Method for dividing defect grade of abnormal heating of cable terminal

• Main Authors: LIU DANBING, HUANG PEIZHUAN, ZHAO PENGBO, HUANG SHUNTAO, WEI YILONG, LI JIAN, LIAO YANQUN, SHI XIAOCHUAN, ZHOU HAO, YE YUTING
• Format: Patent
• Language: Chinese; English
• Published: 21.01.2020
• Subjects: CALCULATING; COLORIMETRY; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; PRESENTATION OF DATA; RADIATION PYROMETRY; RECOGNITION OF DATA; RECORD CARRIERS; TESTING

The invention relates to the technical field of overhauling of electrical equipment, in particular to a method for dividing the defect grade of abnormal heating of a cable terminal. The method comprises the following steps that S1, the cable terminal part is extracted from normal cable terminal infrared images to serve as an overall template, infrared images of the three-phase cable terminal of ato-be-diagnosed circuit is extracted to serve as to-be-matched images, and the cable terminal part is matched; S2, the maximum gray value g is extracted from the cable terminal part to obtain the maximum temperature of the three-phase cable terminal, and whether the cable terminal state is normal or abnormal is judged according to the magnitude of the interphase temperature difference and the abnormal threshold value; S3, a suspected superheating phase and a reference phase are determined, and a suspected superheating area is determined in the suspected superheating phase; S4, the suspected superheating area is utiliz