Journal ArticleDOI
Metallized Film Power Capacitors End-of-Life Study Through Monitored Destruction Tests
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TLDR
In this article, a model is proposed to describe the degeneration of dielectric failure, the use of this model can help to predict the behavior of capacitors when they reach the end of life and to a more accurate design of the protection systems.Abstract:
A wide range of experiments was performed on metallized film capacitors. The monitoring of destruction tests was used to analyze the electrical properties of artificial critical defects. It is shown herein that these defects in the windings of the capacitors have a wide range of electrical properties and the behavior of the capacitor in the test is strongly related to these properties. A model is proposed to describe the degeneration of dielectric failure, the use of this model can help to predict the behavior of capacitors when they reach the end of life and to a more accurate design of the protection systems.read more
Citations
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Journal ArticleDOI
Crystallization Morphology-Dependent Breakdown Strength of Polypropylene Films for Converter Valve Capacitor
TL;DR: In this article, an organic crystallization accelerator with good dispersion improves the micromorphology of polypropylene (PP) films, and the doping content of the organic accelerator is optimized based on breakdown experiments under DC voltage.
Journal ArticleDOI
Influence of External Factors on Self-healing Capacitor Temperature Field Distribution and Its Validation
TL;DR: In this paper, a 3D temperature field numerical simulation model for a self-healing power capacitor is formulated in Fluent 15.0 and the results reveal that the temperature of the core is 2 °C-3 °C higher than that of the shell.
Journal ArticleDOI
Fault diagnosis of power capacitors using a convolutional neural network combined with the chaotic synchronisation method and the empirical mode decomposition method
Journal ArticleDOI
Research on the self-healing failure characteristics and its protection methods of high-voltage self-healing capacitors
Yan Fei,Wang Zijian,Yin Ting +2 more
TL;DR: In this paper, a method of capacitor self-healing failure protection based on active power variation was proposed to protect high-voltage capacitors from selfhealing failures by measuring the impedance changes before and after the test and calculated the active power dissipated by the sample.
Dissertation
Modélisation, vieillissement et surveillance de l'état de santé des condensateurs films utilisés dans des applications avioniques
TL;DR: In this paper, the authors present two modeles fin de condensateurs films, permettant ainsi de suivre les evolutions de leurs grandeurs electriques dans des conditions coherentes avec l'application.
References
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The fundamentals of aging in HV polymer-film capacitors
C.W. Reed,S.W. Cichanowskil +1 more
TL;DR: In this paper, the basic phenomena involved in the aging of capacitors constructed using polymer films as the major dielectric material are discussed, and a wide variety of aging phenomena can be identified, ranging from simple electrical, dielectrics, thermal, radiation, chemical and physical aging, to aging originating from the specific construction of the capacitor.
Journal ArticleDOI
Thermogravimetric and differential scanning calorimetric analysis of natural fibres and polypropylene
TL;DR: In this article, the thermal behavior of variably separated flax and hemp fibres was characterized by means of thermogravimetric and differential scanning calorimetric analyses.
Journal ArticleDOI
A Changing Capacitor Technology - Failure Mechanisms and Design Innovations
TL;DR: The ac capacitor industry has seen almost a complete change in dielectrics, electrodes, and impregnants. as mentioned in this paper discusses the rational behind this changing technology, the improved performance aspects of these new designs, and some of the degradation mechanisms that have accompanied these changes.
Journal ArticleDOI
Kinetic study of the thermal decomposition of polypropylene, oil shale, and their mixture
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