Matrix rectifier control method and matrix rectifier control system

The invention discloses a matrix rectifier control method and a matrix rectifier control system. The matrix rectifier control method comprises steps that an input voltage instantaneous value and an input current instantaneous value of a matrix rectifier are acquired, and the CLARK conversion of the above mentioned instantaneous values is carried out to acquire a voltage v alfa and a current v beta and a current i alfa and a current i beta of an alfa beta coordinate system correspondingly, and according to the voltage v alfa and the voltage v beta and the current i alfa and the current i beta, the input instantaneous active power Ps of the matrix rectifier is acquired; according to the output voltage and the output current of the matrix rectifier, the output power Po of the matrix rectifier is acquired according to the output voltage and the output current; the difference acquiring processing of the output power Po and the input instantaneous active power Ps is carried out to acquire a power difference value;