Results 31 to 40 of about 30,911 (308)

Analysis of Partial Discharge Activity for Evaluation of the State of High Power Electric Generators Stator Windings [PDF]

Problems of the Regional Energetics, 2016
The paper shows the importance of trending of partial discharge activity in assessing the insulation condition. It is presented the principle of the measurement method and the quantities that characterize partial discharges and also the criteria utilized
Dumitrescu Sorin
doaj  

Measurement of Partial Discharge Activities within Two Artificial Spherical Voids in an Epoxy Resin [PDF]

, 2011
Measurement of partial discharge activities within insulation systems has been extensively performed. It has been widely used in the performance assessment of an insulation system and for insulation diagnostics.
Illias, H A, H. A. Illias, G. Chen, Lewin, P L, Chen, G, P. L. Lewin   +5 more
core   +1 more source

Partial Discharge Behaviour within Two Spherical Cavities in a Dielectric Material [PDF]

, 2011
In high voltage insulation systems, a typical defect that exists is a void cavity. It is known that voids are a common source of partial discharge (PD) activity within an insulation system.
Illias, H A, H. A. Illias, G. Chen, Lewin, P L, Chen, G, P. L. Lewin   +5 more
core   +1 more source

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

Partial discharge pulse propagation in power cable and partial discharge monitoring system [PDF]

IEEE Transactions on Dielectrics and Electrical Insulation, 2014
Partial discharge (PD) based condition monitoring has been widely applied to power cables. However, difficulties in interpretation of measurement results (location and criticality) remain to be tackled. This paper aims to develop further knowledge in PD signal propagation in power cables and attenuation by the PD monitoring system devices to address ...
Sheng, Bojie, Zhou, Chengke, Hepburn, D., Dong, Xiang, Peers, G., Zhou, Wenjun, Tang, Zeyang   +6 more
openaire   +4 more sources

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

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

Investigation of propagation of partial discharges in power transformers and techniques for locating the discharge

, 2005
The location of partial discharges in a power transformer can be determined based on the characteristics of the transfer function from the discharge source to the measuring terminal.
Crossley, P.A., Crossley, P. A., Hettiwatte, S.N., Wang, Z.D., Hettiwatte, S. N., Wang, Zhong Dong   +5 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  

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