Variable speed wind turbine having a matrix converter
AssigneeVestas Wind Systems A/S, R&D
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.
Claims20
A variable speed wind turbine, comprising:
- a turbine rotor including at least one blade mounted to a rotatable turbine shaft;
- an induction generator having a stator and a rotor coupled to the turbine shaft for rotation therewith;
- a matrix converter including an array of switching elements;
- a matrix converter control unit to control the switching elements;
- and
- a protection circuit for protecting the matrix converter against over voltages.
A turbine according to 1, which further includes a means for facilitating the active damping of resultant drive-train oscillations.
A method for a variable speed wind turbine comprising:
- supplying power from an induction generator to a power grid using a matrix converter including using a protection circuit for protecting the matrix converter from over voltages.
Dependencies are inferred from the claim text.