The Study of Discharge Light on XLPE-SIR Composite Medium Interface

Abstract

The cross-linked polyethylene cable is largely used in power-supply system of the city. As the length of the power cable is concerned with the technology and construction, the center joint is largely employed, and the fault of the power cable is often found in the center joint. The discharge light has been seen on the face of the XPLE-SIR in work. The carbonization granule which appears after the discharge is the primary cause of the insulation degradation. A sample is designed, and the alternate electric-field rise on it to imitate the operational aspect. This paper analyses the relation of the discharge light, discharge current and carbonization granule. We find that it is feasible according to study the interface discharge light to deduce the characteristic of discharge and carbonization granule, and judge the degree of the interface insulation degradation.