Modularized controllable power electronic load test data processing method and device

The invention relates to the technical field of load data processing, and particularly discloses a modularized controllable power electronic load test data processing method and device, and the method comprises the steps: power unit extraction, three-phase PWM circuit analysis, test power supply voltage conversion, three-phase four-wire circuit evaluation, circuit test controllable judgment, and parallel operation of each three-phase PWM circuit. A multi-winding isolation transformer is connected with a power grid, the voltage class test degree of a three-phase PWM circuit is obtained through analysis, a data basis is provided for the voltage class between the input side of a follow-up matching test power supply and the three-phase PWM circuit, meanwhile, cascade operation is carried out on all single-phase H-bridge circuits, a high-voltage three-phase four-wire circuit is constructed, and the high-voltage three-phase four-wire circuit is connected with the power grid. The three-phase four-wire circuit is con