Grounding measurements at the Itaipu generating complex using the ''extended Eleck method''

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · IEEE Trans. Power Del.; (United States)

DOI:https://doi.org/10.1109/61.193955· OSTI ID:6537994

Sobral, S T ^[1]; Peixoto, C A ^[2]; Fernandes, D ^[3]; Mukhedkar, D ^[4]

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1. IESA - Internacional de Engenharia S.A. Rio de Janeiro (BR)
2. ITAIPU BINACIONAL Rio de Janeiro (BR)
3. FURNAS - Centrais Eletricas, S.A. Rio de Janeiro (BR)
4. Ecole Polytechnique, Montreal (CA)

This paper presents a description of the measurements carried out at the interconnected grounding system of the 3 main substations of the Itaipu Generating Complex including: ground mat resistances, ground impedances seen from each substation, ground potential rise (GPR) and mesh potential. It is commented in the paper that the small magnitude of these ground system parameters as well as the interconnection between several nearby ground mats through the ground-wires of the 500 kV and 220 kV lines recommended the utilization of the powerful and well-known set of measurement procedures introduced by A. Eleck. The Eleck method includes: noise elimination circuits and calculation procedures: ''position'' ad ''voltmeter'' correction factors etc. It is shown, however, that even using the sophisticated Eleck method, the initial results obtained were around 2 times smaller than the final corrected values. This problem can occur every time the phases of a transmission line with ACSR ground-wires are used as part of the current measuring circuit interconnecting the substation ground mat with a remote current electrode (installed within 3 to 5 kilometers from the substation, as recommended by modern technology).

• OSTI ID: 6537994
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. 3:4; ISSN ITPDE
• Country of Publication: United States
• Language: English

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