Method, device and equipment for calculating output current of photovoltaic power generation system and medium

The invention discloses a photovoltaic power generation system output current calculation method, device and equipment and a medium, and the method comprises the steps: calculating a voltage amplitude and a voltage phase angle jump variable of an access point of a photovoltaic power generation system after a fault based on a fault position of a power grid, parameters of the photovoltaic power generation system and parameters of the power grid; calculating the phase-locked deviation between the output phase angle of the phase-locked loop and the voltage phase angle of the access point; calculating a current control reference value after the fault; calculating the three-phase output current of the photovoltaic power generation system according to the obtained data; and decomposing each phase of output current to obtain a current component. According to the method, the influence of short-time asynchronization of a phase-locked loop and a power grid phase angle caused by voltage phase angle jump on the output sho