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Energies 2014, 7(9), 5922-5952; doi:10.3390/en7095922

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

Department of Electrical Engineering, University of Vigo, EEI, Campus Universitario. s/n, Vigo 36310, Spain
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Received: 26 June 2014 / Revised: 20 August 2014 / Accepted: 3 September 2014 / Published: 10 September 2014
(This article belongs to the Special Issue Wind Turbines 2014)

Abstract

Fixed-speed wind generator (FSWG) technology has an important presence in countries where wind energy started to be developed more than a decade ago. This type of technology cannot be directly adapted to the grid codes, for example those requirements related to the immunity level under voltage dips. That behavior is typically referred as low-voltage ride through (LVRT), and it usually implies certain reactive and active power injection requirements, both during a voltage dip and during the voltage recovery. In this context, a review is presented of the LVRT exigencies present in some of the countries with the most advanced grid codes (Denmark, Germany, Spain and the United Kingdom). In this paper, the capabilities of STATCOM-based devices for fulfilling the LVRT requirements in FSWGs are analyzed. For this purpose, two technologies are considered: a STATCOM with a supercapacitor, which improves its energy storage features; and a STATCOM with a supercapacitor and a DC-DC converter, to achieve higher discharge levels. View Full-Text
Keywords: wind energy; fixed-speed wind generator; STATCOM; supercapacitor; low-voltage ride-through wind energy; fixed-speed wind generator; STATCOM; supercapacitor; low-voltage ride-through
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Obando-Montaño, A.F.; Carrillo, C.; Cidrás, J.; Díaz-Dorado, E. A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines. Energies 2014, 7, 5922-5952.

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