Safety design planning of ground grid for outdoor substations in MEA's power distribution system

This paper analyzes the performance of a ground-ing system made of copper conductors and signicantly influenced by soil resistivity. The grounding performance is evaluated in terms of ground potential rise (GPR), touch voltage and step voltage caused by a short circuit that generates a flow of large...

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Main Authors: Att Phayomhom, Somporn Sirisumrannukul, Tirapong Kasirawat, Arwut Puttarach
Format: Journal
Published: 2018
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Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80055068645&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/49893
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-498932018-09-04T04:21:20Z Safety design planning of ground grid for outdoor substations in MEA's power distribution system Att Phayomhom Somporn Sirisumrannukul Tirapong Kasirawat Arwut Puttarach Computer Science Engineering This paper analyzes the performance of a ground-ing system made of copper conductors and signicantly influenced by soil resistivity. The grounding performance is evaluated in terms of ground potential rise (GPR), touch voltage and step voltage caused by a short circuit that generates a flow of large cur-rents in the aboveground structures and grounding system and dissipates in the soil. These currents may cause damage to substation equipment and may be dangerous to personnel working nearby. Safety design planning for step and touch voltages for the existing fault level and future fault levels are extensively investigated for utility applications where personnel hazards may exist. Modelling and simulation is carried out on the Current Distribution Electro-magnetic interference Grounding and Soil structure (CDEGS) program. The safety design planning is illustrated by a practical case of ground grid design for the 69/12-24 kV, outdoor-type Bangkrachao sub-station of Metropolitan Electricity Authority (MEA) with economic analysis. An effective solution to improve the performance of the substation grounding is also suggested. 2018-09-04T04:19:49Z 2018-09-04T04:19:49Z 2011-02-01 Journal 16859545 2-s2.0-80055068645 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80055068645&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/49893
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Computer Science
Engineering
spellingShingle Computer Science
Engineering
Att Phayomhom
Somporn Sirisumrannukul
Tirapong Kasirawat
Arwut Puttarach
Safety design planning of ground grid for outdoor substations in MEA's power distribution system
description This paper analyzes the performance of a ground-ing system made of copper conductors and signicantly influenced by soil resistivity. The grounding performance is evaluated in terms of ground potential rise (GPR), touch voltage and step voltage caused by a short circuit that generates a flow of large cur-rents in the aboveground structures and grounding system and dissipates in the soil. These currents may cause damage to substation equipment and may be dangerous to personnel working nearby. Safety design planning for step and touch voltages for the existing fault level and future fault levels are extensively investigated for utility applications where personnel hazards may exist. Modelling and simulation is carried out on the Current Distribution Electro-magnetic interference Grounding and Soil structure (CDEGS) program. The safety design planning is illustrated by a practical case of ground grid design for the 69/12-24 kV, outdoor-type Bangkrachao sub-station of Metropolitan Electricity Authority (MEA) with economic analysis. An effective solution to improve the performance of the substation grounding is also suggested.
format Journal
author Att Phayomhom
Somporn Sirisumrannukul
Tirapong Kasirawat
Arwut Puttarach
author_facet Att Phayomhom
Somporn Sirisumrannukul
Tirapong Kasirawat
Arwut Puttarach
author_sort Att Phayomhom
title Safety design planning of ground grid for outdoor substations in MEA's power distribution system
title_short Safety design planning of ground grid for outdoor substations in MEA's power distribution system
title_full Safety design planning of ground grid for outdoor substations in MEA's power distribution system
title_fullStr Safety design planning of ground grid for outdoor substations in MEA's power distribution system
title_full_unstemmed Safety design planning of ground grid for outdoor substations in MEA's power distribution system
title_sort safety design planning of ground grid for outdoor substations in mea's power distribution system
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80055068645&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/49893
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