Subsynchronous torsional behaviour of a hydraulic turbine-generator unit connected to a HVDC system

Authors

Yin Chin Choo, University of WollongongFollow
Ashish Agalgaonkar, University of WollongongFollow
Kashem Muttaqi, University of WollongongFollow
Sarath Perera, University of WollongongFollow
Michael Negnevitsky, University of TasmaniaFollow

RIS ID

25883

Publication Details

Y. Choo, A. P. Agalgaonkar, K. Muttaqi, S. Perera & M. Negnevitsky, "Subsynchronous torsional behaviour of a hydraulic turbine-generator unit connected to a HVDC system," in AUPEC 2008: Australasian Universities Power Engineering Conference, 2008, pp. 1-6.

Abstract

Torsional interaction is an important phenomenon of concern when a turbine-generator (TG) unit is connected to a series compensated line or a high voltage direct current (HVDC) system. The subsynchronous torsional interaction (SSTI) may have significant impact on the hydraulic system due to the negative damping introduced by HVDC converter controls. This paper investigates the SSTI behaviour of hydro TG units interconnected with a HVDC system for a varying generator-to-turbine inertia ratio. Case studies are carried out by changing the value of firing angle, applying a three-phase fault at the inverter bus and line switching at the rectifier ac system.

Link to publisher version (URL)

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