The high voltage power transformer is the critical element of the power system, which
requires continuous monitoring to prevent sudden catastrophic failures and to ensure an …

This paper reviews the main features of acoustic emission technique. First, the
characteristics of acoustic signals and their physics are addressed. Then, the structure of …

The acoustic emission (AE) technique is one of the unconventional methods of partial
discharges (PD) detection. It plays a particularly important role in oil-filled power …

The detection of partial discharge (PD) activities in high-voltage equipment can be
conducted according to several mechanisms of signal detection, including electromagnetic …

Power transformers are an indispensable equipment in power transmission and distribution
systems, and failures or hidden defects in power transformers can cause operational and …

Three Hilbert fractal antenna designs are proposed in this work to capture and classify
common types of partial discharge (PD) in an oil insulated system. Each antenna design …

The lifetime of a cast-resin transformer mainly depends on the condition of insulation
material. Partial discharge (PD) is an important reason for insulation deterioration in cast …

Clear images captured under transformer oil are crucial data sources for internal fault
diagnosis of oil-immersed transformers. However, images captured under transformer oil …

To solve the problems of low resolution, weak antinoise performance, and imprecise fault
location in discharge recognition of ultraviolet imaging, an intelligent state recognition …

In this paper, the research methodology and the results of the analysis carried out using the
acoustic emission (AE) and thermal imaging for a selected oil power transformer are …