An approach to planning the extension of distributed power supplies to the distribution network, taking into account uncertainty

Abstract

At present, there is a problem of high active line network loss in the distribution network expansion planning method for distributed power supply access, and a distributed power supply access distribution network expansion planning method that accounts for uncertainty is designed to improve this phenomenon. According to the coverage of the electricity consumers’ sites, the available supply capacity of the distributed power sources is evaluated, the wind speed is discounted by the hub height of the wind turbines, the uncertainty is taken into account to build a correlation model, the number of nodes in the grid is fully considered, the grid operation characteristics are extracted, the voltage of the nodes along the line is simplified and the distribution network expansion planning model is optimized. Test results: The method designed here has the lowest average active line network loss of 112.58 kW, which is 10.83 kW, 10.3 kW and 12.85 kW less than the other three methods respectively, indicating that the method designed here performs better with full consideration of the uncertainties.