Recently,infrared thermal imaging and other live detection technologies have been widely used in power systems.With the further maturity of the technology,it has become a powerful means to accurately find the defects such as equipment overheating under the condition of no power cut.The use of infrared thermal imaging technology for live detection of high-voltage electrical equipment is conducive to find the heating parts of the equipment timely,identify the causes of heating timely,reduce unplanned power outages,provide a basis for maintenance decisions,further improve the safety control level of power equipment,ensure a higher quality and reliable power supply,and better serve the economic and social development and the needs of people's better life.