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首页> 外文会议>2014 IEEE 18th International Conference on Dielectric Liquids >The identification of systematic error in determining the average temperature of power transformer insulation obtained by comprehensive analysis of an authentic on-site condition assessment database
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The identification of systematic error in determining the average temperature of power transformer insulation obtained by comprehensive analysis of an authentic on-site condition assessment database

机译：通过对真实的现场状态评估数据库进行全面分析，确定确定电力变压器绝缘平均温度时出现的系统误差

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摘要

The paper describes an analytical approach adopted to improve the insulation condition evaluation procedure. Electrical testing of power transformer insulation may provide reliable information about its state and aging grade. Inconveniently, the majority of dielectric parameters used in this evaluation are temperature dependent; hence, the accurate measurement of the temperature is decisive for the final assessment result. The on-site tested transformers are usually put off operation and disconnected few hours before the tests initiate and are still slowly cooling down during testing. Non stable average insulation temperature may lead to a considerable systematic measuring error. Aiming to avoid this, an authentic several years collected database was taken and a suitable emendation method applied.
机译：本文介绍了一种用于改善绝缘条件评估程序的分析方法。电力变压器绝缘的电气测试可以提供有关其状态和老化等级的可靠信息。不便的是，此评估中使用的大多数介电参数取决于温度；因此，准确的温度测量对于最终评估结果至关重要。现场测试的变压器通常在测试开始前几个小时就停止运行并断开连接，并且在测试过程中仍在缓慢冷却。不稳定的平均绝缘温度可能导致相当大的系统测量误差。为了避免这种情况，采用了一个可靠的几年收集的数据库，并采用了适当的修正方法。

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