Title :
An Improved DC-Link Voltage Control Method for Multiple Grid Connected Converter in Direct Drive Wind Power Generation System
Author :
Hu, Weihao ; Wang, Yue ; Song, Xianwen ; Wang, Zhaoan
Author_Institution :
Xi an Jiaotong Univ., Xi´´an
Abstract :
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.
Keywords :
AC-DC power convertors; DC-AC power convertors; electric drives; power generation control; power grids; voltage control; wind power plants; DC- link voltage fluctuation; DC-link voltage control method; IGBT; direct drive wind power generation system; harmonic current; multiple AC-DC-AC full-scale converter; multiple grid connected converter; Analog-digital conversion; Feedback; Insulated gate bipolar transistors; Mesh generation; Power generation; Power system harmonics; Voltage control; Voltage fluctuations; Wind energy generation; Wind power generation; DC-link voltage; Grid connected converter; Wind power generation;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802938
