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• W2102582005 abstract "Paragraph is about mathematical interpretation of transformer insulation system. Base of this system is composed by two elements oil and paper. We need to simulate this system for more precisely results from measurement. Section three describes how to calculate relaxation currents and how that currents are generated. So we are able to compare measured and computed values and deduce actual condition of this insulation system. Streszczenie. W artykule przedstawiono matematyczną interpretacje izolacji papierowo-olejowej transformatora. W sekcji trzeciej opisano sposob obliczania prądu rozladowującego i sposob jego generacji co pozwala na porownanie wartości pomierzonej i obliczonej i określenie stanu izolacji. (Analiza izolacji transformatora metodą PDC). The diagnostic of the transformers is important part of its operation. We need to know how system (transformer - insulation) works for running of the diagnostic system in ideal conditions. This is way to enable us to mathematic calculation for individual parameters. Mathematical calcula- tion is relatively difficult in system like transformer. We only attend to a small part of mathematical simulation of this system for this reason. We angle for simulation of the polar- ization depolarization current method. In this method we analyze generation of this currents and we shows from what the currents are made. (1) Theory bases In last few years several diagnostic techniques have been developed and used to determine the power trans- former insulation. That means this techniques must deter- mine insulator composed from transformer oil and paper in main. Named techniques are DGA (Dissolved Gas Analy- sis), DP (degree of polymerization) and Furan analysis by HPLC (High Performance Liquid Chromatography). In now- adays is possible to capture very low current involved in dielectric relaxation process. This is door open to technique like RVM (Return Voltage Measurement) or PDC (Polariza- tion Depolarization Current). Those techniques have been introduced in 90's. This measurements technique has gained popularity for its ability to assess the condition of oil and paper separately without opening the transformer tank. (2)" @default.
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• W2102582005 title "Analysis transformer insulation by PDC method" @default.
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