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On-line Access: 2014-03-05

Received: 2013-08-26

Revision Accepted: 2013-11-13

Crosschecked: 2014-02-19

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Journal of Zhejiang University SCIENCE C 2014 Vol.15 No.3 P.232-240


A power conversion system for PMSG-based WECS operating with fully-controlled current-source converters

Author(s):  Jian-yu Bao, Wei-bing Bao, Yu-ling Li

Affiliation(s):  Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China; more

Corresponding email(s):   baojy@nit.zju.edu.cn

Key Words:  Grid-connected, Wind energy conversion, Current-source rectifier, Multilevel current-source inverter

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Jian-yu Bao, Wei-bing Bao, Yu-ling Li. A power conversion system for PMSG-based WECS operating with fully-controlled current-source converters[J]. Journal of Zhejiang University Science C, 2014, 15(3): 232-240.

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author="Jian-yu Bao, Wei-bing Bao, Yu-ling Li",
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%A Jian-yu Bao
%A Wei-bing Bao
%A Yu-ling Li
%J Journal of Zhejiang University SCIENCE C
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C1300231

T1 - A power conversion system for PMSG-based WECS operating with fully-controlled current-source converters
A1 - Jian-yu Bao
A1 - Wei-bing Bao
A1 - Yu-ling Li
J0 - Journal of Zhejiang University Science C
VL - 15
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SP - 232
EP - 240
%@ 1869-1951
Y1 - 2014
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C1300231

We propose a new power conversion system for a permanent magnet synchronous generator (PMSG) based grid-connected wind energy conversion system (WECS) operating with fully-controlled back-to-back current-source converters. On the generator side, two independent current-source rectifiers (CSRs) with space-vector pulse width modulation (SVPWM) are employed to regulate and stabilize DC-link currents. Between DC-link and the electrical grid, a direct-type three-phase five-level current-source inverter (CSI) is inserted as a buffer to regulate real and reactive power fed to the grid and thus adjusts the grid side power-factor. We also present a current-based maximum power point tracking (MPPT) scheme, which helps the generator extract the maximum power through closed-loop regulation of the generator speed. By applying the multilevel modulation and control strategies to the grid-side five-level CSI, a multilevel output current waveform with less distortion is produced, and the bulk requirement of the output capacitor filter to eliminate the harmonic current is reduced. All the proposed concepts are verified by simulation models built in a PSIM environment.




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