Results 41 to 50 of about 1,502,407 (287)

Partial Discharge Monitoring in Power Transformers Using Low-Cost Piezoelectric Sensors

Sensors, 2016
Power transformers are crucial in an electric power system. Failures in transformers can affect the quality and cause interruptions in the power supply.
Bruno Castro, Guilherme Clerice, Caio Ramos, André Andreoli, Fabricio Baptista, Fernando Campos, José Ulson   +6 more
doaj   +1 more source

Performance Evaluation of Outdoor High Voltage Glass Insulators in High Pollution Industrial Areas Using Simulated Acid Rain Contamination

IEEE Access, 2022
A suitable, non-standard method for artificial pollution testing using simulated acid rain pollution in a laboratory was developed in this work. The method is applicable to a wide range of climatic conditions and rain acidities.
Chibuike Ilomuanya, Shahab Farokhi, Azam Nekahi   +2 more
doaj   +1 more source

Continuous online monitoring of partial discharges in high voltage cables

, 2004
This paper reviews data acquisition, transmission and processing methodologies for continuous online monitoring of partial discharges in power cable systems.
Tian, Y., Sutton, S.J., Lewin, P.L., Swingler, S.G., Wilkinson, J.S.   +4 more
core   +1 more source

Partial discharges measurement by UHF method [PDF]

Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2020
The unconventional UHF (Ultra High Frequency) method of measuring partial discharges (PD) is based on measuring electromagnetic waves (EM) in the UHF frequency band (300-3000) MHz, using appropriate antennas.
Malešević Nevena, Žarković Mileta, Ilić Denis, Jovanović Đorđe   +3 more
doaj  

Simulation of Current Pulses and Sound Waves Resulting from Partial Discharges in a Needle-Plane Geometry in Air

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2022
Partial discharges can occur in different types of electric equipment and cause progressive insulation deterioration, so there is interest in monitoring partial discharges for assessing the state of the isolation of an electric system and to predict ...
Luís Victor Muller Fabris, Jean Carlos Cardozo da Silva   +1 more
doaj   +1 more source

A Study of the Cleansing Effect of Precipitation and Wind on Polluted Outdoor High Voltage Glass Cap and Pin Insulator

IEEE Access, 2022
In this work, the extent of natural cleansing effect of rainfall, wind and fog or a combination of these on an insulator string were investigated. Results showed that pollution losses progress with time, with a considerable fraction of losses occurring ...
Chibuike Ilomuanya, Azam Nekahi, Shahab Farokhi   +2 more
doaj   +1 more source

A measurements-based discharge location algorithm for plain disc winding power transformers [PDF]

, 2005
A measurements-based electrical method for locating partial discharges (PD) in transformers is described in the paper. This location method relies on the series resonance frequencies of the signals produced at the transformer terminals by a discharge on ...
Wang, Zhongdong D., Crossley, P.A., Crossley, Peter A., Hettiwatte, Sujeewa N., Hettiwatte, S.N., Wang, Z.D.   +5 more
core   +1 more source

Generation of critical acoustic pulses in high-voltage insulators due to induced fields of partial discharges

Известия высших учебных заведений: Проблемы энергетики, 2023
THE PURPOSE of the article is to discuss an updated survey of the technical condition of porcelain high-voltage insulators of the type IOS 110/400, which had defects with partial discharge intensities above 4 nC, at Tatenergo substations. The experiments
V. A. Golenishchev-Kutuzov, A. V. Golenishchev-Kutuzov, A. V. Semenikov, G. D. Mardanov, R. I. Kalimullin, D. A. Ivanov   +5 more
doaj   +1 more source

Statistical Analysis of Partial Discharge Characteristics in Transformer Oil at the “Point-Plane” Electrode at Alternating Voltage [PDF]

Problems of the Regional Energetics, 2017
In this paper, we consider the problems related to measuring and analyzing the characteristics of partial discharges which are the main instrument for oil-filled high-voltage electrical equipment diagnosing.
Korobeynikov S.M., Bychkov A.L., Chimitova E.V., Demin V.A.   +3 more
doaj  

Comparative Tests of Partial Discharges in Nomex^® 910 Paper and Cellulose Paper

Energies, 2020
The article presents the results of comparative investigations of partial discharges in two insulation systems; aramid-enhanced cellulose paper-mineral oil, and pure cellulose paper-mineral oil. Partial discharges were investigated in a diagonal electric
Hubert Moranda, Hanna Moscicka-Grzesiak, Piotr Przybylek, Krzysztof Walczak, Radoslaw Szewczyk   +4 more
doaj   +1 more source