Diagnostic of power transformers are in service long time
Journal Title: Вісник Національного технічного університету "ХПІ". Серія: Проблеми удосконалювання електричних машин і апаратів. Теорія і практика - Year 2018, Vol 32, Issue 1308
Abstract
Purpose. Improvement of power transformer condition diagnostic being in service long time. Methodology. The theoretical aspects of the paper are based on theory fundamental statements of electrical apparatus and material engineering. Experimental investigations were real-ized by monitoring data incisive analysis of capacitor (С) and approximate power factor (tgδ) of autotransformer bushing 550 kV on operating equipment. Results. Results and observational analysis are given. They show that power transformer diagnostic recommended methods in operation do not be able to in full detect defects with accumulative character appearing during a continuous exploitation peri-od. Originality. In addition to the existing methods of power transformers diagnostic to use a technique based on the registration of par-tial discharges is proposed. It allows detecting insulation defects at early stages of development. Due to the fact that current value of parti-cle discharges is not large especially in the initial stages, it make sense for studding of partial discharges in transformer insulation to fix electrical field and acoustic signals generating partial discharges. Practical value. Practical value for electrotechnical branch is improve-ment diagnostic and enhancement of safety of substation equipments exploitation.
Authors and Affiliations
O. G. Volkova, L. B. Zhorniak, I. V. Lyevyenkov
Keywords
Related Articles
- EP ID EP435013
- DOI 10.20998/2079-3944.2018.32.01
- Views 136
- Downloads 0
To the question of improving the quality of internal insulation of high-voltage measurement transformers
In this paper, the issues of increasing the reliability of electrical insulation of high-voltage measuring transformers, which are in operation in various power supply systems, and methods for increasing the service life...
The system of optimal control of the motion of a traction unit with synchronous motors on permanent magnets
An approach is proposed to automatic control of the speed of traction unit with synchronous motors on permanent magnets containing starter windings, which is based on the use of reduced–order observers. An equation of Lu...
The calculation of the motion of charged particles in crossed fields
The results of the calculation of the motion of charged particles in crossed electric and magnetic fields in particle approximation are shown. The parameters of magnetic and electric fields of installation for charged pa...
Features of induction heating of a massive metal billets by inductors with ferromagnetic cores
There has been conducted an analysis of electromagnetic processes in the system “inductor with a ferromagnetic core – a massive metal billet”. The electrodynamic problem was solved by the Maxwell’s equations integrating...
Optimal control of the work of the hybrid electric energy system with renevable sources of energy
Were developed an optimal system of automatical control for mode of hybrid electric power supply system with renewable energy sources, that let increase the maximal active power generation level in the case when were mai...