Translated Title
Application of parallel-series equivalent circuit in aging diagnosis for oil-paper insulation
Translated Abstract
In order to overcome the limitation of conventional circuit in the aging diagnosis of oil-paper insulation , this paper introduces the parallel-series equivalent circuit model which can reflect the polarization responses of oil-paper insulation medium and be used in the analysis of aging diagnosis .Based on extended Debye model, the hy-brid branch was joined to reflect the complex interface reaction , and the mathematical model of the parallel-series circuit parameters’ identification was proposed.Through the return voltage tester RVM5461, the validity of paral-lel-series circuits and the number of parallel-series branch is analyzed .The results show that the parallel-series cir-cuit can truly reflect the polarization characteristics of oil-paper insulation and the polarization spectrum of parallel-series circuit and measurement coincide with higher degree than that of extended Debye model .The number of par-allel-series branch will increase with the more aging serious of transformer .Therefore, the parallel-series equivalent circuit is one of effective means in the assessment of oil-paper insulation aging status.
Translated Keyword
aging diagnosis
numbers of the parallel-series branches
oil-paper insulation
parallel-series equivalent circuit
return voltage
Access Number
WF:perioarticaldzclyyqxb201503011
