Infrared diagnostic technology makes reliable predictions of early faults and insulation performance of electrical equipment, and improves the preventive test and maintenance of traditional electrical equipment (preventive tests are the standards introduced by the former Soviet Union in the 1950s) to predictive state maintenance, which is also modern power The direction of business development. In particular, the development of large generating units and ultra-high voltages have put higher and higher requirements on the reliable operation of the power system, which is related to the stability of the power grid. With the continuous development and maturity of modern science and technology, the use of infrared state monitoring and diagnostic technology has the characteristics of long distance, no contact, no sampling, no disintegration, and is accurate, fast, intuitive, etc., online monitoring and diagnosis of electrical equipment in real time Most faults (coverage of almost all faults in electrical equipment). It is highly valued by the domestic and foreign power industry (a state-of-the-art maintenance system commonly used abroad in the late 1970s), and has been rapidly developed. The application of infrared detection technology is of great significance to improve the reliability and effectiveness of electrical equipment, improve the economic efficiency of operation, and reduce maintenance costs. It is a good method widely popularized in the field of predictive maintenance, and it can also improve the maintenance level and the health level of equipment to a higher level.
The infrared imaging detection technology can be used for non-contact detection of the running equipment, photographing the distribution of its temperature field, measuring the temperature value of any part, and diagnosing various external and internal faults based on this, with real-time, remote measurement, intuitive and quantitative The advantages such as temperature measurement are very convenient and effective for detecting the operating equipment and live equipment of power plants, substations and transmission lines.
The method of using thermal imaging cameras to detect online electrical equipment is infrared temperature recording. Infrared temperature recording method is a new technology used in industry for non-destructive detection, testing equipment performance and mastering its operating status. Compared with traditional temperature measurement methods (such as thermocouples, wax sheets with different melting points, etc. placed on the surface or body of the measured object), the thermal imager can detect the temperature of the heating point in real time, quantitatively, and online within a certain distance. The temperature gradient thermal image of the device during operation can also be drawn, and it has high sensitivity and is not interfered by electromagnetic fields, which is convenient for field use. It can detect thermally induced faults in electrical equipment with a high resolution of 0.05 ° C in a wide range of -20 ° C to 2000 ° C, revealing such as heat generation of wire joints or clamps, and local hot spots in electrical equipment, etc.
Infrared diagnostic technology for live equipment is an emerging discipline. It is a comprehensive technology that uses the heating effect of charged equipment and uses special equipment to obtain infrared radiation information emitted from the surface of the equipment, and then to judge the condition and defect nature of the equipment
