Control of a permanent magnet synchronous generator wind turbine
AssigneeUniversity of Alabama
InventorsShuhui Li, Tim A. Haskew
Life of this patent
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Abstract
Aspects of the disclosure relate to a control approach that utilizes a direct-current-based d-q vector control technology for variable-speed PMSG wind turbines based on full voltage source PWM converters. The control approach can be based on a nonlinear programming configuration for attaining a desired performance of PMSG wind turbine under operation constraints. The control approach can comprise a PMSG control unit that exploits fuzzy, adaptive, and PID control technologies in an optimal or nearly optimal control configuration. The control approach provides a smart wind turbine control technology that can be based on virtual lookup tables for effective PMSG power extraction.
Claims20
A method for direct-current control of a wind turbine comprising:
- supplying, by a first current-loop controller, a first current;
- supplying, by a second current-loop controller, a second current, the second current being in quadrature with the first current;
- generating a first reference voltage based at least on the first current and the second current;
- and
- generating a second voltage based at least on the first current and the second current
A method for power extraction in a wind turbine, the method comprising:
- providing a speed reference for the wind turbine based at least on power output and generator speed;
- generating a d-axis current reference based on the speed reference and a reactive power demand;
- generating a q-axis current reference based on the speed reference and the reactive power demand;
- generating a d-axis control voltage based on the d-axis current reference and the q-axis current reference;
- generating a q-axis control voltage based on the d-axis current reference and the q-axis current reference;
- and
- updating a power extracted from the wind turbine based at least on the d-axis control voltage, the q-axis control voltage, and rotation speed of a generator of the wind turbine.
A control system comprising:
- a first current control controller for supplying a d-axis current;
- a second current-loop controller for supplying a q-axis current;
- and
- a control unit for generating a d-axis reference voltage and a q-axis reference voltage based at least on the d-axis current and the q-axis current.
Dependencies are inferred from the claim text.