Partial Discharge Measurement as Diagnostic Tool for Power Cable Systems. Literature Review.

摘要

Insulation of cable and accessories may be defected or deteriorated in installation (laying) and in use. After laying tests with diagnostic measurements should detect faults and defects caused by transports and installation. Successful measurements give fingerprint for further diagnostics during the service of the cable system. Partial discharges are one of the major reasons for degradation of cable system insulations in service. Thus, PD measurement is an important diagnostic tool. This report deals with PD test and measurement methods on medium and high voltage cable systems on-site, in connection of both after laying commissioning tests and periodic diagnostic tests. PD measurements on-site on-line (in service) are also covered especially with high voltage cable systems. Electrical acoustical and optical PD detection and measurement methods are reviewed based on literature.