Experimental Study of Visual Corona under Aeronautic Pressure Conditions Using Low-Cost Imaging Sensors

Sensors

Jordi-Roger Riba¹  Manuel Moreno-Eguilaz²  Álvaro Gómez-Pau² 

[1] Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain;Electronics Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain;

关键词: partial discharge;    corona effect;    arc tracking;    imaging sensor;    high voltage;    low pressure;    more electric aircraft;    aeronautics;   

DOI  :  10.3390/s20020411

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown