FLUX^®, which is based on the finite element theory. FLUX^® was employed to evaluate the behavior of the electrical field in different pole types of the distribution line, considering the wood crossarms and ceramic insulators. Thus, this study evaluates the computer simulations carried out and points out which poles and crossarms of the original 34.5 kV line are already able to operate on 69 kV, without changing the overhead line spacing.