Power distribution network state sensing method for photovoltaic connection

The invention relates to the technical field of power systems, and particularly discloses a power distribution network state sensing method for photovoltaic connection, which comprises the following steps: acquiring a real-time voltage value of a power distribution network end, and when the duration that the real-time voltage value of the power distribution network end is greater than a nominal voltage value of the power distribution network end exceeds a preset duration, recording the duration as a power distribution network end verification period; obtaining state identification data of the power distribution network end based on the power distribution network end verification time period, and obtaining an operation state identification value of the power distribution network end in the period based on the state identification data; obtaining a verification signal of the power distribution network end in the period according to the operation state identification value of the power distribution network end i