Prime-mover dynamo plants – Electric control – Fluid-current motors
Reexamination Certificate
2009-03-31
2011-10-25
Lam, Thanh (Department: 2834)
Prime-mover dynamo plants
Electric control
Fluid-current motors
C290S055000
Reexamination Certificate
active
08044529
ABSTRACT:
A control system for a wind turbine is provided. A pitch-control unit establishes a pitch-reference signal representing a pitch to be set by the pitch-actuator system. A rotor-speed input receives a signal representing a speed of the rotor. A speed-reference input receives a speed-reference signal for the rotor speed. An inclination-signal input receives a signal representing a tower inclination. A pitch-reference output outputs the pitch reference signal. A modification unit is connected to the speed-reference input to receive the speed-reference signal and connected to the inclination-signal input to receive the inclination signal. The modification unit establishes a modification signal based on the inclination signal, to modify the speed-reference signal via the modification signal, and to output a modified-speed-reference signal. The pitch-control unit connected to the modification unit to receive the modified-speed-reference signal and establish the pitch-reference value at least based on the difference between the modified-speed-reference and the rotor-speed signals.
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Lam Thanh
Siemens Aktiegesellschaft
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