Substation Grounding Grid Analysis with the Variation of Soil layer depth Method

Puttarach, A.; Chakpitak, Nopasit; Kasirawat, T.; Pongsriwat, C.

doi:10.1109/pct.2007.4538604

Cited by 23 publications

(11 citation statements)

References 7 publications

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“…In new FEM methods, modeling starts from beginning. In the first step, they assume that grounding resistance is such a parameter which does not depend on potential or current in the grid except frequency cases other from frequencies [6,7] (50Hz or 60Hz frequency of power). The second assumption is to consider the whole region as flat surface which is infinite.…”

Section: Finite Element Methodsmentioning

confidence: 99%

A Comparison of Ground Grid Mesh Design and Optimization for 500kv substation using IEEE 80-2000 and Finite Element Methods

Cheema¹,

Cheema²,

Bashir³

et al. 2015

ELELIJ

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Section: Finite Element Methodsmentioning

confidence: 99%

A Comparison of Ground Grid Mesh Design and Optimization for 500kv substation using IEEE 80-2000 and Finite Element Methods

Cheema¹,

Cheema²,

Bashir³

et al. 2015

ELELIJ

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“…The ground grid system is already laid and functioning therefore existing data is collected to analyze whether all important parameters are within the described limits [5,6].…”

Section: Overview Of Practical Datamentioning

confidence: 99%

“…It is necessary to have low resistance path for the dissipation of current. Therefore a low resistance ground grid mesh is installed to protect the equipment from damage [5,6]. In case of higher resistance, more voltage drop will occur in mesh ultimately resulting in rise of mesh potentials.…”

Section: Introductionmentioning

confidence: 99%

Design analysis and optimization of ground grid mesh of extra high voltage substation using an intelligent software

Aslam

Cheema

et al. 2014

2014 the 1st International Conference on Information Technology, Computer, and Electrical Engineering

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The 500KV substations are important for power system in Pakistan. They cover large area meeting the power requirement of whole power system. The ground grid system of substation has to be carefully analyzed in order to protect the grid, keep the system functional. A practical 500KV substation is chosen for this purpose i.e. RA WAT Grid Station. The grounding system of substation is studied in detail along with practical data collection for the purpose of analysis. It is important to mention about latest IEEE 81 2013 methods which have been adopted during data collection phase. The ETAP software version 12 is used for modeling and analysis of network. The Ground Grid System (GGS) module included in latest version of ETAP i.e. ETAP 12 is used for analysis. Firstly modeling is done in ETAP-12, afterwards analysis is performed on actual ground mesh using IEEE 80-2000 improved methods to evaluate step potential, ground potential rise, ground resistance, short term temperature rise of conductors Irods & touch potential. The shortcomings in existing grid mesh are highlighted and remedial actions are suggested to rectify the problems. The extension is planned in the substation regarding installation of new power transformer which will result to in rise of overall substation fault level. The increase in fault level is considered in one case study and possiblesolution is provided. A new ground mesh is also designed for this area which will serve as a model for future substations which will be designed in this particular area keeping in view essential parameters. A new ground mesh is also designed for 750KV substation, as it will be part of our national grid in near future as feasibility study is ongoing in NTDC Pakistan for the establishment of first 750KV substation in this area. The variation in ground grid resistance and various safety parameters with the change in ground grid mesh shape, depth and size is explained by the help of results obtained through Case studies.

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“…Step voltage is one of the important criterions for the safety of the person [12][13]. The maximum step voltage is assumed to occur over a distance of 1 meter diagonally outside the corner of the grid [1], [3].…”

Section: Step Voltagementioning

confidence: 99%

Grounding Grid Performance of Substation in Two Layer Soil - A Parametric Analysis

Unde¹,

Kushare²

2012

IJESET

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During ground faults, fault current flows in the ground which results in potential gradient and ground potential rise (GPR). The potential gradient affects the safety of operating person due to step and touch voltage and GPR affects the insulation of protective devices and control cables. The potential gradient and GPR are the functions of ground electrode geometry. In this paper, performance assessment and analysis of grounding grid is carried out for different types of grid electrodes with two layer soil model for both positive and negative reflection factor K. The simulation is carried out to evaluate grounding grid performance indices such as Ground

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Substation Grounding Grid Analysis with the Variation of Soil layer depth Method

Cited by 23 publications

References 7 publications

A Comparison of Ground Grid Mesh Design and Optimization for 500kv substation using IEEE 80-2000 and Finite Element Methods

A Comparison of Ground Grid Mesh Design and Optimization for 500kv substation using IEEE 80-2000 and Finite Element Methods

Design analysis and optimization of ground grid mesh of extra high voltage substation using an intelligent software

Grounding Grid Performance of Substation in Two Layer Soil - A Parametric Analysis

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