Results 211 to 220 of about 42,017 (255)

Partial discharge detection using ferrite antenna

Conference Record of the 1992 IEEE International Symposium on Electrical Insulation, 2003
Some examples of partial discharge detection by using a loop antenna wound on a ferrite core were demonstrated. The prototype of a partial discharge detector system using a ferrite antenna was demonstrated. It was found that the partial discharge can be detected by measuring the electromagnetic waves irradiated from the discharge event, using the loop ...
T. Ozaki, K. Abe, T. Umemura
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Partial discharge detection in power modules

2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289), 2003
Today, most railway applications use hybrid power modules. These IGBT modules are constituted of several dielectric materials to achieve chip packaging. Due to the presence of high voltage, new phenomena which could be previously ignored for lower voltage ratings have now to be taken into account. This is the case of partial discharges which may appear
F. Breit, E. Dutarde, J. Saiz, T. Lebey, D. Malec, S. Dinculescu   +5 more
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Partial discharge. II. Detection sensitivity

IEEE Electrical Insulation Magazine, 1990
For pt.I see ibid., vol.6, no.4, p.33-9 (1990). Options for detecting and characterizing the signal generated by a partial discharge (PD) within a test piece or test configuration are examined. Important parameters considered include minimum detectable signal (PD sensitivity), circuit time constants that limit PD waveform characterization (where this ...
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Partial Discharge Detection with Convolutional Neural Networks

2020 International Conference on Probabilistic Methods Applied to Power Systems (PMAPS), 2020
Covered conductors are widely adopted in the medium to low voltage systems to prevent faults and ignitions from events such vegetation contacting with distribution lines and conductors slapping together. However, such events could cause partial discharge in deteriorated insulation system of covered conductors and ultimately lead to failure and ignition.
Wei Wang, Nanpeng Yu
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On-line partial discharge detection in cables

IEEE Transactions on Dielectrics and Electrical Insulation, 1998
This paper describes an on-line PD (partial discharge) detection technique applicable to power cables. The method can be applied to both wire screen and solid shielded cables. In wire screen shielded cables, PD components with frequencies
N.H. Ahmed, N.N. Srinivas
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On-line partial discharge detection in transformer

Conference Record of the 1998 IEEE International Symposium on Electrical Insulation (Cat. No.98CH36239), 2002
This paper describes an on-line partial discharge (PD) detection technique applicable to distribution transformers. This technique uses a spectrum analyzer with a high-frequency preamplifier and high-frequency current probes. The PD measurements normally are made on each of the primary and secondary windings with a high-frequency current transformer ...
N.H. Ahmed, N.N. Srinivas
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Dielectric windows for UHF partial discharge detection

IEEE Transactions on Dielectrics and Electrical Insulation, 2001
Increasing the permittivity of the propagation medium inside a hollow tube lowers its cut-off frequency, allowing it to transmit a wider range of signal frequencies. This principle is applied to the design of dielectric windows that can be used to facilitate partial discharge (PD) detection at ultra high frequency (UHF) in a HV metalclad plant such as ...
Judd, M.D., Farish, O., Pearson, J.S., Hampton, B.F.   +3 more
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On-line partial discharge detection on transformers

18th International Conference and Exhibition on Electricity Distribution (CIRED 2005), 2005
Different diagnostic techniques are currently available for on-line insulation condition assessment of power transformers. Amongst these techniques a relatively new technique for detecting partial discharges (PD) in the Ultra High Frequency range of the spectrum is also introduced.
P.D. Agoris, S. Meijer, E. Gulski, J.J. Smit, A.J.L.M. Kanters   +4 more
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Partial discharge development and detection in dielectric liquids

IEEE Transactions on Dielectrics and Electrical Insulation, 2009
PD measurements in dielectric liquids have been normally performed in the past only using conventional narrow bandwidth detectors. The more recent use of ultra-wide bandwidth instruments has permitted to support once again the thesis that the PDs in oils are the consequence of the streamer (vapor phase) formation and its development.
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Electromagnetic Coupling Method for Partial Discharge Detection

2006 International Conference on Power System Technology, 2006
This paper examines the use of overhead power transmission lines as electromagnetic sensors for detecting partial discharge discharges caused by defective power transmission equipment based on both the experimental and simulation study. The experimental results show that a small amount of electromagnetic energy is coupled onto nearby power line ...
K. Wong, D. Spoor
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