Power Cable Terminal Fault Detection Method Based on Infrared Thermal Imaging

Abstract

According to the analysis results, most conventional power cable terminal fault detection methods use the time-domain joint analysis principle to determine whether the terminal has abnormal and fault-hidden dangers. Then, it carries out fault detection. The detection process is complex and time-consuming, and the cable terminal fault information cannot be obtained the first time. Based on this, infrared thermal imaging technology is introduced, and a new fault detection method is proposed. The method comprises the following steps. Firstly, acquire operation data of a power cable terminal and preliminarily judge whether the cable terminal is abnormal according to dynamic changes of conductive thermal resistance and convective thermal resistance of the terminal. Secondly, introduce an infrared thermal imaging technology on the basis and capture infrared rays radiated by the power cable terminal. Lastly, acquire temperature information of the surface of the terminal, combine the temperature with infrared ray quantity results in two directions, and make all-round detection of cable terminal faults. The experimental analysis indicates that the proposed cable terminal fault detection method can complete the fault detection in a shorter time. The detection time is shorter, and the efficiency is higher.