NDLI: Safety Performance of Large Grounding Grid With Fault Current Injected from Multiple Grounding Points

Content Provider	IEEE Xplore Digital Library
Author	Bo Zhang Jinliang He Yukuan Jiang
Copyright Year	1972
Abstract	Due to the overhead ground wires of transmission lines or the transformer's neutral point connected to a substation grounding grid, it looks like that there are many currents injected into or drawn out of the grounding grid from different grounding points when fault occurs. As the grounding grid is becoming larger and larger in area, the potential difference within the grounding grid may become obvious, and the assumption that the grounding points can be regarded as one point may not be suitable. This paper proposes a method to analyze the non-equipotential grounding grids with the fault current injected from multiple grounding points due to the overhead ground wires of transmission lines or the transformer's grounded neutral point. With the method, the influences of the grid area, soil resistivity, material of the grid conductor, and relative position of the grounding points on the performance of the grounding grid are thoroughly analyzed.
Sponsorship	IEEE Industry Applications Society
Starting Page	5116
Ending Page	5122
Page Count	7
File Size	1887325
File Format	PDF
ISSN	00939994
Volume Number	51
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Grounding Electric potential Conductivity Wires Soil Fault currents Conductors substations electrical safety fault currents grounding numerical models
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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Influence of Potential Difference Within Large Grounding Grid on Fault Current Division Factor

Evaluation of the Grounding Resistance of Conductors Buried in Steplike Terrain

Experimental and Numerical Study of Division Factors of Fault Current and Measuring Current Due to Ground Wires of Transmission Lines

Substation Grounding Transfer of Potential Case Studies

Safe Utilization of Existing Grounding Systems for Expansions and Upgrades of Substations

Determination of Maximum Substation Grounding System Fault Current Using Graphical Analysis

Analysis of Grounding Systems Including Freely Oriented Plates of Arbitrary Shape in Multilayer Soils

Numerical Modeling of Grounding Systems for Aboveground and Underground Substations

A practical approach for computation of grid current

Safety Performance of Large Grounding Grid With Fault Current Injected from Multiple Grounding Points

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Influence of Potential Difference Within Large Grounding Grid on Fault Current Division Factor

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Substation Grounding Transfer of Potential Case Studies

Safe Utilization of Existing Grounding Systems for Expansions and Upgrades of Substations

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