Ground layer depth and the effect of GPR

This paper presents a substation grounding grid analysis with the variation of soil layer depth. The grounding grid system of a practical 22 kV substation, in which the ground grid is made from copper, is calculated by virtue of the CDEGS software. The study, supported by Provincial Electricity Auth...

Full description

Saved in:
Bibliographic Details
Main Authors: A. Puttarach, N. Chakpitak, T. Kasirawat, C. Pongsriwat
Format: Conference Proceeding
Published: 2018
Subjects:
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84907004006&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/60433
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
id th-cmuir.6653943832-60433
record_format dspace
spelling th-cmuir.6653943832-604332018-09-10T03:42:28Z Ground layer depth and the effect of GPR A. Puttarach N. Chakpitak T. Kasirawat C. Pongsriwat Engineering This paper presents a substation grounding grid analysis with the variation of soil layer depth. The grounding grid system of a practical 22 kV substation, in which the ground grid is made from copper, is calculated by virtue of the CDEGS software. The study, supported by Provincial Electricity Authority (PEA), Thailand, is based on grounding grid system of Royal Flora RATCHAPHRUEK substation. The supporting soil resistivity data has been obtained from field tests at the substation. The result shows that soil resistivity was interpreted to two-layer soil structure with low resistivity top layer and high resistivity bottom layer. The studied ground grid system is installed with constant 3 m ground rods. When the ground layer depth of the grid is increased, it directly affects to reduce the value of Ground Potential Rise (GPR). On the other hand, with the same grid configuration buried in the high resistivities bottom layer, its GPR is not reduced, that is, the more layer depth of high resistivities bottom layer, the more value of GPR. In addition, the grid with the different ground rods length also gives the different results. GPR is continuously reduced when the rod length is lengthened even though the bottom layer resistivity is higher than the top layer. © 2008 ICQR. 2018-09-10T03:42:28Z 2018-09-10T03:42:28Z 2008-01-01 Conference Proceeding 2-s2.0-84907004006 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84907004006&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/60433
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Engineering
spellingShingle Engineering
A. Puttarach
N. Chakpitak
T. Kasirawat
C. Pongsriwat
Ground layer depth and the effect of GPR
description This paper presents a substation grounding grid analysis with the variation of soil layer depth. The grounding grid system of a practical 22 kV substation, in which the ground grid is made from copper, is calculated by virtue of the CDEGS software. The study, supported by Provincial Electricity Authority (PEA), Thailand, is based on grounding grid system of Royal Flora RATCHAPHRUEK substation. The supporting soil resistivity data has been obtained from field tests at the substation. The result shows that soil resistivity was interpreted to two-layer soil structure with low resistivity top layer and high resistivity bottom layer. The studied ground grid system is installed with constant 3 m ground rods. When the ground layer depth of the grid is increased, it directly affects to reduce the value of Ground Potential Rise (GPR). On the other hand, with the same grid configuration buried in the high resistivities bottom layer, its GPR is not reduced, that is, the more layer depth of high resistivities bottom layer, the more value of GPR. In addition, the grid with the different ground rods length also gives the different results. GPR is continuously reduced when the rod length is lengthened even though the bottom layer resistivity is higher than the top layer. © 2008 ICQR.
format Conference Proceeding
author A. Puttarach
N. Chakpitak
T. Kasirawat
C. Pongsriwat
author_facet A. Puttarach
N. Chakpitak
T. Kasirawat
C. Pongsriwat
author_sort A. Puttarach
title Ground layer depth and the effect of GPR
title_short Ground layer depth and the effect of GPR
title_full Ground layer depth and the effect of GPR
title_fullStr Ground layer depth and the effect of GPR
title_full_unstemmed Ground layer depth and the effect of GPR
title_sort ground layer depth and the effect of gpr
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84907004006&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/60433
_version_ 1681425434925858816