Szczegóły publikacji
Opis bibliograficzny
Measurement of partial discharge echo and extraction of decay attributes / Marek FLORKOWSKI // Measurement ; ISSN 0263-2241. — 2024 — vol. 238 art. no. 115338, s. 1–9. — Bibliogr. s. 9, Abstr. — Publikacja dostępna online od: 2024-07-18
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 154680 |
|---|---|
| Data dodania do BaDAP | 2024-07-31 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.measurement.2024.115338 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Measurement |
Abstract
In this article, an original measurement methodology is presented for insight into the partial discharge (PD) mechanism − being one of the key indicators of high-voltage insulation system integrity. This approach is based on riveting measurements of PD echo (PDE) that are acquired by applying a chopped sequence. The new extension of PDE potential, presented in this paper, refers to the detection and extraction of echo attributes, providing an additional quantitative assessment of the insulation condition. In this way a noninvasive insight into source of defect can be provided, which is not possible by conventional PD measurements. Hence, intension and future development direction of this method is to provide insulation deterioration imaging. The detection of echo discharges occurs during the voltage-less time break between consecutive periods of excitation voltage, therefore the further advantage of PDE is higher immunity to excitation-driven disturbances. The whole measurement sequence can be subdivided in to AC and DC parts. The measurement methodology can be applied to various high-voltage objects and insulation systems. As an example, measurement results obtained on polymeric material that contained an embedded defect are presented. A comparison of PD echo effects on both untreated and aged specimens revealed the dependence of gaseous inclusion surface conditions on the echo pattern. Presented new measurement methodology allowed for extraction and evaluation of PD echo time constant, which yielded distinct values in the cases of new and aged specimens. The echo discharges were attributed to the mechanisms in the dielectric that started in the voltage-less part after the transition point. These effects represent the interplay between the remnant electric field and the decay of the electric field that was accumulated from the previous PDs. The aim of this paper was to show advanced PD measurement approach to investigate the effects of an internal embedded electrical insulation defect on an externally measurable indicator. The paper also presents an attempt to extract additional information from phase-resolved PD images. In this context, further research is needed to provide directions toward a measurement technique and a potential future diagnostic approach.
