Three-phase four-wire system APF improved vector resonance control method
A three-phase four-wire system, resonance control technology, applied in the direction of reducing/preventing power oscillation, can solve the problems of inability to guarantee dynamic response characteristics, occupying large memory space, unable to solve three-phase and other problems, achieving high stability margin and stability margin. The effect of large degree and good frequency adaptability
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[0043] A three-phase four-wire system APF improved vector resonance control method, the method comprises the following steps:
[0044] (1) Sampling the DC bus voltage in real time, controlling the DC bus voltage to keep constant to obtain the grid side current reference command;
[0045] (2) Real-time sampling of the grid-side current, establishing an improved resonant vector current controller, inputting the grid-side current control command and the measured value of the grid-side current into the improved resonant vector current controller to obtain a three-phase four-wire system APF modulation signal;
[0046] (3) Modulate the modulation signal to obtain the switching signals of the switching tubes in the three-phase four-wire APF, and control the switching tubes to work according to the switching signals.
[0047] Step (1) is specifically:
[0048] (11) Establish the DC bus voltage outer loop control loop: input the sampled DC bus voltage and the set DC bus reference volt...
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