Parallel Operation of Full Power Converters in Permanent-Magnet Direct-Drive Wind Power Generation System

Author

Li, Rui ; Xu, Dianguo

Author_Institution

Electr. Eng. Dept., Harbin Inst. of Technol., Harbin, China

Volume

60

Issue

4

fYear

2013

fDate

4/1/2013 12:00:00 AM

Firstpage

1619

Lastpage

1629

Abstract

Parallel operation is an effective way to improve the capacity of full power converter in permanent-magnet direct-drive wind power generation system. But it causes the zero-sequence circulating-current (ZSCC), which brings current discrepancy, current waveform distortion, power losses, and electromagnetic interference (EMI), etc. The paper proposes a new topology of full power converters which are composed of n full power converters. The n converters have the same structures and are in parallel with each other. Besides, the average models of the system are analyzed and the fundamental mechanism of ZSCC generation is given. Based on the above analysis, the control strategy of the system is designed. The simulation and experiment results of two parallel full power converters show the feasibility of the proposed theory and control scheme.

Keywords

circulators; electric drives; electromagnetic interference; losses; permanent magnet generators; power convertors; wind power plants; EMI; ZSCC; current discrepancy; current waveform distortion; electromagnetic interference; permanent-magnet direct-drive wind power generation system; power converter; power loss; zero-sequence circulating-current; Analytical models; Converters; Mathematical model; Switches; Topology; Voltage control; Wind power generation; Full power converters; parallel operation; wind power generation; zero-sequence circulating-current (ZSCC);

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2011.2148684

Filename

5759080