Analysis of the results of on-line Partial Discharge Monitoring and the impact of the maintenance actions on a 30 MVA synchronous generator

Caprara, Andrea; Ciotti, Giacomo; Paschini, Lorenzo

doi:10.1109/eic47619.2020.9158739

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…In these cases, the PD pulse is analyzed in terms of frequency and pulse duration time, since each type of signal will occupy a time-frequency band of its own. The T-F map allows separating the PD types and then analyzing the contents individually [35]. Figure 13 shows the T-F map and the individual patterns identified.…”

Section: Time-frequency Map (T-f)mentioning

confidence: 99%

“…In [35,[66][67][68], data were collected using only one sensor per phase at the terminals; that is, in the simple form.…”

Section: Comparison With Standards and Statistical Analysis Simple Me...mentioning

confidence: 99%

“…In [35] the T-F map approach was used to discriminate between PDs in the grading region and the discharges in the slot region. A statistical analysis of the voltage pulse magnitude and repetition rate data is performed to identify PDs in a 30 MVA synchronous generator.…”

Section: Comparison With Standards and Statistical Analysis Simple Me...mentioning

confidence: 99%

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Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

et al. 2022

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Online monitoring of Partial Discharges (PDs) in rotating electrical machines is an useful tool for machine prognosis, as it presents reduced costs compared to intrusive inspections and is associated with relevant problems. Although this monitoring method has been developed for almost 50 years, the recent advancements in processes automation and signal processing techniques allow improvements that are still being studied by academic and industrial researchers. To analyze the current context of PDs monitoring, this article presents a literature review based on concepts of PDs in rotating machines, data acquisition techniques, state-of-the art commercial equipment, and recent methodologies for detection and pattern recognition of PDs. The challenges identified in the literature that motivate the development of more reliable and robust PD monitoring systems are presented and discussed.

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Section: Time-frequency Map (T-f)mentioning

confidence: 99%

“…In [35,[66][67][68], data were collected using only one sensor per phase at the terminals; that is, in the simple form.…”

Section: Comparison With Standards and Statistical Analysis Simple Me...mentioning

confidence: 99%

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Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

et al. 2022

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Localization of Partial Discharges in Hydrogenerators by Ozone Emission

Dmitriev,

de Oliveira,

de Alcantara

et al. 2024

Energies

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We suggest a new method of localization of partial discharges in high-power electrical systems. Ozone in a hydrogenerator is produced by chemical reactions induced by partial discharges in the stator region. The transport of ozone in an operating hydrogenerator is analyzed using a computational fluid dynamics model. The main aim of this work is to evaluate the ozone distribution in the generator radiators. Ozone sources are introduced into the stator model in different positions to analyze their effect on the measured values at the sensing points of radiators. Our results demonstrate a possibility of localization of partial discharges in hydrogenerator stator bars by ozone emission.

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Analysis of the results of on-line Partial Discharge Monitoring and the impact of the maintenance actions on a 30 MVA synchronous generator

Cited by 2 publications

References 9 publications

Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

Localization of Partial Discharges in Hydrogenerators by Ozone Emission

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