State evaluation model of distribution transformer considering environmental factors and operation data

Abstract

In the fault diagnosis of distribution transformer, in order to fully consider the influence of environmental factors and operation data on distribution transformer, a method of fault diagnosis model of distribution transformer considering environmental factors and operation data is established. First of all, according to the fault data of distribution transformer provided by Guangzhou Power Supply Bureau in recent five years, the environmental factors causing the fault of distribution transformer are calculated. The association rule mining algorithm is used to mine the external environmental factors of distribution transformer fault, and find out the external environmental factors that have a high impact on distribution transformer; secondly, according to the operation data of distribution transformer fault, select the important operation data of distribution transformer fault, and calculate the deviation between the data and the standard value, and take the final result as one of the evaluation indicators; then, in the use of Based on the evaluation of internal test data, the external factors and operation data are fully integrated into the model to establish a complete evaluation model. Finally, the health level of a 10kV distribution transformer in Guangzhou is evaluated in real time in one day. The research of this paper can provide reference for the fault diagnosis and operation maintenance of 10kV distribution transformer