Stability analysis of HVDC control loops

Author

Jovcic, D. ; Pahalawaththa, N. ; Zavahir, M.

Author_Institution

Dept. of Electr. & Electron. Eng., Auckland Univ., New Zealand

Volume

146

Issue

2

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

143

Lastpage

148

Abstract

The influence of HVDC control loops on the dynamic stability of an overall HVDC-HVAC system is discussed. The eigenvalue decomposition is used for the analysis of system stability in the frequency range below 100 Hz. The use of direct current and fast power feedback at the rectifier side of the system is analysed and compared. It is found that DC feedback actually deteriorates the system stability around the first harmonic. At the inverter side, as the commonly used control strategies, constant beta control is analysed and compared with gamma minimum control, direct current feedback and direct voltage feedback. Reactive current feedback and CCCM control methods are also analysed as suggested alternative control techniques. Reactive current feedback is found to be the best control strategy from the stability point of view. The test system used is assumed to operate with weak and very weak AC systems at the inverter side

Keywords

HVDC power transmission; control system analysis; eigenvalues and eigenfunctions; power system dynamic stability; power system interconnection; power transmission control; CCCM control methods; DC feedback; HVDC control loops; HVDC-HVAC power system; constant beta control; control simulation; control strategy; direct current; direct current feedback; direct voltage feedback; dynamic stability analysis; eigenvalue decomposition; fast power feedback; first harmonic; gamma minimum control; inverter side; reactive current feedback; rectifier side;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:19990048

Filename

768647