A study on the measurement of partial discharges in XLPE power cables using planer loop sensors

This study designed a new type of loop antenna that is able to detect partial discharges based on microstrip line technology. In diagnosis of power cables, partial discharge signals are generally produced at a frequency range less than 100 MHz because high frequency PD signals are lost along a propagation path in such cables. In partial discharge measurement experiments, a commercial HFCT sensor was used as a reference sensor. Several experiments were made over HFCT and loop antenna sensors for detecting partial discharges on 22.9 kV MV XLPE cable. In this study, we showed the loop antenna designed in this study that can be applied as a commercial HFCT sensor.