Experimental study of visual corona under aeronautic pressure conditions using low-cost imaging sensors
Visual corona tests have been broadly applied for identifying the critical corona points of diverse high-voltage devices, although other approaches based on partial discharge or radio interference voltage measurements are also widely applied to detect corona activity. Nevertheless, these two techniq...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/175466 |
| Acceso en línea: | https://hdl.handle.net/2117/175466 https://dx.doi.org/10.3390/s20020411 |
| Access Level: | acceso abierto |
| Palabra clave: | Electric discharges High voltages Corona (Electricity) Image converters Aeronautics Partial discharge Corona effect Arc tracking Imaging sensor High voltage Low pressure More electric aircraft Descàrregues elèctriques Alta tensió Imatges -- Convertidors Aeronàutica Àrees temàtiques de la UPC::Enginyeria elèctrica Àrees temàtiques de la UPC::Energies::Energia elèctrica::Electricitat |
| Sumario: | Visual corona tests have been broadly applied for identifying the critical corona points of diverse high-voltage devices, although other approaches based on partial discharge or radio interference voltage measurements are also widely applied to detect corona activity. Nevertheless, these two techniques must be applied in screened laboratories, which are scarce and expensive, require sophisticated instrumentation, and typically do not allow location of the discharge points. This paper describes the detection of the visual corona and location of the critical corona points of a sphere-plane gap configurations under different pressure conditions ranging from 100 to 20 kPa, covering the pressures typically found in aeronautic environments. The corona detection is made with a low-cost CMOS imaging sensor from both the visible and ultraviolet (UV) spectrum, which allows detection of the discharge points and their locations, thus significantly reducing the complexity and costs of the instrumentation required while preserving the sensitivity and accuracy of the measurements. The approach proposed in this paper can be applied in aerospace applications to prevent the arc tracking phenomenon, which can lead to catastrophic consequences since there is not a clear protection solution, due to the low levels of leakage current involved in the pre-arc phenomenon. |
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