The article presents in detail the construction of a low-cost, portable online PD monitoring
system based on the acoustic emission (AE) technique. A highly sensitive piezoelectric …

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 article presents a novel on-line partial discharge (PD) monitoring system for power
transformers, whose functioning is based on the simultaneous use of three unconventional …

Pollution over insulators surfaces in outdoor environments is detrimental for long term
operation of power systems. The temporal evolution of measurement signals as the …

Electromagnetic Interference (EMI) is a technique for capturing Partial Discharge (PD)
signals in High-Voltage (HV) power plant apparatus. EMI signals can be non-stationary …

Power System components are susceptible to insulation failures due to electrical and
mechanical stresses, extreme environmental and operating conditions, material aging …

Power transformers and gas-insulated switchgear (GIS) play crucial roles in electrical power
grids. However, they may suffer from degradation of insulation material due to wear and tear …

Partial discharges measurement is one of the most useful tools for condition monitoring of
high-voltage (HV) equipment. These phenomena can be measured on-line in …

Partial discharges (PD) detection is a widely extended technique for the diagnosis of
electrical equipment. Ultra-high frequency (UHF) detection techniques appear as the best …

In this work, a comparative study of three typical denoising techniques for UHF signals from
Partial Discharge (PD) sources is carried out: Wavelet Transform (WT), Variational Mode …