Identification of Simultaneously Active PD Sources in Stator Insulation Using Variable Frequency Excitation

Nair, Ramesh P.; Vishwanath, Sumangala B.

doi:10.1109/tdei.2021.009208

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Another reason for performing the test in low frequency is that, depending on the location of the sensor relative to the PD source, the high-frequency components of the PD signal induced by the external high voltage source are likely to be attenuated. Therefore, the greater the detection frequency range, the greater the PD detection accuracy [27][28][29][30][31].…”

Section: Offline Measurementmentioning

confidence: 99%

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: Offline Measurementmentioning

confidence: 99%

Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

et al. 2022

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The Applicability of Very Low Frequency Diagnostic Testing in the Evaluation of Thermally Aged Stator Coil

Nair¹,

Vishwanath

2023

IEEE Trans. Dielect. Electr. Insul.

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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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Identification of Simultaneously Active PD Sources in Stator Insulation Using Variable Frequency Excitation

Cited by 3 publications

References 19 publications

Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

Partial Discharges Monitoring for Electric Machines Diagnosis: A Review

The Applicability of Very Low Frequency Diagnostic Testing in the Evaluation of Thermally Aged Stator Coil

Localization of Partial Discharges in Hydrogenerators by Ozone Emission

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