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2024 | OriginalPaper | Chapter

7. Partial Discharges and Ozone

Authors : Victor Dmitriev, Rodrigo M. S. Oliveira, Ronaldo F. Zampolo, Paulo R. Moutinho de Vilhena, Fernando de Souza Brasil, Martim Felipe Fernandes

Published in: Partial Discharges in Hydroelectric Generators

Publisher: Springer International Publishing

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Abstract

The main method for monitoring the condition of stator insulation in hydrogenerators is the measurement of partial discharge pulses through capacitive couplers. However, ozone concentration, produced by partial discharges exposed to air, can also be measured and provides valuable insights into the machine's condition. Ozone is highly reactive and can cause chemical damage to generators, especially when combined with atmospheric nitrogen and humidity to form nitric acid. The chapter delves into the historical understanding of ozone's role in insulation degradation, the chemical reactions involved, and the practical implications for diagnostic methods. It highlights the importance of continuous ozone monitoring and the challenges associated with interpreting ozone concentrations in relation to partial discharges. The chapter also discusses the various types of sensors used for ozone measurement and their advantages and disadvantages. Additionally, it explores the environmental and health implications of ozone production in electrical machinery, emphasizing the need for proper monitoring and maintenance practices. The chapter concludes by emphasizing the value of ozone measurements as a diagnostic tool for predictive maintenance, offering a valuable perspective on the complex interplay between electrical discharges, ozone formation, and insulation degradation in hydrogenerators.
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previous chapter Digital Signal Processing Techniques Applied to Partial Discharge Monitoring and Classification
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Metadata
Title
Partial Discharges and Ozone
Authors
Victor Dmitriev
Rodrigo M. S. Oliveira
Ronaldo F. Zampolo
Paulo R. Moutinho de Vilhena
Fernando de Souza Brasil
Martim Felipe Fernandes
Copyright Year
2024
Book
Partial Discharges in Hydroelectric Generators

Print ISBN: 978-3-031-36603-1

Electronic ISBN: 978-3-031-36604-8

Copyright Year: 2024

DOI
https://doi.org/10.1007/978-3-031-36604-8_7

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