糠醛浓度判断变压器绝缘纸寿命的综述

被引：15

作者：

J.M.K.MacAlpine

张潮海

机构：

[1] 香港理工大学电机系

来源：

高电压技术 | 2001年 / 04期

关键词：

变压器; 糠醛浓度; 老化; 绝缘纸;

D O I：

10.13336/j.1003-6520.hve.2001.04.026

中图分类号：

TM411.2 [];

学科分类号：

摘要：

变压器油中糠醛浓度 ρ(C5H4 O2 )是绝缘纸老化程度的重要指标。实验证实了绝缘纸的拉伸强度与聚合度(DP)呈线性关系 ,ρ(C5H4 O2 )对数值与DP呈负线性关系 ,可使用高性能的液相色谱分析仪测 ρ(C5H4 O2 ) ,以判断绝缘纸的老化程度。水会加快绝缘纸中纤维链的断裂速度 ,而水又是绝缘纸老化过程中的生成物之一 ,故形成了绝缘纸老化的自催化 (正反馈 )过程 ,变压器各部分的温差使老化过程更加复杂。短期内 (几个月 ) ρ(C5H4 O2 )的显著变化表明变压器内部存在隐患并引发故障的概率相当大 ,故定期检测变压器中 ρ(C5H4 O2 )十分必要。

引用

页码：63 / 64+67 +67

页数：3

共 11 条

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