在从损坏的电力变压器出来的压板上测量油通电

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI:10.1109/CEIDP.1999.807924

E. Moreau, T. Paillat, G. Touchard

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引用次数: 2

摘要

在大功率变压器中，电气绝缘需要压板和油。另一方面，油也被用作系统的冷却剂。在油压界面处发生的流动起电过程似乎是由放电事件引发的。我们最近对油流通过不同压板产生的电气化的研究表明，人工放电对压板降解有影响。因此，本实验研究的目的是测量和比较用全新的压板样品和来自损坏的电力变压器的压板获得的对流空间电荷密度值。同时分析了添加剂苯并三唑1-2-3对油品性能的影响。结果表明，由于改变了压板-油界面的交换过程，从损坏的电力变压器中获得的压板样品引起了流电导率的大幅增加。另一方面，增加BTA可以显著减少流量电气化。

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Oil electrification measured on a pressboard coming from a damaged power transformer

In high power transformers, pressboard and oil are required for electrical insulation. On the other hand, the oil is also used as a coolant of the system. The flow electrification process occurring at oil-pressboard interface seems to be initiating on electrical discharge incidents. Our recent investigations of electrification generated by an oil flow through different pressboards showed an influence of the pressboard degradation by artificial electrical discharges. Consequently the goal of this experimental study is to measure and to compare the convected space charge density value obtained with a brand new pressboard sample and with a pressboard coming from a damaged power transformer. The influence of an additive (BTA benzotriazol 1-2-3) in oil is also analyzed. The results show that the pressboard sample obtained from the damaged power transformer induces a high increase of flow electrification due to a modification of the exchange process at the pressboard-oil interface. On the other hand, an addition of BTA permits to reduce significantly flow electrification.

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来源期刊

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)

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