WSEAS Transactions on Power Systems
Print ISSN: 1109-9445, E-ISSN: 2415-1513
Volume 11, 2016
Research on the Numerical Accuracy of Equipotential Ground Model Based on Method of Moment
Authors: , , , , ,
Abstract: In numerical calculations of grounding grid based on the method of moment, accurately calculation of the resistance matrix is an important step. The direct numerical integration method, Heppe’s method and Kouteynikoff’s method have the most broad influence in the previous publications, and the accuracy of these algorithms require further evaluation. A software for simulating grounding systems has been developed based on the method of moments in this paper, it implements the above several important algorithms. Under the assumption of uniform soil and ignoring the conductor impedance, the calculation results of the above methods and CDEGS are compared, and sources of error are analyzed. Furthermore, since the grounding electrode need to be cut into small segments properly when using the method of moment, the effect of the conductor’s different divisions for accuracy is analyzed quantitatively, and the rule of the calculation accuracy of grounding resistance with the change of segment numbers is obtained. After comparison of the above methods in the case study, theoretical analysis and program test reveal the theoretical flaw of the Kouteynikoff’s method.
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Keywords: Grounding grid, numerical calculation, method of moment, Hepe’s method, Kouteynikoff’s method, CDEGS, Numerical Accuracy
Pages: 52-57
WSEAS Transactions on Power Systems, ISSN / E-ISSN: 1109-9445 / 2415-1513, Volume 11, 2016, Art. #7