Method and controller for controlling converter device and conversion system

Abstract

Embodiments of present disclosure provide a method and controller for controlling a converter device and a conversion system comprising the controller. The method comprises: obtaining a first measured signal indicating a first voltage input from a power source to the converter device in a first operating mode of the converter device, at least one power switch of the converter device being switched between on and off states in the first operation mode; comparing the first voltage to a first threshold; and in response to the first voltage being above the first threshold, controlling the converter device to change from the first operating mode to a second operating mode of the converter device, the at least one power switch of the converter device being switched to the off state in the second operating mode. The embodiments of the present disclosure can effectively reduce or eliminate the overstress of the power switch in the converter without additional cost and loss.

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