Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar
This paper presents results based on direct experimental measurements of tangential (E<sub>t</sub>) and normal (E<sub>n</sub>) E-field components along the stress grading system (SGS) of a real stator bar (Roebel type) for different AC 60 Hz applied voltages. These measuremen...
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| Format: | Article |
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MDPI AG
2020-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/3/534 |
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| author | Gbah Koné Christophe Volat Claude Hudon Simon Bernier |
| author_facet | Gbah Koné Christophe Volat Claude Hudon Simon Bernier |
| author_sort | Gbah Koné |
| collection | DOAJ |
| description | This paper presents results based on direct experimental measurements of tangential (E<sub>t</sub>) and normal (E<sub>n</sub>) E-field components along the stress grading system (SGS) of a real stator bar (Roebel type) for different AC 60 Hz applied voltages. These measurements were made with a new electro-optic system allowing for the study of both spatial distributions of two E-field components along the bar and their temporal evolution at critical points. The results obtained allowed us to calculate the correlation between the distribution of E<sub>n</sub> and E<sub>t</sub> along the SGS. In particular, it was demonstrated that the E<sub>n</sub> distribution presents a characteristic minimum, which can be used to identify the zone of partial discharge inception. Moreover, it was possible to observe an enlargement of the E<sub>t</sub> component distribution followed by a saturation in magnitude with the applied voltage increase. Moreover, the results have demonstrated that the waveform of the E<sub>n</sub> component is mostly affected by the SG material used, producing a greater distortion in its waveform than those obtained for the E<sub>t</sub> component. The more significant distortion was obtained at the end of the outer corona protection (OCP) material, corresponding to the first maximum of the E<sub>n</sub> component and characterized by the appearance of a third harmonic of large amplitude. |
| first_indexed | 2024-04-11T12:14:06Z |
| format | Article |
| id | doaj.art-a2e52023a5b7463f96e8ff5562e2910d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:14:06Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a2e52023a5b7463f96e8ff5562e2910d2022-12-22T04:24:27ZengMDPI AGEnergies1996-10732020-01-0113353410.3390/en13030534en13030534Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator BarGbah Koné0Christophe Volat1Claude Hudon2Simon Bernier3Laboratory of Modelling and Diagnostic of Electrical Power Network Equipment (MODELE), Université du Québec à Chicoutimi, 555 Boulevard de l’Université, Chicoutimi, QC G7H 2B1, CanadaLaboratory of Modelling and Diagnostic of Electrical Power Network Equipment (MODELE), Université du Québec à Chicoutimi, 555 Boulevard de l’Université, Chicoutimi, QC G7H 2B1, CanadaInstitut de Recherche d’Hydro-Québec (IREQ), Hydro-Québec, 1800 Boulevard Lionel-Boulet, Varennes, QC J3X 1S1, CanadaInstitut de Recherche d’Hydro-Québec (IREQ), Hydro-Québec, 1800 Boulevard Lionel-Boulet, Varennes, QC J3X 1S1, CanadaThis paper presents results based on direct experimental measurements of tangential (E<sub>t</sub>) and normal (E<sub>n</sub>) E-field components along the stress grading system (SGS) of a real stator bar (Roebel type) for different AC 60 Hz applied voltages. These measurements were made with a new electro-optic system allowing for the study of both spatial distributions of two E-field components along the bar and their temporal evolution at critical points. The results obtained allowed us to calculate the correlation between the distribution of E<sub>n</sub> and E<sub>t</sub> along the SGS. In particular, it was demonstrated that the E<sub>n</sub> distribution presents a characteristic minimum, which can be used to identify the zone of partial discharge inception. Moreover, it was possible to observe an enlargement of the E<sub>t</sub> component distribution followed by a saturation in magnitude with the applied voltage increase. Moreover, the results have demonstrated that the waveform of the E<sub>n</sub> component is mostly affected by the SG material used, producing a greater distortion in its waveform than those obtained for the E<sub>t</sub> component. The more significant distortion was obtained at the end of the outer corona protection (OCP) material, corresponding to the first maximum of the E<sub>n</sub> component and characterized by the appearance of a third harmonic of large amplitude.https://www.mdpi.com/1996-1073/13/3/534stress-grading systemstator barnormal and tangential e-field componentselectro-optic sensor |
| spellingShingle | Gbah Koné Christophe Volat Claude Hudon Simon Bernier Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar Energies stress-grading system stator bar normal and tangential e-field components electro-optic sensor |
| title | Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar |
| title_full | Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar |
| title_fullStr | Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar |
| title_full_unstemmed | Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar |
| title_short | Experimental Investigation of the Spatial and Temporal Evolution of the Tangential and Normal E-Field Components along the Stress Grading System of a Real Stator Bar |
| title_sort | experimental investigation of the spatial and temporal evolution of the tangential and normal e field components along the stress grading system of a real stator bar |
| topic | stress-grading system stator bar normal and tangential e-field components electro-optic sensor |
| url | https://www.mdpi.com/1996-1073/13/3/534 |
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