中文摘要：

为了研究植物绝缘油在变压器等充油高压电气设备中的应用，分析了精炼处理后菜籽绝缘油的主要介电性能，并进行了试验研究和理论分析，采用介电谱测试仪测量了菜籽绝缘油试品的相对介电常数和介质损耗因数，分析了两性能参数随试验温度、频率变化的规律，并参照相关标准对菜籽绝缘油的体积电阻率进行了研究。同时，测试了。25矿物绝缘油相应的介电性能参数。通过比较分析两类绝缘油介电性能参数温度谱、频率谱的试验结果发现，相对于矿物绝缘油，植物绝缘油具有良好的介电性能。

英文摘要：

In order to research the application of vegetable-oil-based insulating oils, dielectric properties of a type of refined insulating rapeseed-oil were studied by experiment and theoretical analysis. Relative permittivity and dissipation factor of this insulating oil were measured using a dielectric spectrometer. The characteristics of these two parameters versus temperature and frequency were analyzed. Furthermore, volume resistivity of the rapeseed insulating oil specimens was tested according to relevant standards. Meanwhile, the ^# 25 mineral insulating oil was tested under the same conditions. In comparison of the temperature chart and frequency spectra of the dielectric property parameters, it is concluded that the insulating rapeseed-oil possesses greater dielectric properties than mineral insulating oil.