Abstract：Frequency domain dielectric response method has been one of the most effective approaches for the condition assessment of oil-paper insulation,and the low frequency part of the response is more effective for diagnosing the moisture content and aging status of oil-paper insulation.To facilitate the using of frequency dielectric domain dielectric response in engineering,the low frequency part dielectric response of oil-paper insulation system was studied in this paper.First,the electrode polarization of insulation dielectrics (oil-gap and oil-immersed paper) was analyzed when it is applied with low frequency excitations.Then,the complex relative permittivity expressions of insulation dielectric were obtained based on conductivity,ionic mobility and other parameters.On the basis of the geometric equivalent model (XY model) of oil-paper insulation system,the complex relative permittivity expressions of oil-paper insulation system for low frequency were obtained.Finally,the validity of established expressions about dielectric constants were testified by comparing the simulated and measured results.The results show that:the calculated complex relative permittivity can fit the measured results well,and the established expressions can effectively express the low frequency part dielectric response of oil-paper insulation system.
王东阳,周利军,陈雪骄,刘伟迪,王路伽. 变压器油纸绝缘系统低频介电参数方程[J]. 电工技术学报, 2017, 32(17): 218-224.
Wang Dongyang, Zhou Lijun, Chen Xuejiao, Liu Weidi, Wang Lujia. Complex Relative Permittivity Expressions of Oil-Paper Insulation for Low Frequency Domain Dielectric Response. Transactions of China Electrotechnical Society, 2017, 32(17): 218-224.
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2017, Vol. 32 
