Diagnosis of transformer insulation condition using recovery voltage measurements

Proceedings. National Power Engineering Conference, 2003. PECon 2003. Pub Date : 2003-12-15 DOI:10.1109/PECON.2003.1437467

Mohd Aizam Talib, NoorAzlan Mohd Ghazali, Melvin Christie, Wan Zakaria, Ismail Hashim, Shahan om Uthman, Mohammad Nor Jamali

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引用次数: 10

Abstract

Moisture is one of the factors that cause transformer insulation degradation. The detection of moisture in oil and paper insulation is crucial in determining the health of transformer insulation system. High moisture content severely degrades the insulating strength of oil and paper and may eventually cause failure. In recent years, new diagnostic and monitoring techniques have been promoted to complement the classical insulation resistance, power dissipation factor and polarization index measurements. The new test method described in this paper is based on analysis of the polarization spectrum traced from the results of recovery voltage measurements (RVM). This method makes possible assessment of the condition of oil/paper insulation system. This paper shows some applications of RVM for determining the moisture level in the power transformers. The possible use of this method as a diagnostic tool for evaluates ageing trends or actual state of insulation is also discussed.

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用恢复电压测量诊断变压器绝缘状况

湿气是引起变压器绝缘劣化的因素之一。绝缘油和绝缘纸中水分的检测是确定变压器绝缘系统是否健康的关键。高含水量严重降低油和纸的绝缘强度，并可能最终导致失效。近年来，新的诊断和监测技术被推广，以补充经典的绝缘电阻、功耗因数和极化指数测量。本文描述的新测试方法是基于对恢复电压测量(RVM)结果跟踪的偏振谱的分析。该方法使对油/纸绝缘系统状态的评价成为可能。本文介绍了RVM在电力变压器含水率测定中的一些应用。还讨论了这种方法作为评估老化趋势或绝缘实际状态的诊断工具的可能用途。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings. National Power Engineering Conference, 2003. PECon 2003.

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