WHITEPAPER: UHF Partial Discharge Monitoring System in Service: Generating and responding to PD alarms

How Artificial intelligence techniques can be used to create an Expert System that will intelligently generate alarms in the presence of Partial Discharge (PD) activity within Gas insulated switchgear (GIS). In addition the appropriate practical response to those alarms for in-service GIS is explained and discussed relative to a practical example.

The most common causes of electrical failure in GIS generate Partial Discharge (PD) activity in advance of complete breakdown. It has been shown that the UHF method provides a sensitive and reliable method of detecting PD.The UHF method developed over 20 years ago in the UK has been adopted worldwide and is in common use by GIS manufacturers and utilities.