Title :
Effects of inductive coupling between leads in ground impedance measurements using the fall-of-potential method
Author :
Ma, J. ; Dawalibi, F.P.
Author_Institution :
Safe Eng. Services & Technol., Montreal, Que., Canada
Abstract :
Ground impedance measurements in various soil structures using the fall-of-potential method are modeled, taking into account the inductive coupling between current and potential leads. The variation of the inductive coupling with the separation distance between the current and potential leads, operating frequency and grounding grid size, is analyzed for uniform and multilayer soils. Numerical results are presented and compared. The analysis quantifies the inductive coupling between current and potential leads for typical separation distances between the leads. Coupling levels presented in this paper can be used as a reference to estimate possible errors in ground impedance measurements
Keywords :
earthing; electric impedance; electric impedance measurement; power system measurement; power system protection; soil; fall-of-potential method; ground impedance measurements; grounding grid size; leads inductive coupling; leads separation distance; multilayer soils; operating frequency; power network grounding systems; soil structures; uniform soils; Current measurement; Electrical resistance measurement; Electrodes; Frequency; Ground penetrating radar; Grounding; Impedance measurement; Noise measurement; Probes; Soil measurements;
Conference_Titel :
Transmission and Distribution Conference, 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5515-6
DOI :
10.1109/TDC.1999.755359
