Voltage stability assessment for real-time operation

Author

Prada, R.B. ; Palomino, E. G C ; dos Santos, J.O.R. ; Bianco, A. ; Pilotto, L.A.S.

Author_Institution

Dept. of Electr. Eng., Catholic Univ. of Rio de Janeiro, Brazil

Volume

149

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

175

Lastpage

181

Abstract

Network voltage stability is represented by nodal conditions associated with the maximum active and reactive power flow that can be transmitted from generators to loads. An analytical assessment tool is derived, based on a simple but sound mathematical background, modelling a straightforward physical characterisation of the phenomena. Comprehensive and meaningful indices are introduced. They indicate the MVA margin to the maximum, the region of operation, the relative importance among buses, the loading ranking of the buses, the sensitivity to control actions, and a measure of difficulty for power transmission. Numerical results are presented for the Itaipu bulk transmission network in the S/SE of Brazil immediately before a voltage stability blackout in April 1997. Computational efficiency is no burden for real time operation including contingency analysis

Keywords

busbars; power system dynamic stability; power transmission; reactive power; Brazil; Itaipu bulk transmission network; MVA margin; buses; contingency analysis; control actions sensitivity; loading ranking; maximum active power flow; maximum reactive power flow; network voltage stability; nodal conditions; power transmission; real-time operation; voltage stability blackout;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:20020282

Filename

998014