Conventionally Indiscoverable Electrical Degradation in Polymer Insulation is Now Seen with Naked Eye

Abstract

With the rapid development of energy technology, the reliability and durability of electrical insulation is becoming more and more important. In many critical systems, such as new energy systems, aerospace systems, power transmission and transformation systems, and rail transit systems, electrical degradation of dielectric polymers occurs frequently under harsh operating conditions. It will lead to electrical breakdown of key equipment if the risk is not identified and eliminated in time, resulting in huge economic losses. Unfortunately, electrical degradation usually initiates in a tiny area and does not cause significant changes in electrical properties of the material at the beginning, therefore it is extremely difficult to detect and has long been a major hidden danger threatening the safe operation of electrical and electronic equipment.