Comprehensive Condition Evaluation of Distribution Transformer Considering Internal Operation, External Environment, and Load Operation for Business Expansion

Shengxiang Xie, Danni Dai, Weifeng Dong and Yuling He ()
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Shengxiang Xie: Dongguan Power Supply Bureau of Guangdong Power Grid Co., Ltd., Dongguan 523000, China
Danni Dai: Dongguan Power Supply Bureau of Guangdong Power Grid Co., Ltd., Dongguan 523000, China
Weifeng Dong: Dongguan Power Supply Bureau of Guangdong Power Grid Co., Ltd., Dongguan 523000, China
Yuling He: Department of Mechanical Engineering, North China Electric Power University, Baoding 071000, China

Energies, 2025, vol. 18, issue 10, 1-18

Abstract: This paper proposes a comprehensive condition evaluation method for distribution transformers considering their internal operation, external environment, and load operation for business expansion. Unlike the existing studies, the proposed method can not only comprehensively consider the impacts of equipment aging, environmental influence, and post-business-expansion load variations on the distribution transformer’s condition but can also effectively simplify the process of determining the comprehensive weight and identifying the condition of the distribution transformer. Firstly, a comprehensive condition evaluation indicator system for distribution transformers is established. Subsequently, the comprehensive weight for each indicator of the distribution transformer is calculated by using the ordering relation analysis–principal component analysis (ORA-PCA) method and the principle of minimum discrimination information. Based on this, an improved golden section method is utilized to construct evaluation criterion clouds. Moreover, a comprehensive condition evaluation model for distribution transformers is developed based on the cloud model and the expectation curve method. Finally, the model effectiveness is validated by the case study, and a sensitivity analysis is conducted for the internal operation, external environment, and load operation of distribution transformers for business expansion, providing theoretical support for condition classification boundaries.

Keywords: distribution transformer; condition evaluation; business expansion; ORA-PCA; cloud model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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