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Real-Time Analysis of the Transient Response Improvement of Fixed-Speed Wind Farms by Using a Reduced-Scale STATCOM Prototype

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4 Author(s)
Gaztanaga, H. ; IKERLAN Technol. Center, Mondragon ; Etxeberria-Otadui, I. ; Ocnasu, D. ; Bacha, S.

As the total number of installed wind farms is far from being negligible, an upgrading of their technology is essential to fulfil new interconnection requirements. Power electronics are considered to be a key technology to accomplish this task. In this paper the use of a STATCOM for the improvement of the ride-through capability of fixed-speed wind farms is analyzed. Critical aspects like STATCOM rating and control are analyzed. A modified STATCOM controller is proposed, based on the series combination of a power factor control loop and a voltage regulation loop, which permits an optimized behavior of the wind farm both in normal and fault conditions. The contribution of the STATCOM is analyzed by means of Hybrid real-time tests (with a reduced-scale physical prototype) and offline (full scale) simulations in PSCAD/EMTDC. The study highlights the great contribution of STATCOMs to the transient behavior of fixed-speed wind farms and the importance of an appropriate control strategy choice on the performance and rating of the device

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Power Systems, IEEE Transactions on  (Volume:22 ,  Issue: 2 )