Owing to their vital function and high cost, oil-immersed power transformers represent key
links in electricity grids. While extensive effort has been invested by industry in developing …

The transformer thermal performance is a crucial issue that should be considered in the
design stage. Recently, natural and synthetic ester oils have been proposed as …

已有的变压器匝间短路辨识方法主要依据绕组电流, 阻抗或者油中溶解气体等单一类型信号,
难以实现对故障位置的准确诊断, 特别对少量匝数短路的辨识效果较差. 综合考虑绕组电流 …

This contribution presents the early results of a R&D collaboration established between the
University of Cantabria and the Power Transformer Manufacturer EFACEC. This paper tests …

In this paper, a precious analysis is dedicated to thermal properties of three metal oxide-
based nanofluid samples as well as their overall effects on a 630 kVA oil natural-air natural …

The high frequency transformer (HFT) applied in the power electronics operate under the
combined stresses of high-frequency pulsewidth modulation (PWM) voltage and high …

Traditional monitoring methods cannot obtain the overall thermal information for power
transformers. To solve this problem, a distributed fiber optic sensor (DFOS) was creatively …

The temperature of windings hot spot is a factor affecting the load capacity and useful life of
power and distribution transformers. It is the hottest point of transformer in terms of design …

The existing methods of interturn fault diagnosis of a power transformer depend on the
single signal indicator such as the winding current, the impendence or the dissolved gases …

The liquid flow and temperature distributions in oil natural (ON) cooled power transformer
windings are of great importance for thermal design, thermal rating and life estimation of ON …