A study on the life estimation and cavity surface degradation due to partial discharges in spherical cavities within solid polymeric dielectrics using a simulation based approach

Rodríguez Serna, Johnatan Mauricio and Albarracín Sánchez, Ricardo (2021). A study on the life estimation and cavity surface degradation due to partial discharges in spherical cavities within solid polymeric dielectrics using a simulation based approach. "Polymers", v. 13 (n. 3); pp. 324-347. ISSN 2073-4360. https://doi.org/10.3390/polym13030324.

Description

Title: A study on the life estimation and cavity surface degradation due to partial discharges in spherical cavities within solid polymeric dielectrics using a simulation based approach
Author/s:
  • Rodríguez Serna, Johnatan Mauricio
  • Albarracín Sánchez, Ricardo
Item Type: Article
Título de Revista/Publicación: Polymers
Date: January 2021
ISSN: 2073-4360
Volume: 13
Subjects:
Freetext Keywords: Partial discharges; Time-to-breakdown; Polymer degradation; Prognosis; Dielectric breakdown
Faculty: E.T.S.I. Diseño Industrial (UPM)
Department: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Partial Discharges (PD) in cavities are responsible for the greatest ageing rate in polymeric solid dielectrics due to chemical and physical deterioration mechanisms activated by the charge carriers, Ultra Violet (UV) radiation and local temperature rising during PDs activity. From the above, it is necessary to develop prognosis tools based on PDs measurements as diagnostic quantities in order to infer the time-to-breakdown, life, of solid dielectrics for improving the reliability of electrical assets, especially in current applications where they are subject to great electrical stresses in voltage frequency and magnitude. In this paper, the degradation in polymeric materials induced by PDs in cavities is briefly discussed from a phenomenological point of view, and then it is quantitatively evaluated using a simulation-based approach and a new proposed damage function. The time-to-breakdown calculated from simulations exhibits good agreement when compared with experimental measurements. Additionally, an analysis on the effect of the magnitude and frequency of the applied voltage on the degradation rate is also presented and the effectiveness of a degradation indicator, proposed by other authors, is evaluated under different stress conditions.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainPID2019-107126RB-C21UnspecifiedUnspecifiedUnspecified

More information

Item ID: 67362
DC Identifier: http://oa.upm.es/67362/
OAI Identifier: oai:oa.upm.es:67362
DOI: 10.3390/polym13030324
Official URL: https://www.mdpi.com/2073-4360/13/3/324
Deposited by: Memoria Investigacion
Deposited on: 11 Jun 2021 06:25
Last Modified: 11 Jun 2021 06:25
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