Validation of diagnostic monitoring technical state of iron and steel works transformers

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 unit transformers are distributed according to the operation durability. The study provides dependencies of the specific damage rate and registers their dependencies on provisions of the theory considering failures of the process systems. It determines characteristic failures of the network and unit transformers. There is a list of process disturbances accompanied by internal short circuits. It is proved that most damages appear in the windings and at the high-voltage inputs. The paper takes a look at issues of technical- and-economic efficiency of commercialization of diagnostic monitoring systems. Expenditures for complex inspection and introduction of the stationary system are compared. The study provides evidence to the fact that efficiency of accident prevention and reduction of corresponding losses are significantly higher due to the use of the monitoring systems compared to the routing inspections. It specifies results of introduction of the systems for continuous condition control of network, unit and furnace transformers at OJSC Magnitogorsk Iron and Steel Works. There is a challenge to develop the engineering practice for failure detection and identification.