Abstract:Feeder-transformer connectivity is an important basic data. The correctness of feeder-transformer connectivity will affect the development of distribution network business, including line loss calculation, breakdown repair and outage management and so on.The traditionally manual way of verifying is time consuming, labor intensive and can not insure real-time. In order to solve the problem, the feeder-transformer connectivity verification method which includes basic method, core method and matching method has been proposed. The basic method is used to calculate the similarity of the voltage curves. The correlation coefficient is used to measure the similarity. The reduction method of transformer’s outlet voltage when three-phase load is unbalanced is the core method. The reduction method can assure the correctness of correlation coefficient. The matching method is used to distinguish to which 10kV feeder the substation area is connected. In this paper, the influences of voltage loss have been studied. The results show that there exists a inverse proportion relationship between correlation coefficient and average voltage loss coefficient or maximum voltage loss coefficient. The greater the voltage loss coefficient is, the less the correlation coefficient is. The feeder-transformer connectivity verification method in this paper can realize automatic verification and can solve the problem of labor intensive and time consuming of manual way.