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Energies 2016, 9(4), 302; doi:10.3390/en9040302

Power Quality Improvement and LVRT Capability Enhancement of Wind Farms by Means of an Inductive Filtering Method

1
College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
2
Hunan Electrical Power Corporation Economical & Technical Research, Changsha 410004, China
3
Department of Electrical Engineering, Wroclaw University of Technology, Wroclaw 50370, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Rodolfo Araneo
Received: 27 February 2016 / Revised: 31 March 2016 / Accepted: 13 April 2016 / Published: 20 April 2016

Abstract

Unlike the traditional method for power quality improvement and low-voltage ride through (LVRT) capability enhancement of wind farms, this paper proposes a new wind power integrated system by means of an inductive filtering method, especially if it contains a grid-connected transformer, a static synchronous compensator (STATCOM) and fully-tuned (FT) branches. First, the main circuit topology of the new wind power integrated system is presented. Then, the mathematical model is established to reveal the mechanism of harmonic suppression and the reactive compensation of the proposed wind power integrated system, and then the realization conditions of the inductive filtering method is obtained. Further, the control strategy of STATCOM is introduced. Based on the measured data for a real wind farm, the simulation studies are carried out to illustrate the performance of the proposed new wind power integrated system. The results indicate that the new system can not only enhance the LVRT capability of wind farms, but also prevent harmonic components flowing into the primary (grid) winding of the grid-connected transformer. Moreover, since the new method can compensate for reactive power in a wind farm, the power factor at the grid side can be improved effectively. View Full-Text
Keywords: wind farm; inductive filtering method; transformer; static synchronous compensator (STATCOM); low-voltage ride through (LVRT); harmonic current; power quality wind farm; inductive filtering method; transformer; static synchronous compensator (STATCOM); low-voltage ride through (LVRT); harmonic current; power quality
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Peng, Y.; Li, Y.; Xu, Z.; Wen, M.; Luo, L.; Cao, Y.; Leonowicz, Z. Power Quality Improvement and LVRT Capability Enhancement of Wind Farms by Means of an Inductive Filtering Method. Energies 2016, 9, 302.

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