Abstract
The adequate protection against lightning surges and the limitation of the expected annual failure rate of high-voltage substations are critical issues, in an effort to secure the safety of the equipment and the personnel. Various factors affect the lightning performance of the substations, determining the developed lightning surges and the expected outage rate, i.e., the grounding resistance, the length of the underground cable between the connected overhead transmission line and the power transformer, and the installation position of the arresters. In the current work, a heuristic method is developed to adjust different parameters of high-voltage substations that upgrade their lightning performance. The proposed methodology can be useful to the studies of substations’ designers and engineers, contributing effectively in the reduction or/and elimination of lightning failures.
Highlights
The lightning performance of high-voltage substations is primarily concerned with the distribution and transmission network operators, since lightning surges contribute to the dielectric stress and the ageing of the insulation
The analysis presented in the previous sections reveals that the adjustment of the parameters that influence the expected failure rate of the substation, in a technically and financially affordable way, is vital for power utilities, in order to enhance the lightning performance of the substations and increase the reliability of the electrical network
The presented heuristic method is proven to be advantageous for the effective design of the lightning protection system of high-voltage substations, where the reliability requirements are at a premium
Summary
The lightning performance of high-voltage substations is primarily concerned with the distribution and transmission network operators, since lightning surges contribute to the dielectric stress and the ageing of the insulation. This can lead to failures of the various components of the substations, may result in interruption of the power supply, and are related to dangerous repercussions for the safety of the equipment as well as the personnel [1]. The design of the lightning protection system of high-voltage substations intends to limit the expected outages of substantial equipment of the substations due to lightning overvoltages. Various factors influence the protection level and the effectiveness that the applied protective measures provide such as the lightning hit position, the length of the underground
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call