Transformer Asset Management by “Digitizing” & “Digitalizing” Temperature Measurements

Digitization is achieved by the use sensors which enable temperatures (and other key parameters) to be available for intelligent devices, where as “Digitalization” is the use of this data in digital technologies to impact how the task in hand can be best achieved. Digitization also improves the accuracy of temperature measurements as these are not traditional capillary based instruments and have the ability to use exact values of parameters needed for the thermal model.

Such intimate knowledge of temperature and condition, which is continuously available in real time feeds directly to the concept of digitalization. Digitalization allows the following:

·        Increased reliability and reduced risk of unplanned outages.

·        Reduced maintenance costs due to reliability centered maintenance

·        Loss of transformer thermal life tracking.

·         Trending and comparison of key parameters over time.

·        Advanced cooling – fans could be started at the instant increase in temperature is detected rather than have to wait till steady state higher temperatures are encountered.

The e-lesson # 2 presents how digitization and digitalization of temperature ensures a paradigm shift in transformer management and how this provides the foundation for future digitalization requirements.

Keywords: Digitalization, Asset Management, Electronic Temperature Monitor, Dynamic Rating, Loss of life

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