Measurement of Resistance of a Grounding Grid Model Using Magnetic Field Sensors

Author

Davalbhakta, Aneesh A. ; Mahajan, Satish M.

Author_Institution

Tennessee Tech Univ., Cookeville

fYear

2008

fDate

16-18 March 2008

Firstpage

174

Lastpage

177

Abstract

Precise measurement of resistance of a grounding grid is a fundamental factor in the protection of power systems. There are number of ground wires connected to the grid. ";Fall of potential"; method used for the measurement of a grid resistance gives incorrect measurement if part of the injected current shunted by ground wires is not considered. In this paper, resistance of a model of grounding grid system was measured using a method called "Single Point System" (SPS). SPS is based on the measurement of current using magnetic field sensors. Sensors used were Giant Magnetoresistive (GMR) sensors. SPS can measure grid resistance even with ground wires connected to the grid. Results obtained for a laboratory model gave error within 5% in the measurement of grounding grid resistance.

Keywords

earthing; giant magnetoresistance; magnetic field measurement; giant magnetoresistive sensors; grounding grid system; magnetic field sensors; resistance measurement; single point system; Current measurement; Electrical resistance measurement; Giant magnetoresistance; Grounding; Magnetic field measurement; Magnetic sensors; Power measurement; Power system modeling; Power system protection; Wires; GMR; Grid Resistance; Grounding Grid; Grounding Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

System Theory, 2008. SSST 2008. 40th Southeastern Symposium on

Conference_Location

New Orleans, LA

ISSN

0094-2898

Print_ISBN

978-1-4244-1806-0

Electronic_ISBN

0094-2898

Type

conf

DOI

10.1109/SSST.2008.4480214

Filename

4480214