Creeping Discharge Evolution at the Oil/Pressboard Interface Using Multi-Sensor Technology Under AC Voltage

In response to the limitations of single sensors in engineering applications, this article systematically investigates the evolution process and mechanism characteristics of creeping discharge at the oil/pressboard interface under ac voltage, based on multi-sensor technology. First, a relationship between the measured amplitude and fault development time was established using multi-sensor measurement technology, revealing the variation pattern of multi-parameter signals during the creeping discharge process. Second, the mechanism characteristics of creeping discharge development process were revealed in conjunction with experimental phenomena. Finally, based on multi-parameter signals and mechanism characteristics, the discharge process is divided into three stages: slow development, rapid development, and pre-breakdown. The discharge mechanism characteristics at each stage show a significant correlation with the measured amplitude. This study provides important references for the in-depth understanding of the creeping discharge process and the synchronized detection of multi-parameter sensors.