Converter control method, device and system and storage medium

The invention discloses a converter control method, a converter control device, a converter control system and a storage medium. The converter control method comprises the following steps: acquiring an instantaneous alternating-current voltage of a common connection point and a preset reference alternating-current voltage; through voltage loop control, the current fluctuation quantity flowing into the capacitor at the common connection point is obtained; according to the current fluctuation quantity, the alternating current flowing into the weak grid system and the alternating current flowing out of the converter, calculating the inductance current fluctuation quantity between the converter and the common connection point, and obtaining a converter alternating current side voltage reference value through current loop control; and performing modulation through a modulation technology to generate a switch tube trigger signal of the converter. According to the converter control method, PCC point instantaneous vo