Investigating an Alternate Detector for Solar-blind Ultraviolet Cameras for High-Voltage Inspection

Coetzer, Casper; Becker, T.; West, Nicholas J.; Leuschner, Wilhelm

doi:10.1109/saupec/robmech/prasa52254.2021.9377216

Cited by 3 publications

(4 citation statements)

References 25 publications

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“…Clues for a suitable radiometric algorithm for SBUV ICMOS cameras can be derived from other SBUV detectors that share similar detector technology but provide a different image output. An example is an SBUV camera with an anode resistive output which implied that optical pulses correlate with electrical corona discharge pulses over time and a relative pulse height [13]. This pulse height consideration is confirmed by the related electrical domain discharge energy (Coulomb units), which is measured by summation of pulses and their heights over a time period, as in Fig 3 [4,14].…”

Section: Introductionmentioning

confidence: 83%

Opto-Electronics Review

Coetzer,

West

2021

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Solar-blind ultraviolet cameras with image intensifier with CMOS detector typically use various count methodologies to measure the optical energy of an electrical corona. However, these count methodologies are non-radiometric without considering parameters such as distance, focus-, zoom-, and gain setting of a camera. An algorithm which considers the calibration and radiometric measurement of optical energy for the slow frame rate intensifier type cameras is presented. Furthermore, it is shown how these calibration data together with the flowcharts are used for the conversion from raw measured data to radiometric energy values.

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Section: Introductionmentioning

confidence: 83%

Opto-Electronics Review

Coetzer,

West

2021

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“…There are several commercial cameras that combine visible and solar-blind UV detectors. They are mostly used to inspect high-voltage infrastructure [ 111 ]. Most of these cameras are based on CCD sensors [ 112 ] or CMOS sensors [ 113 ] because they have been shown to be sensitive enough to detect weak corona discharges [ 114 ], so dual-spectra UV-visible cameras have been extensively used to detect corona discharges [ 115 , 116 ].…”

Section: Ultraviolet (Uv) and Visible Imaging Applied To Corona Disch...mentioning

confidence: 99%

Application of Image Sensors to Detect and Locate Electrical Discharges: A Review

Ruiz

2022

Sensors

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Today, there are many attempts to introduce the Internet of Things (IoT) in high-voltage systems, where partial discharges are a focus of concern since they degrade the insulation. The idea is to detect such discharges at a very early stage so that corrective actions can be taken before major damage is produced. Electronic image sensors are traditionally based on charge-coupled devices (CCDs) and, next, on complementary metal oxide semiconductor (CMOS) devices. This paper performs a review and analysis of state-of-the-art image sensors for detecting, locating, and quantifying partial discharges in insulation systems and, in particular, corona discharges since it is an area with an important potential for expansion due to the important consequences of discharges and the complexity of their detection. The paper also discusses the recent progress, as well as the research needs and the challenges to be faced, in applying image sensors in this area. Although many of the cited research works focused on high-voltage applications, partial discharges can also occur in medium- and low-voltage applications. Thus, the potential applications that could potentially benefit from the introduction of image sensors to detect electrical discharges include power substations, buried power cables, overhead power lines, and automotive applications, among others.

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“…Hotspots are identified with a spatial filter that was explained as part of the alternative SBUV detector proposed and presented by this team previously [20,21].…”

Section: Step2: Rudimentary Measurementsmentioning

confidence: 99%

“…However, the total optical SBUV flux to calculate is usually somewhat challenging as it is the irradiance E which is defined as an optical flux per area [W•m distance [18,19]. Fortunately, the total optical SBUV flux of a source can be determined by modelling irradiance as a sphere with a low atmospheric attenuation for SBUV at short distances [8]. The total flux is modelled by a narrowband source (from calibration) as an equivalent narrowband optical flux…”

Section: Optical and Electrical Relationmentioning

confidence: 99%

Opto-Electronics Review

Coetzer,

Myburgh,

West

et al. 2022

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Solar-blind ultraviolet cameras as part of high-voltage electrical inspections until recently have mostly been used for pure observations. These observations only imply the presence of corona discharges and not the severity thereof. A radiometric algorithm together with a calibration algorithm to perform an optical energy measurement were presented earlier. This is a guide on how to apply the algorithm to determine the total optical measurement from corona discharges, plus additional processing. This guide and additions are used to compare the electrical and optical domains with actual examples. The main objective is to illustrate how to determine the electrical and optical relation for the IEC 60720 high-voltage electrical test configurations using a standard open procedure.

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Investigating an Alternate Detector for Solar-blind Ultraviolet Cameras for High-Voltage Inspection

Cited by 3 publications

References 25 publications

Opto-Electronics Review

Opto-Electronics Review

Application of Image Sensors to Detect and Locate Electrical Discharges: A Review

Opto-Electronics Review

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