Results 121 to 130 of about 10,554 (149)
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Fundamental investigations concerning the behaviour of partial discharges (PD) in dielectric liquids
10th International Conference on Conduction and Breakdown in Dielectric Liquids, 2002The authors report the results of fundamental investigations on the behavior of partial discharges (PDs) in insulating fluids. The shape of PD pulses is recorded with a special measuring system and the characteristics of PD pulses and their dependencies in insulating liquids are determined.
H. Borsi, U. Schroder
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Partial discharge. XVI. Ultrasonic sensing of PD within large capacitors
IEEE Electrical Insulation Magazine, 1993For pt.XV see ibid., vol.8, no.6, p.37 et seq. (1993). High-voltage capacitor technology is reviewed, and the characteristics of partial discharges (PDs) in these capacitors, the PD's ultrasonic signatures, and the effects of acoustic attenuation within capacitor windings are discussed.
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Using Fiber Bragg Grating Sensors for Partial Discharge (PD) Detection on Power Cables
Optica Advanced Photonics Congress 2022, 2022This paper presents the preliminary results of the Fiber Bragg Gratings sensors temperature/strain cross-sensitivity allied to a low sampling rate to distinguish Partial Discharge (PD) events in power cables.
Ricardo Vendruscolo +6 more
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Partial discharge. V. PD in polymer-type line insulators
IEEE Electrical Insulation Magazine, 1991For pt.IV see ibid., vol.7, no.1, p.20 (1991). Some of the problems related to corona and partial discharge damage to polymer insulators are outlined. The basic construction of polymer insulators for overhead lines, which consist of a core, weathersheds, and metal end fittings, is described.
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Signal extraction methods for online partial discharge (PD) measurement of power transformers
2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2015Wavelet transform-based Partial discharge (PD) signal extraction methods have been widely adopted in the past ten years. However, these methods may still encounter some difficulties in online PD measurements, in which PD signals can be overwhelmed by noise.
Junhyuck Seo, Hui Ma, Tapan Saha
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Experiences in on-site partial discharge measurements and prospects for PD monitoring
2008 International Conference on Condition Monitoring and Diagnosis, 2008With four case studies (dry-type transformer, power transformer, GIS, generator) this paper describes the principle of synchronous multi-channel PD measurements and its benefits for PD data evaluation. With respect to monitoring the tracing of a charge value as QIEC over the measuring time is not sufficient to assess the PD activity of an HV apparatus.
K. Rethmeier +6 more
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Interference analysis and rejection of partial discharge (PD) monitoring signal on-site
Proceedings of 2001 International Symposium on Electrical Insulating Materials (ISEIM 2001). 2001 Asian Conference on Electrical Insulating Diagnosis (ACEID 2001). 33rd Symposium on Electrical and Electronic Insulating Materials and Applications in System, 2002According to the waveform and spectrum characteristics, various interferences during on-line PD measurement could be divided into three types such as the sinusoidal continuous noises, pulse shaped interference (including the periodical and stochastical) and background noises (similar to the white noise).
null Xiaoning Wang +2 more
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Partial discharge. VII. Practical techniques for measuring PD in operating equipment
IEEE Electrical Insulation Magazine, 1991For pt.VI see ibid., vol.7, no.3, p.9 (1991) Online partial-discharge (PD) tests for monitoring the condition of the solid dielectric insulation in high-voltage equipment are discussed. Sources of external electrical noise are identified, as are attributes of PD and noise that are helpful in drawing distinctions between them. Methods for distinguishing
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Proceedings of 2005 International Symposium on Electrical Insulating Materials, 2005. (ISEIM 2005)., 2005
This paper introduces a novel technique for partial discharge (PD) measurement and analysis: PD-CPWA (PD current pulse waveform analysis). PD-CPWA focuses on the PD current pulse waveform and its time transition from PD inception to breakdown (BD), which is closely related to PD mechanisms in electrical insulating materials.
N. Hayakawa, Y. Sugimor, H. Okubo
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This paper introduces a novel technique for partial discharge (PD) measurement and analysis: PD-CPWA (PD current pulse waveform analysis). PD-CPWA focuses on the PD current pulse waveform and its time transition from PD inception to breakdown (BD), which is closely related to PD mechanisms in electrical insulating materials.
N. Hayakawa, Y. Sugimor, H. Okubo
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Partial discharge. XXI. Acoustic emission based PD source location in transformers
IEEE Electrical Insulation Magazine, 1995Acoustic emission-based partial discharge source location has been applied successfully to power transformers in both factory and field environments, and this method is becoming an established test procedure with a high success rate. With the aid of local utilities and utility laboratories that use acoustic emission apparatus daily, we expect further ...
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