Title :
A simplified method for calculating the substation grounding grid resistance
Author :
Chow, Y.L. ; Salama, M.M.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
fDate :
4/1/1994 12:00:00 AM
Abstract :
A simple and accurate formula for calculating the grounding grid resistance is proposed in this paper. This method is based on a theoretical manipulation of the numerical moment method and of the current image. The formula is dependent on the substation grounding grid design, such as grid depth, grid size, number of meshes, grid-conductor diameter, etc. A comparison study is performed to check the accuracy of the proposed formula with respect to six different formulas and methods in the literature. An excellent agreement was found between the results of this formula and the results of a sophisticated computerized method
Keywords :
earth electrodes; electric resistance; substations; computerized method; current image; grid depth; grid size; grid-conductor diameter; grounding grid resistance calculation; meshes; numerical moment method; substation grounding grid; Capacitance; Conductors; Electric resistance; Equations; Grid computing; Grounding; Moment methods; Power engineering computing; Soil; Substations;
Journal_Title :
Power Delivery, IEEE Transactions on
