非环烷基变压器油和环烷基变压器油宽频介电频谱对比分析

Contrastive Analysis of Frequency Domain Spectroscopy of Non-naphthenic and Naphthenic Transformer Oil

为了研究油浸式变压器中的变压器油对宽频介电频谱(FDS)的影响,在-10、20、50、80℃温度条件下,对非环烷基和环烷基变压器油进行10-1~106 Hz频率范围内的介电频谱测试。采用修正后的H-N方程对测试结果进行拟合,得到相关拟合参数,同时结合介电频谱的变化趋势分析不同变压器油对宽频介电频谱的影响。结果表明,随着温度的升高、频率的降低,环烷基变压器油的介电常数实部的升高速度快于非环烷基变压器油,且其松弛极化时间比非环烷基变压器油受温度的影响更大。

In order to investigate the impacts of different transformer oil used in oil-immersed transformers on FDS, we selected non-naphthenic and naphthenic transformer oils for FDS tests under -10, 20, 50, and 80 ℃ with frequency ranging from 10^-1 to 10^6 Hz. Then we obtained the related parameters after matching the test results with revised H-N equations, and analyzed the influences of various transformer oil on FDS in combination with the trend of FDS. The re- suits show that the real part of naphthenic transformer oil permittivity rises faster with increasing temperature and reducing frequency, and its relaxation polarization time is more susceptible to temperature compared with that of non-naphthenic transformer oil.