`Decoupled method´ for studying large interconnected grounding systems using microcomputers. II. Utilization on Itaipu ground system and complementary aspects

Author

Sobral, S.T. ; Fleury, Vasco G P ; Villalba, J.R. ; Mukhedkar, D.

Author_Institution

IESA-Int. de Eng. SA, Rio de Janeiro, Brazil

Volume

3

Issue

4

fYear

1988

fDate

10/1/1988 12:00:00 AM

Firstpage

1545

Lastpage

1552

Abstract

For pt.I see ibid., vol.3, no.4, p.1536-44 (1988). The decoupled method described in part I is used to study the important facilities of the ground system of Brazil´s Itaipu generating complex (13000 MW), including four large nearby substations, interconnected by the aluminium-cable steel-reinforced (ACSR) ground-wires of several 500 kV and 220 kV transmission lines. Of paramount importance was the reduction of ground potential obtained by utilizing ACSR ground-wires. A theoretical justification is presented for the decoupling technique used. It is shown that the subdivision of the fault current into components (self-neutralized and nonneutralized) together with the concepts of virtual circuit and real circuit used in the method are powerful analytical tools for dealing with the design and performance of ground systems

Keywords

earthing; microcomputer applications; power system analysis computing; power system protection; substations; 13000 MW; 220 kV; 500 kV; ACSR; Brazil; decoupled method; design; earthing; fault current; ground-wires; interconnected grounding systems; microcomputers; performance; power system analysis computing; power system protection; substations; transmission lines; Coupling circuits; Current measurement; Grounding; Integrated circuit interconnections; Magnetic circuits; Microcomputers; Power generation; Power system interconnection; Substation protection; Underground power cables;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.193954

Filename

193954