Additional damping control method and device for doubly-fed wind turbine generator controller

Abstract

The invention provides a doubly-fed wind turbine generator controller additional damping control method and device. The method comprises the steps of determining a doubly-fed wind turbine generator rotor current reference value; determining a preset additional oscillation damping control instruction of a current inner loop damping controller, and determining a doubly-fed wind turbine generator rotor control instruction; and controlling the exciting current of the rotor of the doubly-fed wind turbine generator. According to the method, the doubly-fed wind turbine generator rotor control instruction is determined through the additional oscillation damping control instruction of the current inner loop damping controller, additional damping control of the doubly-fed wind turbine generator controller is achieved, the control process is simple, the calculated amount is small, the oscillation capacity of a damping system can be provided, and then the anti-interference capacity of a wind powergrid-connected system is improved; on the basis of a doubly-fed wind turbine generator rotor simplified control instruction and a doubly-fed wind turbine generator rotor control instruction compensation amount, a current inner loop damping controller additional oscillation damping control instruction is added, equivalent damping of a wind power grid-connected system in a sub-synchronous frequencyband is increased, and sub-synchronous oscillation of the wind power grid-connected system is effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a method and device for additional damping control of a doubly-fed wind turbine controller. Background technique [0002] Double Fed Induction Generator (DFIG, Double Fed Induction Generator) is a wound induction generator. The stator winding of the double-fed asynchronous generator is directly connected to the grid, and the rotor winding is connected to the grid through a frequency converter. The frequency of the rotor winding power supply, The voltage, amplitude and phase are automatically adjusted by the frequency converter according to the operation requirements, and the unit can realize constant frequency power generation at different speeds to meet the requirements of electric load and grid connection. Due to the use of AC excitation, the generator and the power system form a flexible connection, that is, the excitation current can be adjusted according ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency of the poor anti-interference ability of the wind power grid-connected system in the above-mentioned prior art, the present invention provides a doubly-fed wind turbine controller additional damping control method, including:

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