Research on Voltage Inductive Heated Defect Detection Technology Based on Temperature Width Intelligent Adjustment

Voltage inductive heated defects in electrical equipment are difficult to detect due to the small defect current, narrow temperature rise range, and the complex background in the high-voltage field of the substation, which reduces the contrast of the thermal image. Based on the field application of temperature difference method, thermal spectrogram method and the corresponding infrared thermal camera, this paper proposes a voltage inductive heated defect detection method with intelligent adjustment of temperature width, and realizes intelligent diagnosis of equipment operation status through model extraction, defect map feature extraction, and embedding of artificial intelligence algorithm to avoid the error and uncertainty brought by manual reading of infrared images. Finally, through the detection and disassembly analysis of voltage inductive heated defects in the operation of a 750kV arrester, the feasibility of the proposed temperature width intelligent adjustment method in the field infrared thermal image inspection process is verified.