Application of PD localization technology to 110kV power cable circuit

For the partial discharge (PD) measurement of cable circuit only detecting a PD signal is insufficiency, determining the PD location is the real goal, since the purpose of PD measurement is to evaluate the PD correctly and support the maintenance of the cable reasonably. For cable circuit the PD location, the distance between PD sensor and PD source is a very important factor directly affecting the PD evaluation. In this paper, through two examples of successful PD localization at cable circuits it is shown that the analysis and judgment of the PD signals detected on-site should be better based on the comparison of a serial measurement results from PD measurement at multiple positions, joints or their link boxes, and terminations.