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US 8,575,773 B2Granted
Method and system for operating an electromechanical generator
AssigneeVestas Wind Systems A/S
InventorsAnshuman Tripathi, Shu Yu Cao, Victor Donescu, Søren Andersen, Rasool Beevi D-O Mohamed Arif
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Abstract
A method for operating an electromechanical generator is provided, the method comprising: determining a magnetic field reference parameter based on an electromagnetic power reference representing a desired output of the electromechanical generator, determining a scaling factor for adjusting an air-gap magnetization level of the electromechanical generator to reduce loss in operating the electromechanical generator, modifying the magnetic field reference parameter with the scaling factor; and operating the electromechanical generator based on at least the modified magnetic field reference parameter.
Claims16
A method for operating an electromechanical generator, comprising:
- determining a magnetic field reference parameter based on an electromagnetic power reference representing a desired output of the electromechanical generator,
- determining a scaling factor for adjusting an air-gap magnetization level of the electromechanical generator to reduce loss in operating the electromechanical generator, wherein determining the scaling factor includes determining the scaling factor for which the determined power loss is minimum from among a plurality of scaling factors and comprises measuring the generator temperature for the scaling factors in the order from lowest scaling factor to highest scaling factor wherein when the generator temperature of a scaling factor is measured to be higher than the generator temperature measured for the previous scaling factor, the determining process is stopped and the previous scaling factor is determined as the scaling factor for which the determined power loss is minimal among the scaling factors,
- modifying the magnetic field reference parameter with the scaling factor;
- and
- operating the electromechanical generator based on at least the modified magnetic field reference parameter.
2 more elements
A system for operating an electromechanical generator comprising:
- a determining circuit configured to determine a magnetic field reference parameter based on an electromagnetic power reference representing a desired output of the electromechanical generator and configured to determine a scaling factor for adjusting an air-gap magnetization level of the electromechanical generator to reduce loss in operating the electromechanical generator, wherein determining the scaling factor includes determining the scaling factor for which a determined power loss is minimum from among a plurality of scaling factors,
- wherein the determining circuit is configured to measure the generator temperature for the scaling factors in the order from lowest scaling factor to highest scaling factor wherein when the generator temperature of a scaling factor is measured to be higher than the generator temperature measured for the previous scaling factor, determining the scaling factor from the plurality of scaling factors is stopped and the previous scaling factor is determined as the scaling factor for which the determined power loss is minimal among the plurality of scaling factors;
- a modifier configured to modify the magnetic field reference parameter with the scaling factor;
- and
- a controller configured to operate the electromechanical generator based on at least the modified magnetic field reference parameter.
2 more elements
A wind turbine, comprising:
- a tower;
- a shaft disposed on the tower;
- a hub connected to the shaft, and supporting a plurality of blades;
- and
- a system coupled to the shaft, the system comprising:
- a determining circuit configured to determine a magnetic field reference parameter based on an electromagnetic power reference representing a desired output of the electromechanical generator and configured to determine a scaling factor for adjusting an air-gap magnetization level of the electromechanical generator to reduce loss in operating the electromechanical generator, wherein determining the scaling factor includes determining the scaling factor for which a determined power loss is minimum from among a plurality of scaling factors,
- wherein the determining circuit is configured to measure the generator temperature for the scaling factors in the order from lowest scaling factor to highest scaling factor wherein when the generator temperature of a scaling factor is measured to be higher than the generator temperature measured for the previous scaling factor, determining the scaling factor from the plurality of scaling factors is stopped and the previous scaling factor is determined as the scaling factor for which the determined power loss is minimal among the plurality of scaling factors;
- a modifier configured to modify the magnetic field reference parameter with the scaling factor;
- and
- a controller configured to operate the electromechanical generator based on at least the modified magnetic field reference parameter.
7 more elements
Dependencies are inferred from the claim text.