281 / 2022-03-15 00:53:18

Characterization of partial discharge automatic processing functionalities by means of a GIS and cable system scale model

partial discharge,condition monitoring,Pattern Recognition,Small-scale,modeling method

It is a common fact that technology developers of partial discharge (PD) monitoring systems have difficulties to test new automatic functionalities or the improvements in the existing ones. This is because usually, complex laboratory setups or even real facilities in operation are required for the necessary repetitive measurements. Moreover, due to the stochastic phenomena of PD activity, the performance of controlled tests for comparison purposes in laboratory or real facilities, is not possible. In this paper, a solution for the characterization of PD automatic processing tools in a standardized way anywhere and anytime is presented. This solution is based on the implementation of a scale tests model designed to simulate two GIS substations connected to a three phase cable system. An analog signals generator is used for the generation of PD activity and noise conditions in a controlled way. The scale model together with the signal generator are useful for testing PD monitoring applications automatic functionalities. Technical aspects are considered to reproduce a real GIS - power cable facility. The presentation of various case studies shows the advantages of the procedure developed for the characterization of the automatic processing tools. Several tests are performed in the scale model to validate PD monitoring systems automatic functionalities such as sensitivity in the detection, noise rejection capability and defect location and identification. An appropriate comparison of different monitoring technologies is possible. The possibility to perform PD measurements in a controlled way is a requirement of interest for many developers and electrical companies.