SERIES/PARALLEL CONVERTER PROTECTION SYSTEM, CONVERSION CONTROL METHOD, AND CONVERTER

Embodiments of this application provide a serial-parallel converter protection system, including a controller, a drive, a first switching transistor, and a second switching transistor. An input terminal of a converter is connected to an output terminal of the converter through the first switching transistor. The output terminal of the converter is connected in parallel with the second switching transistor, and the controller controls on and off of the first switching transistor and the second switching transistor. When an output voltage of the converter is greater than a first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on. In embodiments of this application, when the output voltage of the converter is greater than the first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on, so that the converter is bypassed, thereby preventing a voltage and a current from impacting a component inside the converter. Embodiments of this application further provide a corresponding controller and converter.