Distribution Network Precise Investment Strategy Based on Hierarchical Identification of Weak Links

In order to find a precise distribution network investment strategy based on hierarchical identification of weak links, firstly, sensitivity analysis is carried out from two aspects of equipment failure parameters and distribution network characteristic parameters, and an analysis method of multi dimensional factors is proposed to identify the hierarchical weak links. Then, the investment cost and benefit of reliability improvement measures are calculated, and the precise investment strategy based on weak links is proposed. Finally, a city distribution network is selected for analysis. The sensitivity of reliability parameters is calculated, and the optimal investment strategy for each region is put forward. The results show that this method can identify hierarchical weak links and obtain the optimal investment. It is a feasible method for the distribution network transformation.