Distribution transformer extension cost allocation method for distributed photovoltaic consumption

The invention discloses a distributed photovoltaic consumption-oriented distribution transformer expansion cost allocation method, which comprises the steps of determining a benefited transformer in a distribution network area, determining an allocation object according to a transformer area range where the benefited transformer is located, calculating the proportion of capacity allocation cost to electric quantity allocation cost according to historical data, and determining the distribution transformer expansion cost according to the proportion. Respectively calculating peak load responsibility coefficients and peak load consistency responsibility coefficients of each allocation object for different benefited transformers, calculating capacity allocation cost allocation coefficients corresponding to the allocation objects, and respectively calculating load level responsibility coefficients and load consistency responsibility coefficients of each allocation object for different benefited transformers; and ca