Wind turbine, and control method and apparatus for converter of wind turbine

A non-transitory computer-readable storage medium storing a computer program, wherein a method for controlling a converter of a wind turbine is implemented when the computer program is executed by a processor, and the method comprises:

• extracting a super-synchronous oscillation component of a grid-side voltage and a super-synchronous oscillation component of a grid-side current of the converter of the wind turbine;
• determining a phase angle of equivalent impedance of the converter of the wind turbine based on the super-synchronous oscillation component of the grid-side voltage and the super-synchronous oscillation component of the grid-side current;
• and
• setting an operation mode of the converter of the wind turbine to a current-source operation mode or a voltage-source operation mode based on at least one of the super-synchronous oscillation component of the grid-side voltage or the super-synchronous oscillation component of the grid-side current together with the phase angle.

A controller, comprising:

• a processor;
• and
• a memory storing a computer program, wherein when the computer program is executed by the processor, the processor is configured to implement operations comprising:
• extracting a super-synchronous oscillation component of a grid-side voltage and a super-synchronous oscillation component of a grid-side current of a converter of a wind turbine;
• determining a phase angle of equivalent impedance of the converter of the wind turbine based on the super-synchronous oscillation component of the grid-side voltage and the super-synchronous oscillation component of the grid-side current;
• and
• setting an operation mode of the converter of the wind turbine to a current-source operation mode or a voltage-source operation mode based on at least one of the super-synchronous oscillation component of the grid-side voltage or the super-synchronous oscillation component of the grid-side current together with the phase angle.

A converter of a wind turbine, comprising:

• a controller, comprising:
• a processor;
• and
• a memory storing a computer program, wherein when the computer program is executed by the processor, the processor is configured to implement operations comprising:
• extracting a super-synchronous oscillation component of a grid-side voltage and a super-synchronous oscillation component of a grid-side current of the converter of the wind turbine;
• determining a phase angle of equivalent impedance of the converter of the wind turbine based on the super-synchronous oscillation component of the grid-side voltage and the super-synchronous oscillation component of the grid-side current;
• and
• setting an operation mode of the converter of the wind turbine to a current-source operation mode or a voltage-source operation mode based on at least one of the super-synchronous oscillation component of the grid-side voltage or the super-synchronous oscillation component of the grid-side current together with the phase angle.

A wind turbine, comprising:

• a converter, comprising:
• a controller, comprising:
• a processor;
• and
• a memory storing a computer program, wherein when the computer program is executed by the processor, the processor is configured to implement operations comprising:
• extracting a super-synchronous oscillation component of a grid-side voltage and a super-synchronous oscillation component of a grid-side current of the converter of the wind turbine;
• determining a phase angle of equivalent impedance of the converter of the wind turbine based on the super-synchronous oscillation component of the grid-side voltage and the super-synchronous oscillation component of the grid-side current;
• and
• setting an operation mode of the converter of the wind turbine to a current-source operation mode or a voltage-source operation mode based on at least one of the super-synchronous oscillation component of the grid-side voltage or the super-synchronous oscillation component of the grid-side current together with the phase angle.