The invention discloses a three-phase four-switch
rectifier direct
power control model prediction control method. The method includes: A, measuring the three-phase current, the three-phase
grid voltage, and the voltages of two DC side capacitors through a
current sensor and a
voltage sensor in a
rectifier; B, calculating the
voltage vectors corresponding to four switch combinations (00, 01, 11, 10) through the measured voltages of the DC capacitors; C, predicting the active powers, the reactive powers, and the
capacitor voltages which are corresponding to four
voltage vectors according to the measured phase current, the measured phase voltage; E, calculating cost functions of the voltage vectors: subtracting a prediction value and a reference value, and then obtaining an absolute value, multiplying various values and weight coefficients, and finally adding the obtained values; and F, applying the switch state corresponding to the
voltage vector having the minimum cost function to the
rectifier. The method is suitable for various rectification systems and various active filtering systems which are driven by a three-phase four-switch.