Express diagnostics of power oil transformers by vibroacoustics and partial discharges

Abstract

This article presents the results of Express Diagnostics conducted in the working state of the autotransformer ATDTN-125000/220/110-U1. Three measurement pribors were used in the research process to determine the vibroacutic, partial discharge, and current strength values in the working state of the oil power transformer. Experimental studies and their analysis have shown that by evaluating the technical condition of the oil power transformer at a short opportunity, it is possible to give a conclusion to its ecpluation or release into repair.

Development of a simulation model for assessing the technical condition of the magnetic circuit of oil power transformers by measuring the temperature of the tank and the external environment

“…Using fuzzy logic, membership functions were determined for input (Tables 1 and 2) and output (Table 3) variables using T, L, γ -classes. The rules of dependence between input and output variables have been Using the centering method for the process of obtaining the output result is defined as: (22) Baking and ambient temperatures are determined based on experimentation. Active power losses at idle, active power losses under load, rated power, high and low voltage, tank temperature and external temperature parameters; according to the established methodology, the magnetic circuit of the oil power transformer makes an express assessment of the technical condition.…”

Development of a simulation model for assessing the technical condition of oil power transformers by measuring vibroacoustic parameters

“…They play a fundamental role in the transmission, conversion and distribution of electricity [1,[14][15][16]. Extending the life of these devices is a priority to ensure reliable and stable power supplies [18][19][20][21][22][23][24]. In this context, diagnostics of oil-based power transformers plays an important role [8,22,[25][26][27].…”