Research on the application of parallel back-to-back PWM converter on direct-drive wind power system

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 t...

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Bibliographic Details
Published in2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies pp. 2504 - 2508
Main Authors Li Jian-lin, Hu Shu-ju, Li Mei, Zhu Ying, Kong De-guo, Xu Hong-hua
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2008
Subjects
Back to back PWM converter
Carrier phase shifted(CPS)
Direct-drive wind power system
Frequency
Full-scale power
Mesh generation
parallel operation
Permanent Magnet Synchronous Generator (PMSG)
Permanent magnets
Power conversion
Power generation
Pulse width modulation converters
Switches
Synchronous generators
Wind energy
Wind energy generation
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Summary: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.
DOI:10.1109/DRPT.2008.4523832