电工技术学报  2021, Vol. 36 Issue (10): 2161-2168    DOI: 10.19595/j.cnki.1000-6753.tces.L90036
高电压与放电 |
融合频域介电谱及支持向量机的变压器油浸纸绝缘老化状态评估
范贤浩, 刘捷丰, 张镱议, 王子潇
广西大学电气工程学院 南宁 530004
Aging Evaluation of Transformer Oil-Immersed Insulation Combining Frequency Domain Spectroscopy and Support Vector Machine
Fan Xianhao, Liu Jiefeng, Zhang Yiyi, Wang Zixiao
School of Electrical Engineering Guangxi University Nanning 530004
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摘要 变压器油纸绝缘老化-受潮协同效应能够显著影响其频域介电谱(FDS)数据,因此,在绝缘严重受潮情况下难以利用FDS技术实现纸绝缘老化状态的准确评估。鉴于此,该文融合FDS以及支持向量机(SVM)提出了一种考虑水分-老化协同效应的变压器油浸纸绝缘老化状态评估方法。在当前的研究中,首先,制备具有不同老化及受潮状态的油浸纸绝缘样本,并基于FDS测试提取用于表征绝缘劣化状态的特征参量。其次,基于多元回归分析构建用于训练老化状态分类模型的拟合介电特征参量数据库。最后,利用拟合介电特征参量数据库和SVM构建用于老化状态评估的分类模型。研究结果证明,构建的分类模型可以准确评估不同受潮状态的变压器油浸纸绝缘样本的老化状态。
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关键词 变压器油浸纸绝缘老化状态评估频域介电谱支持向量机    
Abstract:The aging-moisture synergistic effect of transformer oil-paper insulation can significantly affect its frequency-domain spectroscopy (FDS) data. It is difficult to use the traditional FDS technique to accurately assess the aging state of paper insulation under serious damp conditions. Therefore, combined with the FDS and support vector machine (SVM), a novel method of aging evaluation of transformer oil-immersed paper insulation considering the aging-moisture synergistic effect was proposed. Firstly, the oil-immersed paper insulation samples with different aging and moisture states were prepared, and the feature parameters used to characterize the deterioration state were extracted based on the FDS test. Then, a fitting database of dielectric feature parameters for training classification model of aging state is constructed based on multiple regression analysis. Finally, a classification model for aging state evaluation is constructed based on SVM and fitting database. The research findings prove that the constructed classification model can accurately evaluate the aging state of transformer oil-immersed paper insulation samples with different damp conditions.
Key wordsTransformer    oil-immersed paper insulation    aging state evaluation    frequency domain spectroscopy (FDS)    support vector machine (SVM)   
收稿日期: 2020-05-26     
PACS: TM855  
基金资助:国家自然科学基金(51867003)和广西自然科学基金(2018JJB160064)资助项目
通讯作者: 刘捷丰,男,1985年生,讲师,硕士生导师,研究方向为变压器绝缘状态评估与故障诊断。E-mail:jiefengliu2018@gxu.edu.cn   
作者简介: 范贤浩,男,1995年生,博士研究生,研究方向为变压器绝缘状态评估与故障诊断。E-mail:xianhao_fan@163.com
引用本文:   
范贤浩, 刘捷丰, 张镱议, 王子潇. 融合频域介电谱及支持向量机的变压器油浸纸绝缘老化状态评估[J]. 电工技术学报, 2021, 36(10): 2161-2168. Fan Xianhao, Liu Jiefeng, Zhang Yiyi, Wang Zixiao. Aging Evaluation of Transformer Oil-Immersed Insulation Combining Frequency Domain Spectroscopy and Support Vector Machine. Transactions of China Electrotechnical Society, 2021, 36(10): 2161-2168.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.L90036          https://dgjsxb.ces-transaction.com/CN/Y2021/V36/I10/2161