Dual-feed asynchronous wind power generator rotor current non-delay control method
A wind turbine and rotor current technology, applied in the direction of generator control parts, generator control, control system, etc., can solve the problem that the circuit cannot distinguish whether the grid voltage is balanced or unbalanced, which affects the dynamic control performance and dynamic control effect of the system Unsatisfactory problems, etc., to achieve the effect of improving uninterrupted operation (traveling) capability, simple and easy control method, and good dynamic response characteristics
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[0034] The present invention will be further described below in conjunction with the drawings and embodiments.
[0035] Fig. 2 is a schematic diagram of a method for controlling the rotor current of a doubly-fed asynchronous wind generator without delay according to the present invention. It includes the control object DFIG5, the rotor-side converter 1 (two-level or three-level voltage type PWM inverter) connected to the DFIG rotor, the Hall sensor 2 for three-phase stator and rotor current detection, and the three-phase stator The Hall sensor 7 for voltage detection, the encoder 4 for detecting the position and speed of the DFIG rotor, and the control loop for realizing the DFIG control target under the condition of unbalanced grid voltage. The control loop is composed of a feedback signal processing channel and a forward control channel. The feedback signal processing channel includes a software phase-locked loop (PLL) 6 for detecting the phase and frequency of the grid voltage,...
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