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OPTIMIZATION OF POWER TRANSFORMERS WITH GRADED INSULATION
Zbornik radovaThe insulation system plays a key role in the safe and reliable operation of all electrical machines, especially when it comes to power transformers. It is designed to ensure the durability of the transformer against dielectric and thermal stresses under various ambient and operating conditions.
Milan Ćelović +4 more
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Alternative electrical insulating fluids in power transformers
Proceedings of the 2014 15th International Scientific Conference on Electric Power Engineering (EPE), 2014Mineral oils are traditionally used in transformer insulation systems. As they are uneasily biodegradable, they have negative influence on environment, when transformer failure happens. There are also alternative electrical insulation liquids, which may help in some areas, however their properties may not fulfill the all requirements.
Michal Svoboda, Pavel Trnka
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High-voltage power-transformer insulation
Proceedings of the Institution of Electrical Engineers, 1963The increase in transmission system voltages in recent years to 500 kV, with even higher prospective values, makes the internal insulation a large proportion of the transformer cost and therefore economically more important. The associated increase in MVA rating, and hence in size and weight, has reached beyond transport limits and demands better ...
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Optimisation of End Insulation Design in Power Transformer
Asian Journal of Electrical Sciences, 2012The power transformer is an important component in power system that must be highly efficient and reliable in peration. Insulation design in power transformer is one of the important factors for determining reliability and size. It is essential to find a compact optimal design for insulation that satisfies the technical specifications with minimum ...
R. Beema Thangarajan, S. Usa
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Testing Methods for Power Transformer Insulation
IEEE Transactions on Electrical Insulation, 1986Long-term test of alternating current voltage in power transformers greatly contributes ot the improvement of the reliability of insulation. Many kinds of V-t characteristics are collected by experimental research, and typical V-t characteristics of a whole transformer insulation are discussed in the paper.
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High voltage power transformer insulation design
2011 Electrical Insulation Conference (EIC)., 2011The large power transformer life span depends heavily on insulation — its condition, materials, composition, geometry, etc. The high voltage transformer insulation requires a very focused analysis in the design stage. The large power transformer is subjected to different overvoltages during factory testing and in operation, therefore all resulting ...
W. Ziomek +4 more
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Diagnostic Methods for Power Transformer Insulation
IEEE Transactions on Electrical Insulation, 1986Concerning diagnostic methods for power transforme. r ins-ulation , gas analysis in oil and partial discharge measurements become useful methods, Typical methods are described in this chapter.
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The insulation requirement of the minor winding of power transformer
2016 International Conference on Signal Processing, Communication, Power and Embedded System (SCOPES), 2016A transformer is one of the key equipment in modern power system. It is used to raise the voltage levels from few kV's i.e. from the generating levels to a very high transmission level of 400kV, 765kV. Higher voltages are important for the efficiency and reliability of the electrical transmission system as higher voltages results in less losses in ...
Babita Nanda +3 more
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Novel systems for the upgrading of power transformer insulations
Proceedings of 2002 IEEE 14th International Conference on Dielectric Liquids. ICDL 2002 (Cat. No.02CH37319), 2003Although solid and gaseous insulations have become increasingly popular during the last decades the application of insulating liquids together with a solid insulant immersed therein is still essential for some kinds of applications like power transformers.
V. Wasserberg +3 more
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Ester insulating liquids for power transformers
2012The properties of ester insulating liquids, including both synthetic and natural esters, offer the potential for transformers with lower fire risk and greater environmental compatibility when compared with those filled with mineral oil. This potential has led to intensive studies of the electrical and thermal performance of ester liquids in recent ...
Wang, Z. D. +11 more
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