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首页> 外文期刊>Thermal science >THE OIL - PAPER INSULATION RELIABILITY ESTIMATION OF 420 KV TRANSFORMER CONCERNING THERMAL STRESSES DURING EXPLOITATION CONDITIONS
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THE OIL - PAPER INSULATION RELIABILITY ESTIMATION OF 420 KV TRANSFORMER CONCERNING THERMAL STRESSES DURING EXPLOITATION CONDITIONS

机译：开采条件下考虑热应力的420kV变压器油纸绝缘可靠性估算。

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The calculating of reached ageing based on the history of loading according of International Electrotechnical Commission standard algorithm is the first task. In order to verify the obtained results, measurements of polymerization index were made on 28 paper samples taken directly from low voltage terminals (winding ends) and bus connections of the transformer under test rated 380 MVA, 2´15,75 kV/420 kV. The complete procedure of paper sample locations and taking off is described, thereby providing a manner of how this should be done, determined by specific conditions of the transformer under test. Furthermore, the determination of limit viscosity and using its relationship function with polymerization index are explained together. Comparison is made with those of liquid chromatography of oil. The results of particle sort and size analysis are shown. Finally, an estimation of the transformer life remainder is made, which is of paramount importance when defining the steps that have to be made either in revitalization process or in transformer replacement planning.
机译：首先要完成的任务是根据国际电工委员会标准算法根据负荷历史计算出达到的老化。为了验证所获得的结果，在直接从低压端子（绕组端）和被测变压器额定电压380 MVA，2´15,75 kV / 420 kV的总线连接处采集的28个纸样上进行了聚合指数的测量。描述了纸样定位和取出的完整过程，从而提供了一种应如何进行的方法，该方法由被测变压器的特定条件决定。此外，一起解释极限粘度的确定以及使用其与聚合指数的关系函数。与油的液相色谱法进行比较。显示了颗粒分类和尺寸分析的结果。最后，对变压器的剩余寿命进行估算，这在定义振兴过程或变压器更换计划中必须采取的步骤时至关重要。

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