Method and control arrangement for controlling central capacitors in wind power plants
AssigneeVestas Wind Systems A/S
InventorJorge Martinez Garcia
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Abstract
The present invention relates to a control system and an associated method for controlling an amount of reactive power delivered from a wind power plant to an associated power supply grid, the control system comprising a wind power plant controller and a number of wind turbine controllers each being in communication with said wind power plant controller, wherein the wind power plant controller is adapted to provide a grid voltage reference in response to a required total amount of reactive power to at least one wind turbine controller and operating a Switched Capacitor bank.
Claims7
A method for controlling at least one capacitor or reactor in a wind power plant, the wind power plant comprising at least one wind turbine generator, the method comprising:
- calculating a reactive power value based on an electrical grid reference value;
- defining at least one maximum reactive power operation range of at least one power converter in the wind power plant;
- connecting or disconnecting the at least one capacitor or reactor when a reactive power value is outside the at least one reactive power operation range;
- subtracting the reactive power of the connected capacitor or reactor from the total calculated reactive power value;
- and
- dispatching a wind turbine generator voltage reference to the at least one wind turbine based on the subtraction.
A wind power plant comprising:
- a wind turbine generator including at least one power converter;
- at least one capacitor or reactor;
- and
- a central control unit, said central control unit configured to:
- calculate a reactive power value based on an electrical grid reference value;
- define at least one maximum reactive power operation range of the at least one power converter in the wind power plant;
- connect or disconnect the at least one capacitor or reactor, when a reactive power value is outside the reactive power operation range;
- subtract the reactive power of the connected capacitor or reactor from the total calculated reactive power value;
- and
- dispatch a wind turbine generator voltage reference to the at least one wind turbine based on the subtraction.
Dependencies are inferred from the claim text.