Three-level PWM (Pulse-Width Modulation) rectifier direct power control method
A power control and rectifier technology, applied in the direction of converting AC power input to DC power output, output power conversion device, electrical components, etc., can solve the problems of poor switch table effect and no influence degree
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[0026] The three-level PWM rectifier direct power control method based on grid voltage oriented switch table requires a higher sampling frequency, but it does not require coordinate rotation transformation and modulation strategy, and directly selects the appropriate basic vector from the switch table according to the hysteresis comparison results Effectively control the changes of instantaneous active power and reactive power, the control algorithm and control structure are simple, the dynamic response is fast, and the robustness is strong. The switch table is based on the discretized instantaneous power control model of the rectifier, by analyzing the specific influence degree of each basic vector in each sector on the instantaneous power, the power hysteresis is multi-level quantized, and at the same time, it takes into account the DC side. Point potential balance control is established.
[0027] The realization process of the present invention is as follows:
[0028] fig...
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