Translated Title
The Research of Micro Water Content of Oil-paper Transformer Based on Relaxation Response Equivalent Circuit Method
Translated Abstract
Water is the ＂enemy Number One＂ that impacts the aging condition of oil-paper insulation transformer,so it is of great significance to analysis the transformer’s aging and damp condition with the method of diagnosing the micro water content of the transformer accurately.In this paper,by applying oil-paper insulation transformer relaxation response equivalent circuit and the characteristics of the Return Voltage polarization spectrum,combined with the artificial intelligence algorithms to identify the equivalent circuit parameters accurately,and discussed the relationship between the micro water content and equivalent circuit parameters further,we have come up with an important conclusion that the larger the parameters of the large time constant circuit,the fewer the water content of the transformer is.At the same time,it aids us to judge the damp conditions of the transformer by comparing the variation of insulation resistance and geometric capacitance.At last,we verify the correctness of this conclusion by the examples of field test.
Translated Keyword
equivalent circuit parameters
micro water content
Oil-paper insulation
transformer
Conference Name
福建省科协第十三届学术年会分会场——福建省电机工程学会第十三届学术年会
