Title :
A fast and accurate analysis of grounding resistance of a driven rodbed in a two-layer soil
Author :
Elsherbiny, M.M. ; Chow, Y.L. ; Salama, M.M.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
fDate :
4/1/1996 12:00:00 AM
Abstract :
A moment method of the Galerkin (variational) approach is applied to analyze the grounding resistances of driven rodbed of various configurations. Using this approach the resistance of a rodbed of N rods in two-layer soil requires only a matrix size of 2N×2N (two segments for each rod). The error in the calculated resistance is less than 4% compared to the resistance calculated by point matching moment method of large number of segmentation for each rod. The efficiency due to a small matrix with high accuracy allows an extensive parametric analysis of the rodbed. The study shows that a precise placement of the rods is not necessary to maintain a given resistance
Keywords :
Galerkin method; earthing; electric resistance; matrix algebra; method of moments; power system protection; soil; Galerkin moment method; accuracy; driven rodbed; grounding resistance; matrix size; parametric analysis; point matching moment method; power systems; segmentation; two-layer soil; Current density; Earth; Electric resistance; Electrical resistance measurement; Grounding; Image segmentation; Moment methods; Performance evaluation; Power engineering computing; Soil; Soil measurements;
Journal_Title :
Power Delivery, IEEE Transactions on
