变压器油中敏感的低场克尔电光测量

1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1988-10-16 DOI:10.1109/CEIDP.1988.26354

D. Sheen, T. Fujiwara, M. Zahn

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引用次数: 6

摘要

采用频率选择放大器，将小信号交流电压叠加在直流电平上，进行灵敏的克尔电光场映射测量。使用几种不同的电极材料，包括黄铜，不锈钢和铝，作者已经观察到由于正空间电荷在400 μ C/m/sup /数量级上引起的非常显著的场畸变水平。可以测量低至100 V/cm的场强，典型的平均场强测试范围为500 V/cm至29 kV/cm。测量了这些场的瞬态演化，显示了在60 s >量级的时间尺度上从均匀场到高度不均匀场的转变

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Sensitive low field Kerr electro-optic measurements in transformer oil

A frequency-selective amplifier was used to make sensitive Kerr electro-optic field mapping measurements with a small signal AC voltage superimposed on a DC level. With several different electrode materials, including brass, stainless steel, and aluminium, the authors have observed very significant levels of field distortion due to positive space charge on the order of 400 mu C/m/sup 3/. It was possible to measure field strengths as low as 100 V/cm with typical average field strengths tested over the range of 500 V/cm to 29 kV/cm. The transient evolution of these fields was also measured, showing the transition from a uniform to a highly nonuniform field on a time scale on the order of 60 s.<>

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来源期刊

1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena

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