Lightning transients in low-voltage installations inside different types of class II lightning protection systems

Ibrahim A. Metwally, Fridolin H. Heidler

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents a numerical electromagnetic analysis of loop-termination voltages inside an outer lightning protection system (LPS) resulting from direct and indirect lightning strikes. The method of moments is combined with the transmission-line model and employed to model the whole structure in three dimensions and the lightning channel, respectively. Three distinct types of class II LPS are modeled with one- and three single-phase parallel vertical loops of the TN-S system inside the LPS. All cases are simulated by using the negative subsequent stroke current with linear-rising front at lightning-protection level II. The connected equipment at the loop terminals is considered in the offstate to simulate the worst condition. The results reveal that for the three-loop configurations, the middle-loop termination voltages of all floors are always higher than those of the outer loops and the frequency of oscillations of the middle loop is roughly twice that of the outer ones. In addition, the midedge strike case gives higher loop-termination voltages for all floors than those of the corner strike case. For the slender LPS, the effect of the strike location dominates in the case of high surge impedance of the feeder only.

Original languageEnglish
Pages (from-to)930-938
Number of pages9
JournalIEEE Transactions on Power Delivery
Volume24
Issue number2
DOIs
Publication statusPublished - 2009

Fingerprint

Lightning protection
Lightning
Electric potential
Method of moments
Electric lines

Keywords

  • Direct strike
  • Indirect strike
  • Lightning protection system
  • Lightning-induced voltage
  • Loop termination
  • Negative subsequent current
  • Transient analysis

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Lightning transients in low-voltage installations inside different types of class II lightning protection systems. / Metwally, Ibrahim A.; Heidler, Fridolin H.

In: IEEE Transactions on Power Delivery, Vol. 24, No. 2, 2009, p. 930-938.

Research output: Contribution to journalArticle

@article{c916ed9dc7234e5c83b9603b4dddc30f,
title = "Lightning transients in low-voltage installations inside different types of class II lightning protection systems",
abstract = "This paper presents a numerical electromagnetic analysis of loop-termination voltages inside an outer lightning protection system (LPS) resulting from direct and indirect lightning strikes. The method of moments is combined with the transmission-line model and employed to model the whole structure in three dimensions and the lightning channel, respectively. Three distinct types of class II LPS are modeled with one- and three single-phase parallel vertical loops of the TN-S system inside the LPS. All cases are simulated by using the negative subsequent stroke current with linear-rising front at lightning-protection level II. The connected equipment at the loop terminals is considered in the offstate to simulate the worst condition. The results reveal that for the three-loop configurations, the middle-loop termination voltages of all floors are always higher than those of the outer loops and the frequency of oscillations of the middle loop is roughly twice that of the outer ones. In addition, the midedge strike case gives higher loop-termination voltages for all floors than those of the corner strike case. For the slender LPS, the effect of the strike location dominates in the case of high surge impedance of the feeder only.",
keywords = "Direct strike, Indirect strike, Lightning protection system, Lightning-induced voltage, Loop termination, Negative subsequent current, Transient analysis",
author = "Metwally, {Ibrahim A.} and Heidler, {Fridolin H.}",
year = "2009",
doi = "10.1109/TPWRD.2009.2014492",
language = "English",
volume = "24",
pages = "930--938",
journal = "IEEE Transactions on Power Delivery",
issn = "0885-8977",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2",

}

TY - JOUR

T1 - Lightning transients in low-voltage installations inside different types of class II lightning protection systems

AU - Metwally, Ibrahim A.

AU - Heidler, Fridolin H.

PY - 2009

Y1 - 2009

N2 - This paper presents a numerical electromagnetic analysis of loop-termination voltages inside an outer lightning protection system (LPS) resulting from direct and indirect lightning strikes. The method of moments is combined with the transmission-line model and employed to model the whole structure in three dimensions and the lightning channel, respectively. Three distinct types of class II LPS are modeled with one- and three single-phase parallel vertical loops of the TN-S system inside the LPS. All cases are simulated by using the negative subsequent stroke current with linear-rising front at lightning-protection level II. The connected equipment at the loop terminals is considered in the offstate to simulate the worst condition. The results reveal that for the three-loop configurations, the middle-loop termination voltages of all floors are always higher than those of the outer loops and the frequency of oscillations of the middle loop is roughly twice that of the outer ones. In addition, the midedge strike case gives higher loop-termination voltages for all floors than those of the corner strike case. For the slender LPS, the effect of the strike location dominates in the case of high surge impedance of the feeder only.

AB - This paper presents a numerical electromagnetic analysis of loop-termination voltages inside an outer lightning protection system (LPS) resulting from direct and indirect lightning strikes. The method of moments is combined with the transmission-line model and employed to model the whole structure in three dimensions and the lightning channel, respectively. Three distinct types of class II LPS are modeled with one- and three single-phase parallel vertical loops of the TN-S system inside the LPS. All cases are simulated by using the negative subsequent stroke current with linear-rising front at lightning-protection level II. The connected equipment at the loop terminals is considered in the offstate to simulate the worst condition. The results reveal that for the three-loop configurations, the middle-loop termination voltages of all floors are always higher than those of the outer loops and the frequency of oscillations of the middle loop is roughly twice that of the outer ones. In addition, the midedge strike case gives higher loop-termination voltages for all floors than those of the corner strike case. For the slender LPS, the effect of the strike location dominates in the case of high surge impedance of the feeder only.

KW - Direct strike

KW - Indirect strike

KW - Lightning protection system

KW - Lightning-induced voltage

KW - Loop termination

KW - Negative subsequent current

KW - Transient analysis

UR - http://www.scopus.com/inward/record.url?scp=67349092820&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67349092820&partnerID=8YFLogxK

U2 - 10.1109/TPWRD.2009.2014492

DO - 10.1109/TPWRD.2009.2014492

M3 - Article

VL - 24

SP - 930

EP - 938

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 2

ER -