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Moscow, Russia

L'Vov S.Yu.,LLC Presselektro | Komarov V.B.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | Bondareva V.N.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | Seliverstov A.F.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | And 3 more authors.
Power Technology and Engineering | Year: 2011

The results of a measurement of the contamination of the oil in 66 transformers by metal-containing colloidal particles, formed as a result of the interaction of the oil with the structural materials (the copper of the windings, the iron of the tank and core etc.), and also the results of measurements of the optical turbidity of the oil in 136 transformers when they were examined at the Power Engineering Research and Development Center Company are presented. Methods of determining the concentration of copper and iron in transformer oil are considered. The limiting values of the optical turbidity factors, the copper and iron content are determined. These can serve as a basis for taking decisions on whether to replace the silica gel of the filters for continuously purifying the oil of power transformers and the shunting reactors in addition to the standardized oil contamination factors, namely, the dielectric loss tangent and the acidity number of the oil. © 2011 Springer Science+Business Media, Inc.


L'vova M.M.,nter at Federal Grid Company of the Unified Power System | L'vov S.Y.,LLC Presselektro | Lyut'ko E.O.,nter at Federal Grid Company of the Unified Power System | Vdoviko V.P.,EMA Inc. | And 5 more authors.
Power Technology and Engineering | Year: 2015

Methods of increasing the operating reliability of power transformers, autotransformers and shunting reactors in order to reduce the risk of damage, which accompany internal short circuits and equipment fires and explosions, are considered. © 2015 Springer Science+Business Media New York


L'vova M.M.,nter at Federal Grid Company of the Unified Power System | L'vov S.Y.,LLC Presselektro | Komarov V.B.,Russian Academy of Sciences | Lyut'ko E.O.,nter at Federal Grid Company of the Unified Power System | And 6 more authors.
Power Technology and Engineering | Year: 2015

Methods of increasing the operating reliability of power transformers, autotransformers and shunting reactors in order to reduce the risk of damage, which accompany internal short circuits and equipment fires and explosions, are considered. © 2015, Springer Science+Business Media New York.


L'Vov S.Y.,LLC Presselektro | Lyut'Ko E.O.,R and nter for Power Engineering | Bondareva V.N.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | Komarov V.B.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | L'Vov Y.N.,R and nter for Power Engineering
Power Technology and Engineering | Year: 2012

The radiational-thermal development of coil short circuits due to the action of partial discharges of the first kind when the windings of transformers, autotransformers and shunting reactors become contaminated with metal-containing colloidal particles, formed in the transformer oil as a result of the interaction of the oil with the constructional materials (the copper of the windings, the iron of the tank, the core etc.) is considered. Acriterion of dangerous contamination of the coil insulation of the windings by metal-containing colloidal particles is proposed, namely, 3% of the mass content of copper and iron in it, which, if exceeded, may serve as a basis for recognizing the state of transformers, autotransformers and shunting reactors at a voltage of 110 kV and above the limit. It is shown that filters for continuously cleaning the oil play a considerable role in prolonging the life of transformer equipment. © 2012 Springer Science+Business Media, Inc.

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