Methods and apparatus for controlling windfarms and windfarms controlled thereby
First Claim
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1. A method for controlling power produced by a windfarm, said method comprising:
- regulating active power produced by the windfarm in accordance with an apparent power setpoint; and
regulating a power factor of the windfarm in accordance with a power factor setpoint, except that, during periods in which the apparent power setpoint is approached or exceeded, reducing a magnitude of an angle of a power factor setpoint towards zero and regulating the power factor of the windfarm in accordance with the reduced power factor setpoint angle magnitude.
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Abstract
A method for controlling power produced by a windfarm includes regulating active power produced by the windfarm in accordance with an apparent power setpoint, and regulating a power factor of the windfarm in accordance with a power factor setpoint. However, during periods in which the apparent power setpoint is approached or exceeded, the method includes reducing a magnitude of an angle of a power factor setpoint towards zero and regulating the power factor of the windfarm in accordance with the reduced power factor setpoint angle magnitude.
18 Citations
20 Claims
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1. A method for controlling power produced by a windfarm, said method comprising:
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regulating active power produced by the windfarm in accordance with an apparent power setpoint; and
regulating a power factor of the windfarm in accordance with a power factor setpoint, except that, during periods in which the apparent power setpoint is approached or exceeded, reducing a magnitude of an angle of a power factor setpoint towards zero and regulating the power factor of the windfarm in accordance with the reduced power factor setpoint angle magnitude. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for controlling power produced by a windfarm, said apparatus configured to:
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regulate active power produced by the windfarm in accordance with an apparent power setpoint; and
regulate a power factor of the windfarm in accordance with a power factor setpoint, except that, during periods in which the apparent power setpoint is approached or exceeded, reduce a magnitude of an angle of a power factor setpoint towards zero and regulating the power factor of the windfarm in accordance with the reduced power factor setpoint angle magnitude. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A regulated windfarm comprising:
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one or more wind turbines having a combined output coupled to a utility grid;
measuring instruments configured to provide measurements of at least apparent power and power factor;
an apparent power control loop responsive to an apparent power setpoint and a measured apparent power to provide power commands to the one or more wind turbines to regulate the active power output of the windfarm towards the apparent power setpoint; and
a power factor control loop responsive to the measured apparent power and the measured power factor to regulate a power factor of the windfarm in accordance with a power factor setpoint, said power factor loop further including a power factor foldback function so that during periods in which the apparent power setpoint is approached or exceeded, an angle magnitude of the power factor setpoint is reduced towards zero and said power factor control loop regulates the power factor of the windfarm in accordance with the reduced power factor setpoint angle magnitude. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification