Comprehensive Evaluation of Transformer Oil-Paper State Based on Combined Weight-Double Base Point Method
Zou Yang1,2, He Qianling1,2, Cai Jinding1
1. College of Electrical Engineering and Automation Fuzhou University Fuzhou 350108 China; 2. Fujian Smart Electrical Engineering Technology Research Center Fuzhou 350108 China
Abstract：The accurate diagnosis of transformer oil-paper insulation state has important guiding significance for the formulation of maintenance strategy. In order to realize the objective scientific evaluation of the insulation state of oil-paper, a multi-feature comprehensive evaluation model of transformer oil-paper insulation state based on combined weighting-double base point method was established. Firstly, according to the shortcomings of the single feature quantity evaluation, based on the existing time-domain dielectric spectrum data, multiple aging feature quantities were extracted from the recovery voltage polarization spectrum and the extended Debye equivalent circuit respectively, and a standard evaluation index system was established. Secondly, to overcome the shortcomings of the single weighting method, the combination weighting model was used to take into account the subjective experience of experts and the objective differences of data. Finally, based on the double base point method, the closeness of the object was evaluated and the ideal point of the standard state were calculated, and the oil-paper insulation state was obtained. The case studies prove that the evaluation model built in this paper can effectively and accurately diagnose the insulation state of the transformer, which provides a new method for the evaluation of transformer oil-paper insulation state.
邹阳, 何倩玲, 蔡金锭. 基于组合赋权-双基点法的变压器油纸绝缘状态综合评估[J]. 电工技术学报, 2019, 34(20): 4400-4408.
Zou Yang, He Qianling, Cai Jinding. Comprehensive Evaluation of Transformer Oil-Paper State Based on Combined Weight-Double Base Point Method. Transactions of China Electrotechnical Society, 2019, 34(20): 4400-4408.
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2019, Vol. 34 
