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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/8953

Title: Output feedback SSR damping controller design based on modular discrete-time dynamic model of TCSC
Authors: JOSHI, SR
CHERIYAN, EP
KULKARNI, AM
Keywords: subsynchronous oscillations
thyristor
resonance
capacitor
stability
Issue Date: 2009
Publisher: INST ENGINEERING TECHNOLOGY-IET
Citation: IET GENERATION TRANSMISSION & DISTRIBUTION, 3(6), 561-573
Abstract: This paper presents the use of a modular, sample invariant, six samples per cycle, discrete-time model of a thyristor controlled series capacitor (TCSC) for output feedback-based subsynchronous resonance (SSR) damping controller (SSDC) design. An SSDC is used to alleviate the instability of torsional modes caused by external fixed capacitors used in conjunction with a TCSC. It is found that damping torque analysis-based design of an SSDC using a non-local signal like generator slip is straightforward and the resulting SSDC has a simple compensator structure. On the other hand, the residues and pole-zero configuration with the line current magnitude as a feedback signal are such that it is relatively more difficult to obtain a robust design, especially if several subsynchronous torsional modes are present. Eigenvalue analysis and digital simulation studies indicate that the TCSC model can accurately predict the behaviour of a TCSC with and without a damping controller.
URI: http://dx.doi.org/10.1049/iet-gtd.2008.0439
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8953
http://hdl.handle.net/10054/8953
ISSN: 1751-8687
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