Miscellaneous Operations of Variable Speed Wind Turbine Driven Permanent Magnet Synchronous Generator.

The present development of power electronic encourages to use variable speed wind turbine (VSWT) driving a doubly fed induction generator (DFIG), wound field synchronous generator (WFSG) or permanent magnet synchronous generator (PMSG) for wind power generation. Among those, operation and stability analyses (both dynamic and transient) of DFIG type of VSWT have already been reported in many literatures. On the other hand, operation and stability analyses of synchronous generator type of VSWT are not sufficient enough. This paper focuses on various operations of variable speed wind turbine driving a PMSG (VSWT-PMSG), developing suitable control strategies for the frequency converter in the system. Dynamic characteristic of VSWT-PMSG is analyzed using real wind speed data measured in Hokkaido Island of Japan. Transient characteristic of VSWT-PMSG during network fault condition is also analyzed in detail for both symmetrical and unsymmetrical faults. Moreover, permanent fault due to unsuccessful reclosing is considered, which is one of the salient features of this study. Extensive simulation results are presented which verifies the effectiveness of the control strategy, of VSWT-PMSG at different operating regions. [ABSTRACT FROM AUTHOR]