Results 131 to 140 of about 2,488 (168)

Analysis and rejection of noises from partial discharge (PD) on-site testing environment

Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417), 2004
There were many kinds of interference resources in the partial discharge on-site testing environment for a power transformer. According to their spectrums, those could be classified into sinusoidal continuous noises from power carrier communication and radio systems, pulse-shaped wide-band noises including periodical and stochastical pulse-shaped ...
null Xiaoning Wang, null Deheng Zhu, null Fuqi Li, null Shengyou Gao   +3 more
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Partial discharge. X. PD in gas-insulated substations-measurement and practical considerations

IEEE Electrical Insulation Magazine, 1992
For pt.IX see ibid., vol.7, no.6, p.5 et seq. (1991). An overview of engineering practice related to partial discharge (PD) measurements in gas-insulated substations (GISs) is provided. The following questions are addressed: why measure PD in GIS?; in which phases of the life cycle should PD be measured?; what PD measurements are presently available ...
R. Baumgartner, B. Fruth, W. Lanz, K. Pettersson   +3 more
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Development of automatic identification method for GIS PD (Partial Discharge) defects diagnosis

2007 IEEE Lausanne Power Tech, 2007
In this paper, an overview of a new GIS (gas insulated switchgear) PD (partial discharge) diagnostic algorithm for both single-defects and multi-defects in HiPDS-G (Hyundai intelligent preventive diagnostic system for GIS) developed by HHI(Hyundai Heavy Industries Co., Ltd) is given.
Young Chan Choi, Seung Wan Jung, Soo Nam Kim, Seong Il Kim, Joong Lok Kwon   +4 more
openaire   +1 more source

PD data analysis and evaluation of partial discharge patterns for uniform characterisation

IEE Proceedings - Science, Measurement and Technology, 2004
A modern partial discharge (PD) analyser provides a complete record of PD events obtained during the time of observation. A variety of analysis techniques can be applied to the data to extract characteristic information. An analysis technique that would support instrument-independent characterisation needs to have a method of identifying characteristic
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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), 2015
Wavelet 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.
Seo, Junhyuck, Ma, Hui, Saha, Tapan
openaire   +2 more sources

Partial discharge current pulse waveform analysis (PD-CPWA) based on PD mechanisms in solid and gas media

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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Some possible new applications of a partial‐discharge (PD) model and its relation to PD‐detection sensitivity

European Transactions on Electrical Power, 1996
AbstractIn this paper some possibilities of further applications of a known “Streamer Partial‐Discharge Model” are proposed. These possibilities refer to the relation between the observed partial‐discharge (PD) magnitude and the applied field to the insulation.
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Partial discharge. XV. Improved PD testing of solid dielectrics using X-ray induced discharge initiation

IEEE Electrical Insulation Magazine, 1992
For pt.XIV see ibid., vol.8, no.5, p.34 (1992). The effects of X-ray irradiation during partial discharge measurements are discussed. The partial discharge phenomena in cavities is detailed. A full-scale system capable of testing 138-kV-class post insulators under combined electric stress and X-ray radiation was implemented.
N. Fujimoto, S. Rizzetto, J.-M. Braun
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Partial discharge deterioration and through-hole formation in polypropylene for power capacitors: Effects of PD magnitude and accumulated PD charge

2017 International Symposium on Electrical Insulating Materials (ISEIM), 2017
The authors have been investigating the deterioration characteristics of polypropylene (PP) films due to partial discharge (PD) in a closed void as a basic study of longterm deterioration of power capacitors. We reported that (1) the number of PD pulses decreased with time and then fluctuated, (2) through holes were observed only after the inception of
Ryouhei Yano, Yasuo Suzuoki, Muneaki Kurimoto, Takeyoshi Kato, Toshihisa Funabashi, Fumitaka Komori, Yukio Sasatani, Tomohiro Kawai, Shinkichi Hamada, Shintarou Ogura, Yuuya Sano   +10 more
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Improvement of partial discharge (PD) resistance of epoxy resin by using sulfur‐containing additives

Electrical Engineering in Japan, 1994
AbstractIn the field of high‐voltage engineering, it has been desired for a long time to improve the internal PD resistance of epoxy resin without lowering other properties. Recently, the authors discovered that some sulfur compound as curing agents or simple additives improved the PD resistance of rubber markedly, and here an attempt has been made to ...
Yasuhiko Kako, Shigetaka Watanabe, Yutaka Higashimura, Kenji Matsunobu   +3 more
openaire   +1 more source