Point of collapse methods applied to AC/DC power systems

Author

Cañizares, Claudio A. ; Alvarado, Fernando L. ; DeMarco, Christopher L. ; Dobson, Ian ; Long, Willis F.

Author_Institution

Wisconsin Univ., Madison, WI, USA

Volume

7

Issue

2

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

673

Lastpage

683

Abstract

The authors describe an extension of the point of collapse method developed for studies of AC systems to the determination of saddle-node bifurcations in power systems including high voltage direct current (HVDC) transmission. Bus voltage profiles are illustrated for an AC/DC test system. They significantly differ from the profiles of pure AC systems for typical system models. In particular, voltage dependent current order limits are shown to affect the voltage profiles and the loadability margin of the system. It is also shown that Hopf bifurcations, which are possible in purely AC lossless systems with second-order generator models, become plausible when the dynamics for the HVDC system are included

Keywords

DC power transmission; eigenvalues and eigenfunctions; electrical faults; load (electric); matrix algebra; power system interconnection; AC/DC power systems; HVDC; Hopf bifurcations; buses; eigenvalues; loadability margin; matrices; point of collapse; power system interconnection; saddle-node bifurcations; voltage dependent current order limits; voltage profiles; Bifurcation; Equations; HVDC transmission; IEEE members; Power generation; Power system modeling; Power system transients; Power systems; Stability; Voltage;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.141773

Filename

141773