Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1997.07c
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- Pages.807-812
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- 1997
Measurement and Analysis of Earth Resistivity for the Substation Grounding Design
변전소 접지설계를 위한 대지고유저항의 측정과 해석
Abstract
For an equivalent uniform soil model to multiple-layered soil structure, ground depth, which is used in the calculation of equivalent resistivity, should be varied according to the size of grounding area. In case of 150 kV substation grounding design, 15 m of ground depth has been used and 25 m for 345 kV, But applying these ground depths can lead to errors in grounding resistance calculation, and these errors are coming from the poor representation of those depths to real soil resistivities. In this paper, the soil resistivity measurement techniques by Wenner method and grounding resistance calculation results by computer simulation were presented. Case studies contain the area from 3,000 to
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