A procedure to evaluate the risk of failure of distribution transformers insulation due to lightning induced voltages

Author

Lopes, Gustavo P. ; Martinez, M.L.B. ; Borghetti, Alberto ; Napolitano, Fabio ; Nucci, Carlo Alberto ; Uchoa, Juliana I. L. ; Dos Santos, Gilnei J. G. ; Fagundes, Donorvan R.

Author_Institution

Fed. Univ. of Itajuba, Itajuba, Brazil

fYear

213

fDate

10-13 June 213

Firstpage

1

Lastpage

4

Abstract

The aim of the paper is to assess the risk of insulation failure of distribution transformers connected to overhead distribution due to indirect lightning induced voltages. The annual frequencies of occurrence of dangerous voltages are evaluated through a Monte Carlo procedure and by using the LIOV-EMTP code for the calculation of the Lightning Electromagnetic Pulse (LEMP) and its effects on the multiconductor line. The probability of distribution transformers insulation to withstand the stresses caused by lightning overvoltages is inferred from the results of experimental test.

Keywords

EMTP; Monte Carlo methods; lightning protection; multiconductor transmission lines; overvoltage; transformer insulation; LIOV-EMTP code; Monte Carlo; distribution transformers insulation; insulation failure risk; lightning electromagnetic pulse; lightning induced voltages; lightning overvoltages; multiconductor line; overhead distribution;

fLanguage

English

Publisher

iet

Conference_Titel

Electricity Distribution (CIRED 2013), 22nd International Conference and Exhibition on

Conference_Location

Stockholm

Electronic_ISBN

978-1-84919-732-8

Type

conf

DOI

10.1049/cp.2013.1258

Filename

6683861