Industrial Tests of Current Distribution Dynamics in the Brush-Contact Apparatus of the Turbo-Generator

Abstract

The article is devoted to analysis of the results of industrial tests of current distribution dynamics in the brush-contact apparatus of the turbo-generator TVV-800 (800 MW) using a microprocessor based monitoring system. New methods of assessing the quality of current-collecting devices functioning is developed, allowing to assess current transfer in dynamics and to determine their quality characteristics. New trends of current distribution dynamics between the parallel brushes that allow on the basis of statistical and variance analysis to develop practical recommendations for maintenance of these devices are revealed. The results of the research in the form of scientific articles are published for the first time.

Machine Learning and q-Weibull Applied to Reliability Analysis in Hydropower Sector

“…(4)) is the inverse function of the q-exponential, the Eq. 7is written as y = βx + b, with y = ln − ln 1 2…”

“…Heating of the parts in contact, sparks, and arcs are common in the transmission of electric current by sliding contact. The mechanical vibration of the sliding contacts and the wear lead to an unbalanced distribution of the electric current between the contacts (brushes), overcurrents and thermal overloads result in decreased reliability of the contact device with the brushes [1]. Excessive brush wear is a problem in many hydroelectric plants.…”

“…Otherwise, after some time, there will be an overload on some brushes and the unloaded condition on the others. This can increase brush wear, overheat, and damage the contact pairs and the entire cassette [1]. Several brushes are connected in parallel to obtain the current required for operation.…”

“…The two interactions of competition and cooperation between brushes together ( [1], [2]), the influence of the surface structure involved in wear [8], and the apparent scale invariance mentioned in [9] seem to suggest that there is a complex behavior in the brush wear.…”

Diagnostics and Forecasting of the Turbo-generators Sliding Current Collection Units Technical Condition

“…The stationary diagnostic systems was designed: "Iskra", "Obzor", "Relief", "Signal" [6][7][8][9][10][11][12][13], which provide information about the functioning quality of the SCCU TG.…”