Auas SVC, performance verification by RTDS and field tests

Author

Boshoff, S. ; van Dyk, C. ; Becker, L. ; Halonen, M. ; Rudin, S. ; Lidholm, J. ; Maguire, T.

Author_Institution

S Boshoff Consulting, South Africa

fYear

2001

fDate

28-30 Nov. 2001

Firstpage

199

Lastpage

204

Abstract

The new 400 kV interconnection between Namibia and South Africa was successfully commissioned in the last quarter of 2000. The 890 km single circuit 400 kV AC transmission line interconnects the two systems, ESKOM and NamPower, at the Aries substation near Kenhardt in South Africa and the Auas substation near Windhoek in Namibia. With the new interconnection, the NamPower system is strengthened, but the new 400 kV line is also very long with a large charging capacitance which aggravates the inherent problems in the NamPower system; namely voltage stability and near 50 Hz resonance. The charging capacitance shifts the existing parallel resonance very close to 50 Hz and makes the network more voltage sensitive during system transients such as 400 kV line energisation or recovery after clearing of line faults. The authors describe how the SVC performance of this system has been verified by RTDS and field tests.

Keywords

control system analysis computing; flexible AC transmission systems; power system analysis computing; power system control; power system interconnection; power system measurement; reactive power control; static VAr compensators; substation insulation; 400 kV; 50 Hz; 890 km; AC transmission line; NamPower system; Namibia; SVC; South Africa; charging capacitance; computer simulation; line energisation; line fault clearing; parallel resonance; performance tests; power system interconnection; resonance; substation; system transients; voltage stability;

fLanguage

English

Publisher

iet

Conference_Titel

AC-DC Power Transmission, 2001. Seventh International Conference on (Conf. Publ. No. 485)

ISSN

0537-9989

Print_ISBN

0-85296-745-4

Type

conf

DOI

10.1049/cp:20010542

Filename

988409