Analysis of Grounding Resistance and Soil Resistivity Using 2D Modeling Method

2016 ◽  
Author(s):  
Chang-Jin Boo ◽  
Keyword(s):  
Modeling Method ◽  
Soil Resistivity ◽  
2D Modeling ◽  
Grounding Resistance

Preparation and Long-Term Stability Study of Steel Fiber/Graphite Conductive Concrete

2016 ◽  
Vol 680 ◽  
pp. 361-364 ◽  
Author(s):  
Jun Du ◽  
Cheng Tang ◽  
Bo Jia ◽  
De Zhang ◽  
Qiang Miao
Keyword(s):  
Corrosion Resistance ◽  
Steel Fiber ◽  
Stability Study ◽  
Soil Resistivity ◽  
Grounding Resistance ◽  
Term Stability ◽  
Long Term Stability ◽  
Conductive Fillers ◽  
The Common

The steel fiber/graphite conductive concrete is applied in power system grounding. In high soil resistivity regions, the common methods for reducing the grounding resistance are not practical. It is difficult for grounding resistance of substations to meet the requirements of working earthing and safety earthing. In order to solve this problem, a steel fiber/graphite conductive concrete is developed in this paper. Steel fiber and graphite are added as conductive fillers. The long-term stability of the steel fiber/graphite conductive concrete is studied. The experiment results show that steel fiber/graphite conductive concrete not only maintains excellent conductivity, but also has good mechanical strength and corrosion resistance in 300 days.

Correlation Analysis between Grounding Resistance and Diurnal Variations of Upper Soil Resistivity during March 2010 in Balozhi, Latvia

2010 ◽  
Vol 27 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Marina Kizhlo ◽  
Arvids Kanbergs ◽  
Mihails Kizhlo
Keyword(s):  
Correlation Analysis ◽  
Meteorological Factors ◽  
Soil Layer ◽  
Considerable Effect ◽  
Diurnal Variations ◽  
Electrical Safety ◽  
Soil Resistivity ◽  
Grounding System ◽  
Grounding Resistance ◽  
Local Topography

Correlation Analysis between Grounding Resistance and Diurnal Variations of Upper Soil Resistivity during March 2010 in Balozhi, LatviaThe accurate measurement of soil resistivity and grounding system resistance is fundamental to electrical safety. However, geological and meteorological factors can have a considerable effect on the accuracy of conventional measurements and the validity of the measurement methods. This paper examines some aspects of grounding measurements and grounding system performance in the context of both geological and meteorological effects.We are reporting the results of grounding measurements using the 3-point method with ground resistivity tester type M416. The measurements were conducted during selected period from 2010 March 1 to March 31 in Balozhi, Latvia. We also noted that the resistivity of the upper layer significantly varied from a point to another, reflecting difference in water content in the upper soil layer due to local topography and other parameters.

Soil Resistivity Evaluation and Grounding System Resistance

2018 ◽  
pp. 1-37
Keyword(s):  
Resistivity Measurement ◽  
Potential Method ◽  
Measurement Procedure ◽  
Resistance Testing ◽  
Soil Resistivity ◽  
Factors Affecting ◽  
Grounding Resistance ◽  
Ground Resistance ◽  
Transmission Towers ◽  
Electrode Method

This chapter contains the factors affecting the soil resistivity and grounding resistance such as the soil moisture content, soil mineral content and soil temperature. It discusses the methods of measuring of soil resistivity and grounding resistance using Wenner method. Method to obtain the required samples for obtaining accurate site resistivity is presented. Soil resistivity measurement procedure is given in this chapter. The chapter contains three electrode method or fall-of-Potential method, dead earth method, and ground resistance testing existing systems using ‘Selective' Clamp-on-Measuring of high voltage transmission towers feet resistance. Methods of calculating the apparent soil resistivity of Multi-Layers, apparent soil resistivity of two layers and apparent soil resistivity of three layers are presented in this chapter.

scholarly journals Grounding Electrodes with Internal Resistance: Application to Feasibility Study of the Driven-Rod Method for Modeling the Soil Electrical Resistivity Profile

2021 ◽  
Vol 11 (11) ◽  
pp. 5032
Author(s):  
Gregorio Denche ◽  
Eduardo Faleiro ◽  
Gabriel Asensio ◽  
Jorge Moreno
Keyword(s):  
Inverse Problem ◽  
Great Influence ◽  
Internal Resistance ◽  
Soil Resistivity ◽  
Grounding Resistance ◽  
Resistivity Profile ◽  
Analytical Expressions ◽  
Determinant Factor ◽  
Soil Electrical Resistivity ◽  
Correct Estimate

The paper presents a model to include the internal resistance of the grounding electrodes in the calculation of its electrical features. The semi-analytical expressions for the calculation of the grounding resistance arising from the model are used to study the feasibility of the driven-rod method for the estimation of the soil resistivity profile since, unlike other methods, the internal resistance of the conductors can be of great influence for a correct estimate. From the grounding resistance profile an inverse problem based on the minimization of the quadratic differences between the resistance measured and that calculated from the model is posed. Several synthetic examples are used to assess the limitations of the method in conditions close to real situations. Finally, some real cases involving data measured in the field are analyzed. Whether in synthetic examples or in real soils it is found that the spatial frequency of the driven-rod resistance sampling is a determinant factor in order to study the feasibility of the driven–rod method.

scholarly journals Coupling effect in substation ground measurements

2012 ◽  
Vol 9 (3) ◽  
pp. 315-324 ◽  
Author(s):  
Alex Farber ◽  
Boris Katz
Keyword(s):  
Simple Formula ◽  
Coupling Effect ◽  
Inductive Coupling ◽  
Wire Length ◽  
Soil Resistivity ◽  
Grounding Resistance ◽  
Soil Structures

A method to measure ground impedance in various soil structures is described, which takes into account inductive coupling between current and potential wires. For this purpose, a family of coupling effect curves versus the potential wire length was calculated. It was found that these curves are not dependent on the current wire length and are practically identical to the same soil resistivity. The true resistance of the substation grounding is determined using received coupling effect curves, and a simple formula which subtracts the coupling effect from the measured substation grounding resistance. Practical comparative measurements were performed to validate the method.

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