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Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions

FYP 2 SEM 2 2019/2020

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Main Author: Muhamad Saufi Bin Hussain
Format:
Language:English
Published: 2023
Subjects:
Lightning
Power Frequency
Soil Resistivity
Touch And Step Voltages
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spelling my.uniten.dspace-213872023-05-04T15:41:55Z Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions Muhamad Saufi Bin Hussain Lightning Power Frequency Soil Resistivity Touch And Step Voltages FYP 2 SEM 2 2019/2020 Designing a grounding system for the distribution substation could be very difficult due to many factors that need to be considered especially when there is a fault occur at that particular grid. While a fault may be from within the system itself or from natural phenomena like lightning events. This fault current strikes may cause a total failure of the substation if it is not given extra safety measure. Thus, proper grounding system exist to yield the pathway for high fault current during transient event or even at normal condition to dissipate into the earth without damaging electrical equipment in the substation. Besides, different soil condition can be a major determinant in designing a grounding system. Therefore, this project evaluates the substation grounding system based on lightning event under different cases of soil conditions which comes in uniform and 2-layered soil. The simulation of the grid design was done by using 3 modules from the Current Distribution Electromagnetic Field Grounding Soil Structure Analysis Software (CDEGS) which is MALT, FFTSES, and HIFREQ. The grounding grids were evaluated by examine its individual grid resistance and impedance, GPR, touch voltage and step voltage. The influence of different soil models and lightning strikes on the grounding resistance, GPR at the surface, touch and step voltages are clearly presented in this project. In addition to that, these grid design evaluations were compared between under lightning transient and normal power frequency condition. Results indicated a major increase in grid resistance, touch and step voltages with respect to increasing soil resistivity in uniform model under power frequency condition as well as under lightning transient. In addition to that, results show that increase in size of the grid could decrease the touch and step voltages. All characteristic values for safety assessment are provided and plotted in 3D and spot-2D presentation. The results were then used to provide recommendations on the optimum substation grounding grid design based on the factors that were discussed. 2023-05-03T16:45:12Z 2023-05-03T16:45:12Z 2020-02 https://irepository.uniten.edu.my/handle/123456789/21387 en application/pdf
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
language English
topic Lightning
Power Frequency
Soil Resistivity
Touch And Step Voltages
spellingShingle Lightning
Power Frequency
Soil Resistivity
Touch And Step Voltages
Muhamad Saufi Bin Hussain
Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions
description FYP 2 SEM 2 2019/2020
format
author Muhamad Saufi Bin Hussain
author_facet Muhamad Saufi Bin Hussain
author_sort Muhamad Saufi Bin Hussain
title Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions
title_short Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions
title_full Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions
title_fullStr Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions
title_full_unstemmed Fundamental Aspects Determination Of Substation Grounding Characteristics Under Transient Phenomena For Different Soil Conditions
title_sort fundamental aspects determination of substation grounding characteristics under transient phenomena for different soil conditions
publishDate 2023
_version_ 1806424494802206720
score 13.222552

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