Energies 2013, 6(7), 3405-3421; doi:10.3390/en6073405
Article

Operation and Control of a Direct-Driven PMSG-Based Wind Turbine System with an Auxiliary Parallel Grid-Side Converter

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Received: 28 March 2013; in revised form: 27 June 2013 / Accepted: 1 July 2013 / Published: 12 July 2013
(This article belongs to the Special Issue Wind Turbines 2013)
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.
Abstract: In this paper, based on the similarity, in structure and principle, between a grid-connected converter for a direct-driven permanent magnet synchronous generator (D-PMSG) and an active power filter (APF), a new D-PMSG-based wind turbine (WT) system configuration that includes not only an auxiliary converter in parallel with the grid-side converter, but also a coordinated control strategy, is proposed to enhance the low voltage ride through (LVRT) capability and improve power quality. During normal operation, the main grid-side converter maintains the DC-link voltage constant, whereas the auxiliary grid-side converter functions as an APF with harmonic suppression and reactive power compensation to improve the power quality. During grid faults, a hierarchical coordinated control scheme for the generator-side converter, main grid-side converter and auxiliary grid-side converter, depending on the grid voltage sags, is presented to enhance the LVRT capability of the direct-driven PMSG WT. The feasibility and the effectiveness of the proposed system’s topology and hierarchical coordinated control strategy were verified using MATLAB/Simulink simulations.
Keywords: permanent magnet synchronous generator (PMSG); low voltage ride through (LVRT); active power filter (APF); grid fault
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MDPI and ACS Style

Wu, Z.; Dou, X.; Chu, J.; Hu, M. Operation and Control of a Direct-Driven PMSG-Based Wind Turbine System with an Auxiliary Parallel Grid-Side Converter. Energies 2013, 6, 3405-3421.

AMA Style

Wu Z, Dou X, Chu J, Hu M. Operation and Control of a Direct-Driven PMSG-Based Wind Turbine System with an Auxiliary Parallel Grid-Side Converter. Energies. 2013; 6(7):3405-3421.

Chicago/Turabian Style

Wu, Zaijun; Dou, Xiaobo; Chu, Jiawei; Hu, Minqiang. 2013. "Operation and Control of a Direct-Driven PMSG-Based Wind Turbine System with an Auxiliary Parallel Grid-Side Converter." Energies 6, no. 7: 3405-3421.

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