System and method for voltage control of wind generators
AssigneeGeneral Electric Company
InventorsEinar Vaughn Larsen, Alfredo Sebastian Achilles
Life of this patent
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Abstract
A system and associated method for reactive power generation for a wind turbine generator includes receiving a higher-than-generator level voltage command signal. A reactive current is determined for the wind turbine generator in response to the voltage command signal and is transmitted to a controller of the wind turbine generator for generating a real and reactive power based on the reactive current command. A trim value may be generated and applied to the voltage command signal.
Claims14
A method for reactive power generation for a wind turbine generator within a wind farm, comprising:
- receiving, from a field-level controller, a field-level voltage command signal, the field-level voltage command determined as a function of a power output of the wind farm and a voltage at a point of common coupling of a plurality of wind turbine generators;
- determining a generator-level voltage command for the wind turbine generator by adjusting the field-level voltage command signal as a function of a local reactive power droop characteristic for the wind turbine generator;
- determining a reactive current command for the wind turbine generator in response to the generator-level voltage command;
- transmitting the reactive current command to a controller of the wind turbine generator;
- and
- generating, via the controller of the wind turbine generator, a reactive power of the wind turbine generator based on the reactive current command that is determined in response to the field-level voltage command signal.
A method for reactive power generation for a wind turbine generator, within a wind farm, comprising:
- receiving a field-level voltage command for a wind turbine generator from a field-level controller, the field-level voltage command determined as a function of a power output of the wind farm and a voltage at a point of common coupling of a plurality of wind turbine generators;
- receiving a feedback reactive power signal for the individual wind turbine;
- applying a local reactive power droop characteristic for the wind turbine generator to the feedback reactive power signal to generate a voltage trim value;
- limiting the voltage trim value to a predetermined voltage range;
- applying the voltage trim value to the field-level voltage command to generate an adjusted voltage command;
- limiting the adjusted voltage command to a predetermined voltage range;
- generating a voltage error signal based on a measured voltage of the wind turbine generator and the adjusted voltage command;
- generating a reactive current command based on the voltage error signal, and limiting the reactive current command to a predetermined current range;
- and
- generating a reactive power of the wind turbine generator based on the reactive current command that is based on the voltage command received from the field-level controller.
A method for reactive power generation for a wind turbine generator, within a wind farm, comprising:
- receiving a field-level voltage command for a wind turbine generator from a field-level controller, the field-level voltage command determined as a function of a power output of the wind farm and a voltage at a point of common coupling of a plurality of wind turbine generators;
- receiving a feedback real power signal for the individual wind turbine;
- applying a real power offset value to the feedback real power signal to generate a voltage trim value;
- limiting the voltage trim value to a predetermined voltage range;
- applying the voltage trim value to the field-level voltage command to generate an adjusted generator level voltage command;
- limiting the adjusted generator level voltage command to a predetermined voltage range;
- generating a voltage error signal based on a measured voltage of the wind turbine generator and the adjusted generator level voltage command;
- generating a reactive current command based on the voltage error signal, and limiting the reactive current command to a predetermined current range;
- and
- generating a reactive power of the wind turbine generator based on the reactive current command that is based on the field-level voltage command received from the field-level controller.
Dependencies are inferred from the claim text.