Comparison of off-line and on-line partial discharge MV cable mapping techniques

Following the development of a robust on-line monitoring solution, EDF Energy has now started to carry out routine online mapping tests on its underground medium voltage (MV) cable network. This paper describes the latest developments and compares on-line and off-line mapping techniques as well as results. It finally discusses how these new on-line techniques will impact on longer-term preventive maintenance and replacement strategies.