Partial discharge detection in oil with optical methods

The partial discharge measurement is a very well known possibility to assess the quality of an insulation system of high voltage devices, because the life of high voltage equipment depends on the present of partial discharge. The aim is the detection of a beginning destruction in the electrical insulation as a result of electrical stress. A multiplicity of different partial discharge sources and their appearances show different physical and electrical characteristics. For the measuring, physical effects, such like optical, electrical and acoustical appearances, will be used. New methods for the detection of partial discharge have become more importance in last years. In the working field of technical diagnostics alternatives to the conventional partial discharge (PD) measuring techniques are looked for, with the aim to evaluate the insulation condition of electrical equipment.