Distributed photovoltaic power generation planning method and device considering optimal line loss of power distribution network

The invention discloses a distributed photovoltaic power generation planning method and device considering optimal line loss of a power distribution network, and the method comprises the steps: building a distributed photovoltaic power generation optimal planning model; solving the line loss net increment after a single distributed photovoltaic power station is accessed and a plurality of distributed photovoltaic power stations are accessed by adopting a partial line loss calculation strategy based on branch current change to obtain an optimal distributed photovoltaic access point and access capacity; and establishing a flow of the distributed photovoltaic optimal planning method based on the power distribution network line loss optimal strategy, performing comparative analysis on active loss values and voltage amplitudes before and after access of a single distributed photovoltaic power station and access of a plurality of distributed photovoltaic power stations, and determining a planning strategy. Accordin