Simulation Study and Detection Position Analysis on Position of Partial Discharge Detection in XLPE Cable Cross-bonding System

In the long-distance XLPE power cable partial discharge detection, due to the existence of cable jacket cross-interconnect structure, the defect phase of the partial discharge signal will flow into the other two-phase cable jacket, making the signal detection and analysis are very difficult. To determine the position and the difference of the discharge source, the XLPE cable cross-connect system is simulated and modeled. Combined with the actual measurable points in the process of live detection, the time domain characteristics and distribution of the signals at different detection points are simulated. The simulation results show that the pulse time domain characteristics of different detection points are quite different, which is closely related to the position of the discharge source and the grounding form of the joint. It can be judged by selecting the appropriate detection points and synthesizing the signals of each detection point. The connection of the discharge source and the difference.