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US 6,856,038 B2Granted
Variable speed wind turbine having a matrix converter
AssigneeVestas Wind Systems A/S
InventorsAnders V. Rebsdorf, Lars Helle
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Abstract
A variable speed wind turbine is disclosed comprising a turbine rotor that drives a doubly-fed induction generator, a matrix converter which converts variable frequency output into constant frequency output, and a control unit and a protection circuit for the matrix converter. Power is circulated in the system allowing for sensorless detection of rotor position and better output ratios of power from the system.
Claims1
A method for operating a variable speed wind turbine comprising:
- configuring a generator for connection to a utility grid;
- connecting a matrix converter with a plurality of switches connected to the generator;
- supplying power from generator to the utility grid using the matrix converter;
- and
- actively damping drive-train oscillations.
2 more elements
Dependencies are inferred from the claim text.