Wind-power generation system and operation control method therefor
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsShinji Arinaga, Takatoshi Matsushita, Tsuyoshi Wakasa, Masaaki Shibata, Akira Yasugi
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Abstract
An object is to improve the accuracy of power factor adjustment. Power-factor command values corresponding to individual wind turbines are determined by correcting a predetermined power-factor command value for an interconnection node using power factor correction levels set for the individual wind turbines.
Claims7
An operation control method for a wind-power generation system comprising a plurality of wind turbines and a central controller for providing control commands to the individual wind turbines, output powers of the individual wind turbines being supplied to a utility grid via a common interconnection node,
- wherein power-factor command values corresponding to the individual wind turbines are determined by correcting a predetermined power-factor command value for the interconnection node using power factor correction levels set for the individual wind turbines.
An operation control method for a wind-power generation system comprising a plurality of wind turbines and a central controller for providing control commands to the individual wind turbines, outputs of the individual wind turbines being supplied to a utility grid via a common interconnection node, wherein
- if the plurality of wind turbines include both variable-speed wind turbines and fixed-speed wind turbines, the overall power factor of the fixed-speed wind turbines at the interconnection node is calculated;
- the difference between the calculated power factor and a predetermined power-factor command value for the interconnection node is calculated;
- the predetermined power-factor command value is corrected using the calculated difference;
- and
- power-factor command values for the individual variable-speed wind turbines are determined based on the corrected predetermined power-factor command value.
A wind-power generation system comprising a plurality of wind turbines and a central controller for providing control commands to the individual wind turbines, output powers of the individual wind turbines being supplied to a utility grid via a common interconnection node,
- wherein power-factor command values corresponding to the individual wind turbines are determined by correcting a predetermined power-factor command value for the interconnection node using power factor correction levels set for the individual wind turbines.
A wind-power generation system comprising a plurality of wind turbines and a central controller for providing control commands to the individual wind turbines, outputs of the individual wind turbines being supplied to a utility grid via a common interconnection node,
- wherein, if the plurality of wind turbines include both variable-speed wind turbines and fixed-speed wind turbines,
- the central controller:
- calculates the overall power factor of the fixed-speed wind turbines at the interconnection node;
- calculates the difference between the calculated power factor and a predetermined power-factor command value for the interconnection node;
- corrects the predetermined power-factor command value using the calculated difference;
- and
- determines power-factor command values for the individual variable-speed wind turbines based on the corrected predetermined power-factor command value.
Dependencies are inferred from the claim text.