Faulty operation method of doubly-fed wind turbine stator-rotor flux linkage flux-weakening control
A wind turbine and rotor flux linkage technology, which is applied in the direction of controlling generators, control systems, electrical components, etc., can solve problems such as unit damage, achieve small fluctuations in active power and reactive power, improve the ability to operate without going out of the grid, Achieving a positive response
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[0021] The present invention will be further described below in conjunction with the accompanying drawings. figure 1 two-phase stator α β Stationary coordinate system, two-phase rotor angular velocity ω r to rotate α r β r Coordinate system, two-phase synchronous speed ω e to rotate d q Coordinate System. The control method of the present invention is based on the two-phase static coordinate system, the variables on the stator side and the rotor side, after coordinate conversion, the two-phase static α β variables in the coordinate system.
[0022] figure 2 static in two phases α β Equivalent circuit in DFIG vector form in the coordinate system, two-phase stationary α β The DFIG stator and rotor voltage, flux linkage, and electromagnetic torque equations in vector form in the coordinate system can be expressed as:
[0023] (1)
[0024] (2)
[0025] (3)
[0026] (4)
[0027] (5)
[0028] In the formula: R s , R r are the stator and rotor...
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