Open AccessAnalysis of low‐frequency polarisation behaviour for oil‐paper insulation using logarithmic‐derivative spectroscopy
Author(s) -
Liu Jiefeng,
Fan Xianhao,
Zhang Yiyi,
Lai Benhui,
Jiao Jian
Publication year - 2021
Publication title -
high voltage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.732
H-Index - 20
ISSN - 2397-7264
DOI - 10.1049/hve2.12066
Subject(s) - low frequency , frequency domain , logarithm , spectroscopy , novelty , conductance , moisture , derivative (finance) , transformer , transformer oil , frequency analysis , analytical chemistry (journal) , materials science , acoustics , mathematics , computer science , physics , chemistry , electrical engineering , engineering , mathematical analysis , composite material , telecommunications , chromatography , condensed matter physics , voltage , economics , philosophy , theology , quantum mechanics , financial economics
Abstract The low‐frequency polarisation information of oil‐paper insulation could be easily obscured by the conductance effect, and the contained polarisation information thus can not be readily extracted from the frequency domain spectroscopy (FDS). Given this issue, an alternative idea is reported to extract the low‐frequency polarisation information by using logarithmic‐derivative spectroscopy (LDS). The present findings proved that the parameters extracted by using the LDS can be applied for studying the low‐frequency polarisation behaviour under the moisture effect. In that respect, the novelty of this work is in the exploration of the LDS as a potential tool to extract feature parameters for analyzing the low‐frequency polarisation information of transformer oil‐paper insulation.