Monitoring partial discharges in power networks: Contribution to the energetic distribution security

This paper presents some general considerations on the transient phenomena in power networks which are a key point in the security of any power supply system. In this context, some detection techniques employed in their analysis will be addressed. Among these techniques, a special attention will be given to the analysis of the transient signals associated with the partial discharges (PDs), as follows : spectrogram, high order statistics (HOS) with wavelets and complex time distribution. Results on realistic data will point out on the potential of each type of method.