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Modelling, Control Design and Analysis of VSC Based HVDC Transmission Systems

Padiyar, KR and Prabhu, Nagesh (2004) Modelling, Control Design and Analysis of VSC Based HVDC Transmission Systems. In: 2004 International Conference on Power System Technology-POWERCON, 21-24 November, Singapore, Vol.1, 774 -779.


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The development of power semiconductors, specially IGBTs has led to the small power HVDC transmission based on voltage source converters (VSCs). The VSC based HVDC transmission system mainly consists of two converter stations connected by a dc cable. This paper presents the modelling and control design of VSC based HVDC which uses twelve pulse three level converter topology. The reactive current injected by individual VSCs can be maintained constant or controlled to regulate converter bus voltage constant. While one VSC regulates the dc bus voltage the other controls the power flow in the dc link. Each VSC can have up to 4 controllers depending on the operating mode. The controller structure adopted for power controller is of PID type and all other controllers are of PI type. Each operating mode requires proper tuning of controller gains in order to achieve satisfactory system performance. This paper discusses a systematic approach for parameter optimization in selecting controller gains of VSC based HVDC. The analysis of VSC based HVDC is carried using both D-Q model (neglecting harmonics in the output voltages of VSC) and three phase detailed model of VSC using switching functions. While the eigenvalue analysis and controller design is based on the D-Q model, the transient simulation considers both models. The analysis considers different operating modes of the converters.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: �©1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Voltage Source Convertes(VSC);HVDC;Parameter Optimization;Eigenvalue analysis;Transient simulation
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 01 Dec 2005
Last Modified: 19 Sep 2010 04:21
URI: http://eprints.iisc.ac.in/id/eprint/4242

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