Abstract:Distribution transformers are vital production equipment for power grid enterprises. But, there are a large number of manufacturers and there are huge differences in technology levels.It has brought great challenges to the effective management of power grid enterprises. Therefore, it is essential to improve the operational efficiency and cost of the company.This paper first expounds the significance of the management work of distribution transformer suppliers. From the perspective of equipment life cycle, it constructs a hierarchical management evaluation of distribution transformer suppliers covering “purchasing stage”, “network access operation stage” and “decommissioning retirement stage”. The model includes seven secondary indicators including “Supplier Qualification Assessment Results”, “Equipment Defect Rate”, and “Fund Recovery Ratio”. On this basis, the fuzzy complementary judgment matrix is constructed by using FAHP, the weight of each index is determined, and the consistency check is performed. The result is good.In the example, 20 distribution transformer suppliers of China Southern Power Grid Corporation were ranked in grades, and the results were in line with objective facts. Based on this, grid companies can differentiate their suppliers to improve quality and efficiency.