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An Improved DC-Link Voltage Control Method for Multiple Grid Connected Converter in Direct Drive Wind Power Generation System

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4 Author(s)
Weihao Hu ; Xi an Jiaotong University, Xi an, 710049, P.R. China. Email: ; Yue Wang ; Xianwen Song ; Zhaoan Wang

In order to reduce the current of each IGBT and reduce the harmonic current into the grid, a multiple AC-DC-AC full-scale converter which is suitable for high power direct drive wind power generation systems is adopted. The reasons of DC-link voltage fluctuation of the grid connected converter are analyzed. An improved DC-link voltage control method for multiple grid connected converter in direct drive wind power generation systems is proposed in this paper to limit the fluctuation range of the DC-link voltage. The instantaneous generator power and grid voltage feedbacks are used to improve the dynamic response of the DC-link voltage. Simulation and experimental results verify the analysis and the conclusion.

Published in:

Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE

Date of Conference:

15-19 Feb. 2009