On the nature of the discharges in samples fed by bipolar pulse like voltage and its possible impact on the detection of partial discharge in machines fed by inverter

This paper deals with Partial Discharge (PD) detection in a twisted pair fed by a bipolar square shape voltage using a non-intrusive sensor. These discharges are hardly detected, yet harmful, in such an environment and it may be caused by the nature of the discharge itself. Thus, the aim of this work is to investigate the nature of the discharge using an intensified CCD camera to follow the temporal evolution of the light distribution on a controlled sample.