Condition assessment of power cable accessories using advanced VHF/UHF PD detection

This paper introduces a new advanced partial discharge detection system for detecting partial discharge activity in the accessories of power cables during the acceptance test. The system consists of three autonomous PD measuring systems which communicate via a wireless communication network with one main computer. As a result, the measured data of each measuring unit can be displayed and analyzed at one single point near e.g. the voltage source which makes easy communication between the measuring technician and test engineer possible. Based on several field measurements performed in Europe on different 380 kV and 150 kV cables systems aspects of measurement and data processing are discussed