Low-voltage traversing control method for double-fed wind power generation system
A double-fed wind power generation and low voltage ride-through technology, applied in wind power generation, AC network voltage adjustment, reactive power compensation, etc., can solve the problems of increased manufacturing cost, severe voltage drop, harmful impact of protection circuit system, etc. cost, and the effect of improving system performance
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[0020] The present invention is a low-voltage ride-through control method for a doubly-fed wind power generation system, comprising the following steps:
[0021] 1) Detect the zero-frequency transient magnetic flux component of the motor;
[0022] 2) When it is found that the motor has a sudden zero-frequency transient magnetic flux component, control the rotor-side converter and the grid-side converter to attenuate its zero-frequency transient magnetic flux component;
[0023] 3) Control the torque current and reactive power compensation current of the grid to suppress the growth of harmful voltage and prevent the formation of harmful current.
[0024] in:
[0025] The detailed steps to control the rotor-side converter are:
[0026] 1) According to the stator voltage and current feedback, the positive sequence component, negative sequence component and zero frequency transient component of the stator flux are obtained through the flux observer;
[0027] 2) Input the above-...
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