Three-phase four-switch rectifier direct power control model prediction control method

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.