Interaction between AVR reactive power control and high power ac-dc Converter Control as possible cause of instability

Author

Aguero, J.L. ; Arnera, P.L. ; Lastra, R.E.B. ; Molina, R. ; Biteznik, C.E. ; Barbero, S.

Author_Institution

Fac. de Ing., Univ. Nac. de La Plata, La Plata, Argentina

fYear

2012

fDate

22-26 July 2012

Firstpage

1

Lastpage

7

Abstract

Two oscillatory episodes took place in the Argentinean power system at 22:20 and 22:50, June 7^th, 2008. The first one started when a 40 MVAr capacitors bank was disconnected and the second one started when a 500 kV line was disconnected. Both oscillatory episodes produced great variation of active and reactive power in several 330 kV and 500 kV power system nodes. At first sight, these oscillations seemed inter-area electromechanical oscillations, but carried out studies suggest that this oscillatory behavior could be a consequence of interaction between Reactive Power Control of generators and the ac-dc Converter Control of high power loads.

Keywords

AC-DC power convertors; electric generators; machine control; power capacitors; power system interconnection; power system stability; reactive power control; AVR reactive power control; Argentinean power system; capacitor bank; generators; high power AC-DC converter control; high power loads; inter area electromechanical oscillation; oscillatory episodes; voltage 330 kV; voltage 500 kV; Inductors; Load modeling; Oscillators; Power system stability; Reactive power control; Substations; Thyristors; AC-DC Converter Control; Automatic Voltage Control; Modeling; Power System Dynamic Stability; Power System Stabilizer; Reactive Power Control; Simulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting, 2012 IEEE

Conference_Location

San Diego, CA

ISSN

1944-9925

Print_ISBN

978-1-4673-2727-5

Electronic_ISBN

1944-9925

Type

conf

DOI

10.1109/PESGM.2012.6345139

Filename

6345139