湿度和抗静电添加剂对变压器板影响的介电测量

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI:10.1109/CEIDP.1997.634600

Y. Du, M. Zahn, B. Lesieutre

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引用次数: 17

摘要

固体绝缘中的水分对变压器的寿命有不利影响。当系统处于非平衡状态时，采用多波长间数字传感器进行的附加频率-波数(/spl ω /-k)介电测量技术是测量固体绝缘中与水分分布直接相关的复介电常数分布的有效方法。介绍了利用数字间传感器随环境湿度变化对无油和浸渍纸板进行测量的方法。将现有的油纸系统水分平衡曲线与实验结果进行了比较。对油中抗静电添加剂进行了测试，并讨论了介电效应。

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Dielectrometry measurements of effects of moisture and anti-static additive on transformer board

Moisture in solid insulation has detrimental effects on transformer life. When the system is not in equilibrium laboratory measurements with multiple wavelength interdigital sensors using the imposed frequency-wavenumber (/spl omega/-k) dielectrometry technique have proved to be an effective way to measure complex permittivity distribution in solid insulation which is directly related to the moisture distribution. Measurements of oil-free and oil-impregnated pressboard using interdigital sensors with changes in ambient moisture concentration are presented. A comparison between existing moisture equilibrium curves for the oil-paper system and experimental results is given. Measurements are also performed for anti-static additive in oil and the dielectrometry effects are discussed.

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IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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