Photovoltaic module low-voltage direct connection protection method, system and equipment and storage medium

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module low-voltage direct connection protection method, system and device and a storage medium, and the method comprises the steps: deploying a sampling circuit in a photovoltaic power generation system, and collecting the PV terminal voltage of a photovoltaic module based on the sampling circuit; receiving the PV terminal voltage of the photovoltaic module acquired by the sampling circuit by using an MCU, and comparing the PV terminal voltage with 12V; if the PV terminal voltage of the photovoltaic module is lower than 12V, a driving signal is sent to a switch for controlling a direct connection mode through a chip, and whether the direct connection mode is carried out or not is determined; and if the PV terminal voltage of the photovoltaic module is higher than or equal to 12V, controlling a switch of a direct connection mode through a chip to enable the switch to enter a DC-DC working mode. Accord