Characteristic study of vector-controlled direct driven permanent magnet synchronous generator in wind power generation

With the advance of power electronic technology, direct driven permanent magnet synchronous generators (PMSG) have drawn more and more interests to wind turbine manufactures due to the advantages in PMSG wind turbine integration with the electric grid. This paper focuses on the analysis of PMSG characteristics through computer simulation. Compared to other analytical approaches, the specific features of the paper are 1) a PMSG steady-state model in d-q reference frame, 2) simulation-based study that reflects general PMSG d-q control strategies, and 3) characteristic study in both fixed and variable speed point of view. Extensive simulation analysis is performed to inspect how PMSG characteristics are affected by different d-q control conditions, such as torque, and real and reactive-power versus speed characteristics.

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