Abstract

This paper describes the features and benefits of ultra high frequency (UHF) partial discharge monitoring (PDM) systems for gas-insulated switchgear (GIS). The main features of two high-performance PDM systems are described in detail including explanations of the data displays, and the interpretation of partial discharge data by expert systems. The benefits of such monitoring systems are summarized by evaluation of statistical data. An outlook for future PDM system features is given.

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