A Transfer Learning Fault Diagnosis Model of Distribution Transformer Considering Multi-Factor Situation Evolution
Yang Zhichun1, Shen Yu1, Yang Fan1, Cai Wei2, Liang Laiming3
1. Electric Power Research Institute State Grid Hubei Electric Power Co. Ltd Wuhan 430077 China; 2. State Grid Electric Power Research Institute Wuhan Nari Co. Ltd Wuhan 430074 China; 3. Electric Power Research Institute of Electric Power Company in Xinjiang Province Urumqi 830018 China
Abstract:Aiming at the problem of limited fault data and data expiration of distribution transformers, a transfer learning fault diagnosis model of distribution transformer considering multi-factor situation evolution is proposed in this paper. Firstly, an evaluation index system for distribution transformer status is constructed, and fuzzy binary quantification is performed on the state variables. The relationship between the state variables and the fault is explored by the fuzzy Apriori algorithm, and the key state variables that induces transformer fault is extracted. The Tanimoto coefficient is introduced for the limited fault data of distribution transformers, and the effective auxiliary fault data is migrated to the target distribution transformer, on this basis, the fault diagnosis model of distribution transformer based on information migration is established. The health index is introduced to describe the distribution status and the auxiliary fault data with different health levels is migrated because data has expired, on this basis, the fault diagnosis model of distribution transformers with expired data was established. the weights of the target and auxiliary fault data in the above model are iteratively solved by using TrAdaBoost, and then the fault diagnostic model is output. Finally, an example analysis is carried on the basis of the distribution transformer fault data, the simulation results show that the fault diagnosis accuracy of the model in this paper is high, and it has stronger generalization ability than traditional diagnosis model.
杨志淳, 沈煜, 杨帆, 蔡伟, 梁来明. 考虑多元因素态势演变的配电变压器迁移学习故障诊断模型[J]. 电工技术学报, 2019, 34(7): 1505-1515.
Yang Zhichun, Shen Yu, Yang Fan, Cai Wei, Liang Laiming. A Transfer Learning Fault Diagnosis Model of Distribution Transformer Considering Multi-Factor Situation Evolution. Transactions of China Electrotechnical Society, 2019, 34(7): 1505-1515.
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