Infrared thermography applied for outdoor power substations

Recent progress in diagnosing the reliability of electrical equipment by using infrared thermography

“…Faults in electrical power systems can be classified into a few categories, such as poor electrical connections, short or open circuits, overloads, loads imbalance and improper equipments installation [1,3,5,[8][9][10]. In most cases, poor electrical connections are among the common problems in transmission and distribution lines of electrical power systems [4].…”

“…This factor can be minimized if certified or qualified personals are employed. For technical factors, most of the information needed concerns the emissivity of the equipment under inspection, load current variation, distance of the object being inspected, and the IRT camera specifications [6,9,15]. Without considering all these factors, results may be misinterpreted or incorrect.…”

“…Generally, the factors that affect the accuracy of IRT measurements can be categorized as procedural, technical and environmental/ambient conditions [6,9]. The procedural factor concerns the thermographer itself.…”

Thermal Imaging for Enhancing Inspection Reliability: Detection and Characterization

“…In passive thermography, the temperature gradients are present in the materials and structures under tests naturally. In active thermography, the relevant thermal contrasts are induced by an external stimulus (Santos, 2008). The passive method has been widely applied in diverse areas such as production, predictive maintenance, medicine, detection of forest fire, thermal efficiency survey of buildings, road traffic monitoring, agriculture and biology, detection of gas and in NDT.…”

“…Generally, the factors that affect the accuracy of IRT measurements can be categorized as procedural, technical and environmental/ambient conditions (Santos et al, 2008) (Hellier, 2001). The procedural factor concerns the thermographer itself.…”