METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING STRING INVERTER, AND STORAGE MEDIUM

This application discloses a string inverter control method, apparatus, and system, and a storage medium, and belongs to the field of photovoltaic technologies. The method includes: in a process of performing IV curve scanning on one or more first direct current/direct current step-up circuits, controlling a change of an output voltage of one or more second direct current/direct current step-up circuits on which the IV curve scanning does not need to be performed, where a change trend of the output voltage and a change trend of an input voltage of the one or more first direct current/direct current step-up circuits on which the IV curve scanning is performed present a non-strictly monotonically increasing relationship. Therefore, for the direct current/direct current step-up circuit on which the IV curve scanning is performed, a voltage difference between two ends of the direct current/direct current step-up circuit is not always in a relatively high state, so that a ripple current on an input inductor in the direct current/direct current step-up circuit can be reduced. In this way, the following case can be avoided: Overcurrent protection is triggered on the direct current/direct current step-up circuit due to the excessively large ripple current on the input inductor.