通过耐压试验预测环氧树脂和减薄纸绝缘变压器绕组的寿命

Q. Zhuang, P.H.F. Morshuis, D. Djairam, J. J. Smit
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引用次数: 1

摘要

本文研究了输电变压器绕组导线间环氧树脂涂布纸油绝缘。在环氧树脂层和完全绝缘上分别进行了耐压试验。测试结果揭示了环氧树脂层的电压与寿命特性,进一步支持了对完全绝缘的寿命预测。预测的寿命保证了所研究的绝缘设计的可靠性,并进一步提出了减小纸绝缘层厚度的可能性。
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Life prediction for transformer winding insulated with epoxy resin and thickness-reduced paper through voltage endurance tests
This paper investigates the epoxy resin coated paper-oil insulation between windings wires of a transmission power transformer. Voltage endurance test has been performed separately on the epoxy-resin layer and on the complete insulation. The test result reveals the voltage vs. lifetime characteristics of the epoxy resin layer, which further supports the life prediction on the complete insulation. The predicted lifetime ensures the reliability of the investigated insulation design and further suggests the possibility to reduce the thickness of the paper insulation layer.
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