ABSTRACT:
The application of a dynamic voltage restorer (DVR) connected
to a wind-turbine-driven doubly fed induction generator (DFIG) is investigated.
The setup allows the wind turbine system an uninterruptible fault ride-through
of voltage dips. The DVR can compensate the faulty line voltage, while the DFIG
wind turbine can continue its nominal operation as demanded in actual grid codes.
Simulation results for a 2 MW wind turbine and measurement results on a 22 kW
laboratory setup are presented, especially for asymmetrical grid faults. They
show the effectiveness of the DVR in comparison to the low-voltage ride-through
of the DFIG using a crowbar that does not allow continuous reactive power production.
KEYWORDS:
1.
Doubly fed
induction generator (DFIG)
2.
Dynamic voltage restorer (DVR)
3.
Fault ride-through and wind energy
SOFTWARE: MATLAB/SIMULINK
BLOCK
DIAGRAM:
CONCLUSION:
The
application of a DVR connected to a wind-turbine-driven DFIG to allow
uninterruptible fault ride-through of grid voltage faults is investigated. The
DVR can compensate the faulty line
voltage,
while the DFIG wind turbine can continue its nominal operation and fulfill any
grid code requirement without the need for additional protection methods. The
DVR can be used to protect already installed wind turbines that do not provide
sufficient fault ride-through behavior or to protect any distributed load in a
microgrid. Simulation results for a 2 MW wind turbine under an asymmetrical
two-phase grid fault show the effectiveness of the proposed technique in
comparison to the low-voltage ridethrough of the DFIG using a crowbar where
continuous reactive power production is problematic. Measurement results under transient
grid voltage dips on a 22 kW laboratory setup are presented to verify the
results.
REFERENCES:
[1]
M. Tsili and S. Papathanassiou, “A review of grid code technical requirements for
wind farms,” Renewable Power Generat., IET, vol. 3, no. 3, pp. 308–332,
Sep. 2009.
[2]
R. Pena, J. Clare, and G. Asher, “Doubly fed induction generator using back-to-back
pwm converters and its application to variable-speed windenergy generation,” Electr.
Power Appl., IEE Proc., vol. 143, no. 3, pp. 231–241, May 1996.
[3]
S.Muller,M.Deicke, andR.DeDoncker, “Doubly fed induction generator systems for
wind turbines,” IEEE Ind. Appl.Mag., vol. 8, no. 3, pp. 26–33, May/Jun.
2002.
[4]
J. Lopez, E. Gubia, P. Sanchis, X. Roboam, and L. Marroyo, “Wind turbines based
on doubly fed induction generator under asymmetricalvoltage dips,” IEEE
Trans. Energy Convers., vol. 23, no. 1, pp. 321–330, Mar. 2008.
