Reactive power control system for a wind turbine generator
AssigneeVestas Wind Systems A/S
InventorsJorge Martinez Garcia, Naveen Kumar Boggarpu
Life of this patent
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Abstract
The invention relates to a control system for a wind turbine generator, WTG. The control system defines reactive limits for a reactive power reference for the WTG. The reactive limits are defined as a function of a physical parameter, e.g. the output voltage of the WTG. In case the reactive power reference exceeds the predefined limits, the reactive power reference is limited. By limiting the reactive power reference output voltages which exceed certain output voltage limits may be avoided and, thereby, a disconnection of the WTG from the grid may be avoided.
Claims16
A control system for a wind turbine generator, the wind turbine generator comprising a reactive power controller, the control system comprising:
- a processor;
- and
- a memory storing a program, which, when executed on the processor, performs an operation, the operation comprising:
- receiving an input reactive reference from an external source;
- identifying a reactive limit based on an output voltage of the wind turbine generator and the input reactive reference;
- determining that the input reactive reference exceeds the reactive limit, and in response setting an output reactive reference equal to the reactive limit;
- outputting the output reactive reference to the reactive power controller,
- wherein the reactive power controller is configured to control generation of reactive power from a power generator system of the wind turbine generator based, at least in part, on the output reactive reference;
- and
- providing the reactive limit to the external source.
A method for controlling a wind turbine generator, comprising:
- receiving an input reactive reference from an external source;
- identifying a reactive limit based on an output voltage of the wind turbine generator and the input reactive reference;
- determining that the input reactive reference exceeds the reactive limit, and in response setting an output reactive reference equal to the reactive limit;
- outputting the output reactive reference to a reactive power controller;
- controlling generation of reactive power from a power generator system of the wind turbine generator dependent on the output reactive reference;
- and
- providing the reactive limit to the external source.
A computer program product for controlling a wind turbine generator, the computer program product comprising:
- a computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable by one or more computer processors to perform an operation, the operation comprising:
- receiving an input reactive reference from an external source;
- identifying a reactive limit based on an output voltage of the wind turbine generator and the input reactive reference;
- determining that the input reactive reference exceeds the reactive limit, and in response setting an output reactive reference equal to the reactive limit;
- outputting the output reactive reference to a reactive power controller, wherein the reactive power controller is configured to control generation of reactive power from a power generator system of the wind turbine generator based, at least in part, on the output reactive reference;
- and
- providing the reactive limit to the external source.
Dependencies are inferred from the claim text.