Advanced digital instrumentation for partial-discharge measurement

Karady, G.G.; Oliva, J.R.; Domitz, S.; Meketa, R.

doi:10.1016/0378-7796(92)90018-v

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Dielectric breakdowns in high‐voltage equipment are normally preceded by repetition of partial discharges (PDs). This is because of the PD is one of the major factors that causes dielectric insulation failure in high‐voltage equipment, such as in cable insulation and power transformers [1–4]. Therefore in order to avoid dielectric breakdowns, it is essential to perform PD measurement on high‐voltage insulation system under various conditions of the applied voltage and defect source.…”

Section: Introductionmentioning

confidence: 99%

Partial discharge behaviours within a void‐dielectric system under square waveform applied voltage stress

Illias¹,

Tunio²,

Bakar

et al. 2014

IET Science, Measurement & Technology

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Section: Introductionmentioning

confidence: 99%

Partial discharge behaviours within a void‐dielectric system under square waveform applied voltage stress

Illias¹,

Tunio²,

Bakar

et al. 2014

IET Science, Measurement & Technology

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“…Electrical insulation is an important factor in the performance of power facilities; however, the insulation performance of the power facilities decreases because of mechanical, electrical, thermal, chemical, and environmental stress [1][2][3][4]. As power transformer accidents cause large outage areas and huge cost to repair, on-line monitoring and periodic diagnosis is required for stable power supply [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Analysis and Origin Positioning of Acoustic Signals Produced by Partial Discharges in Insulation Oil

Park¹,

Jo²,

Kim³

et al. 2013

Journal of Electrical Engineering and Technology

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-This paper dealt with the propagation characteristics of acoustic signals produced by partial discharges and the positioning of PD origin in insulation oil to develop insulation diagnostic techniques of oil-immerged transformers. Electrode systems such as needle to plane, plane to plane, and particle electrodes were fabricated to simulate some defects of power transformers. In addition, the frequency spectrum and propagation characteristics of acoustic signals with partial discharge (PD) in insulation oil were analyzed. Although there were differences based on the type of defect, the frequency spectra of the acoustic signals measured by wide and narrow band acoustic emission (AE) sensors were distributed in the range of 50 kHz-400 kHz. Therefore, a narrowband AE sensor is suitable for the diagnosis of oil-immersed power transformers. We could find the position of the PD source with an error margin of 10% in the experiments by calculating the position of the PD occurrence using the time difference of arrival measured by five AE sensors.

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