To study the ageing characteristics of epoxy resin composite insulation in dry-type
transformers in high-temperature environments, glass fibre-reinforced epoxy resin samples …

In this paper, the rapid aging due to Partial Discharge (PD) activity was investigated in
unaged and thermally aged oil-impregnated paper with a disk-shaped cavity between the …

Offshore wind farms pose the challenge of transmission of produced energy in an economic
and effective way over long distances, justifying investments in High Voltage Direct Current …

Ultra-high-frequency (UHF) partial discharge (PD) online monitoring is an effective way to
inspect potential faults and insulation defects in power transformers. The construction of …

The paper presents the results of the analysis on the variability of the ultra-high frequency
(UHF) signals generated by partial discharges (PD) under the long-term AC voltage. Surface …

Measurement of partial discharge (PD) is a vital method to assess the health of the electrical
insulation in high‐voltage power equipment. As diagnostic testing at very low frequency …

In comparison with the AC and DC working voltages, the effect of switching impulse voltage
on insulation is very different because of its fast-rising rate and large amplitude. This paper …

Partial discharge (PD) detection is an important method for detecting defects in power
transformers, and several PD detection methods reported in literature have their respective …

An electrical discharge that occurs at an oil/pressboard interface or pressboard surface is
called surface partial discharge. The surface discharge activity can cause irreversible …

The article presents the results of multi-variant studies of high-energy ionizing radiation
emitted by electrical discharges occurring in oil insulating systems. The studies were …