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Improved low-voltage-ride-through capability of fixedspeed wind turbines using decentralised control of STATCOM with energy storage system

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3 Author(s)
M. J. Hossain ; Griffith School of Engineering, Griffith University, Gold Coast, QLD-4222, Australia ; H. R. Pota ; R. A. Ramos

The design and implementation of a new control scheme for reactive power compensation, voltage regulation and transient stability enhancement for wind turbines equipped with fixed-speed induction generators (IGs) in large interconnected power systems is presented in this study. The low-voltage-ride-through (LVRT) capability is provided by extending the range of the operation of the controlled system to include typical post-fault conditions. A systematic procedure is proposed to design decentralised multi-variable controllers for large interconnected power systems using the linear quadratic (LQ) output-feedback control design method and the controller design procedure is formulated as an optimisation problem involving rank-constrained linear matrix inequality (LMI). In this study, it is shown that a static synchronous compensator (STATCOM) with energy storage system (ESS), controlled via robust control technique, is an effective device for improving the LVRT capability of fixed-speed wind turbines.

Published in:

IET Generation, Transmission & Distribution  (Volume:6 ,  Issue: 8 )