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As the population of transformers in service increases and becomes older, more attentions are focused on their availability and reliability. Through decades' progress, it is undeniable that considerable advances have been achieved on the techniques of fault diagnosis and condition assessment for oil-immersed transformer, for its great importance in the whole transmission and distribution (T&D)...
Based on the platform designed for thermal aging test of oil-paper insulation system, the problem of thermal aging of solid insulation used in the oil-paper insulation of power equipment has been studied. The method of Frequency Domain Spectrum (FDS) has been applied to obtain frequency domain dielectric response properties of oil immersed paper insulation, and an unscrambling method according to...
Oil-paper is widely used as a good-performance insulating material in power transformers. The dielectric properties of oil-paper insulation play an important role in the reliable operation of power transformers. And the formation, distribution and mobility of space charge will affect its dielectric performance. The space charge behavior in dielectrics is known to be influenced by many factors, such...
To investigate the effect of temperature on the frequency domain spectroscopy (FDS) test results of transformer oil-paper insulation and for accurately assessing the aging condition and moisture content in pressboard, FDS experiments are performed on the oil-impregnated pressboard sample at different temperatures. The temperature effect on the dissipation factor tanδ, real capacitance C′ and imaginary...
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