| 引用本文: | 贺德华,蔡金锭,蔡嘉.基于时域谱线特征量的变压器油纸绝缘诊断[J].电力自动化设备,2017,37(4): |
| HE Dehua,CAI Jinding,CAI Jia.Transformer oil-paper insulation diagnosis based on time-domain spectral curve characteristic parameters[J].Electric Power Automation Equipment,2017,37(4): |
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| 摘要: |
| 针对应用介电响应理论评估油纸绝缘老化状态存在的不足，提出一种新的变压器油纸绝缘诊断方法。对变压器的回复电压微分谱线进行解谱，分析时域微分子谱线的数量和弛豫时间常数比K τ 与绝缘老化状态间的关系，从而实现变压器油纸绝缘状态诊断。对多台变压器的测试数据进行统计和分析，得出结论：回复电压时域微分谱线的子谱线数随绝缘状态发生改变，油纸绝缘老化越严重，分解的子谱线数量越多；K τ 能准确判断绝缘油相对于绝缘纸的老化状态。 |
| 关键词: 变压器 油纸绝缘 时域微分解谱 弛豫响应 回复电压 绝缘诊断 |
| DOI：10.16081/j.issn.1006-6047.2017.04.018 |
| 分类号:TM855;TM41 |
| 基金项目:国家自然科学基金资助项目(61174117) |
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| Transformer oil-paper insulation diagnosis based on time-domain spectral curve characteristic parameters |
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HE Dehua1, CAI Jinding1, CAI Jia2
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1.College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;2.State Grid Fujian Electric Power Materials Company, Fuzhou 350003, China
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| Abstract: |
| Aiming at the insufficiency of oil-paper insulation aging state evaluation by the dielectric response theory, a method for diagnosing the oil-paper insulation of transformer is proposed. The differential spectral curve of transformer recovery voltage is unfolded, and the relationship between sub-curve quantity and insulation aging state as well as the relationship between relaxation time constant ratio K τ and insulation aging state are analyzed for the diagnosis of transformer oil-paper insulation aging state. The test data of multiple transformers are analyzed and conclusions are obtained: the time-domain sub-curve quantity of recovery voltage differential spectral curve changes according to the oil-paper insulation state, the more serious the oil-paper insulation aging state is, the bigger the sub-curve quantity is; and K τ can be used to diagnose the relative aging state of insulation oil to insulation paper. |
| Key words: power transformers oil-paper insulation time-domain differential unfolding relaxation response recovery voltage insulation diagnosis |
