Control block diagram representation of an HVDC system for sub-synchronous frequency interaction studies

Author

Karawita, Chandana ; Annakkage, U.D.

Author_Institution

Transgrid Solutions Inc., Winnipeg, MB, Canada

fYear

2010

fDate

19-21 Oct. 2010

Firstpage

1

Lastpage

5

Abstract

A linearized model of an HVDC system is presented in a control block diagram form. The converter models (rectifier and inverter), DC transmission system, phase lock oscillators (PLOs) and the HVDC controllers are included. The control block diagram model of HVDC system simplifies, in understanding and modelling, the complex operation of the HVDC system. The model can be used in small signal stability assessment to analyze subsynchronous frequency HVDC interactions such as generator-turbine torsional interactions. Furthermore, the model can be easily implemented in a software environment such as Simulink for response analysis, control tuning and other educational purposes.

Keywords

HVDC power convertors; HVDC power transmission; phase locked oscillators; power transmission control; subsynchronous resonance; synchronous generators; turbines; DC transmission system; HVDC controllers; control block diagram representation; control tuning; converter models; generator-turbine torsional interaction; phase lock oscillators; signal stability assessment; software environment; subsynchronous frequency HVDC interaction; HVDC; Subsynchronous interactions;

fLanguage

English

Publisher

iet

Conference_Titel

AC and DC Power Transmission, 2010. ACDC. 9th IET International Conference on

Conference_Location

London

Type

conf

DOI

10.1049/cp.2010.0998

Filename

5728030