Calculation method for calculating limit line loss of high-proportion new energy access power distribution network

The invention relates to the technical field of power distribution network limit line loss analysis and calculation, in particular to a calculation method considering high-proportion new energy access power distribution network limit line loss, and provides a power distribution network limit line loss calculation model based on an unscented transformation method by establishing a DG probability model and a power distribution network load probability model. The influence of the fluctuation and uncertainty of the DG on the line loss of the power distribution network is considered; according to the method, an IEEE69 node system is taken as an example, the influence of DG access on the node voltage and branch power of the power distribution network is analyzed, and due to the fluctuation and uncertainty of DG output, the change range of line loss is larger than that before DG access; compared with the line loss results obtained by the unscented transformation method and the Monte Carlo simulation method, the calc