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There is a strong growths of equipment fleet with expired specified standard service life in Russia. Substations equipment repair is necessary for no-break power supply to consumers. Optimal selection of equipment to be removed out of service leads to the whole power supply system reliability improvement. Equipment state assessment is an important task for determination of elements which fail to meet...
The paper emphasizes the relevance of control of power transformers performance of the auxiliary industrial power stations without deenergization. It provides evidences that occurrence of partial discharges (PD) in the insulation indicates fault inception. Accordingly, the PD detection is one of the most promising methods of the diagnostic monitoring. The paper focuses attention on the problems resulting...
By the example of OJSC Magnitogorsk Iron and Steel Works, the paper considers the issues of introduction of systems designed for diagnostic monitoring technical state of transformers. It highlights the need for life extension and managing priorities at renovation of power equipment. It gives an estimate of the most deteriorated transformers differing in the levels of supplied voltage. Network and...
In the work were investigated optical, electrical and mechanical properties and heat stability of the components of paper-impregnated insulation of power transformers. It is established that Increase of sorption activity of cellulosic material can slow process of destruction of the liquid dielectric due to retention of the products of aging of paper and oil The spectral transmission characteristics...
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