Low Voltage Ride-Through of Directly Driven Wind Turbine...

javen88

Low Voltage Ride-Through of Directly Driven Wind Turbine with Permanent Magnet Synchronous

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2010-2-1 22:10 上传

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rrshengqi

Abstract—A model of the directly driven wind turbine with
permanent magnet synchronous generator (D-PMSG) was
described in this paper.  The D-PMSG was connected to a host
AC power grid by a full scale power converter system which
comprised two back-to-back PWM voltage source converters
(VSCs) and a common DC-link. Active and reactive power of the
two VSCs were controlled independently by employing PI
current controllers with cross-coupling decoupling. In order to
enhance its capability of low voltage ride-through (LVRT), the
control strategy was proposed, the generator power was reduced
according to the ratio of actual and rated grid voltage when the
power characteristic of windmill was analyzed. Simulation results
show that during voltage dip the proposed strategy can limit DC
voltage and the rotational speed to their reference values,
respectively, by adjusting the power of the generator and the
pitch angle of the windmill, and supply reactive power for the
grid.
Keywords- Directly Driven Wind Turbine, Permanent Magnet
Synchronous Generator(PMSG), Voltage Dip, Low Voltage Ride-
through, Reactive Compensation

yexiaolin

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