DocumentCode :
3475773
Title :
Research on the application of parallel back-to-back PWM converter on direct-drive wind power system
Author :
Jian-lin, Li ; Shu-ju, Hu ; Mei, Li ; Ying, Zhu ; De-guo, Kong ; Hong-hua, Xu
Author_Institution :
Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing
fYear :
2008
fDate :
6-9 April 2008
Firstpage :
2504
Lastpage :
2508
Abstract :
With numerous advantages, the direct drive, grid-connected permanent magnet synchronous generation system represents one important trend of wind power applications nowadays. With active controls, parallel operation is becoming a promising solution in three-phase power conversion. In order to solve the zero-sequence circulating current problem, a novel converter topology with isolated DC link dual back-to-back PWM parallel converter has been proposed for the application of PMSG to the VSCF power conversion. A carrier phase shifted (CPS-SPWM) technique is used in parallel converter systems in order to reduce current ripples. Carrier phase shifted technique based on paralleling back to back PWM converter was applied on direct drive wind power system. Good performance is attained even if the switching frequency is only 1 k Hz as shown in the experimental results, which means that high equivalent switch frequency and current waveform under low switch frequency condition are realized. At the same time, avoid a zero-sequence circulating problem.
Keywords :
PWM power convertors; network topology; permanent magnet machines; power grids; switching convertors; synchronous motor drives; wind power plants; active controls; carrier phase shifted technique; converter topology; current ripples; current waveform; direct-drive wind power system; grid-connected permanent magnet synchronous generation system; parallel back-to-back PWM converter; parallel operation; switching frequency; three-phase power conversion; zero-sequence circulating current problem; Frequency; Mesh generation; Permanent magnets; Power conversion; Power generation; Pulse width modulation converters; Switches; Synchronous generators; Wind energy; Wind energy generation; Back to back PWM converter; Carrier phase shifted(CPS); Direct-drive wind power system; Full-scale power; Permanent Magnet Synchronous Generator (PMSG); parallel operation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on
Conference_Location :
Nanjuing
Print_ISBN :
978-7-900714-13-8
Electronic_ISBN :
978-7-900714-13-8
Type :
conf
DOI :
10.1109/DRPT.2008.4523832
Filename :
4523832
Link To Document :
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