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E-lesson: Transformer Asset Management by “Digitizing” & “Digitalizing” Temperature Measurements

In recent years Asset Managers have been increasingly experiencing three major challenges – avoiding risk, optimizing performance and minimizing cost of operation (TOTEX). These must all be achieved under operational constraints such as ageing infrastructure, increasing scrutiny and cost competitiveness, renewable energy penetration and even an ageing or retiring workforce! In order for the utility to operate successfully under such stringent operational environment, better asset management strategies are needed. The answer is: Digitize and Digitalization of the power network – Operation of the power network based on real time based “factual data” and operational insight rather than traditional assumptions or point in time observations. Digitizing & Digitalization allows optimum utilization of assets without loss of customer service and reliability.

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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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Bhaba Das - 300 x 300

Dr. Bhaba Das is the Lead Digital Business Developer based in Singapore for Hitachi ABB Power Grids – Transformers for HUB (Asia Pacific Middle East Africa). Dr. Das currently spearheads the ABB Power Grids digital transformation initiative for transformers in the APAC region as part of the Application Engineering team. He possesses vast experience with a demonstrated history of research and innovation for the power industry:  smart transformers, arc fault protected kiosk, condition monitoring software, fibre-optic based sensors. He is a Senior Member of IEEE, Young Professional of IEC and has received the ‘New Zealand Young Engineer of the Year Award’ in 2017.


Dr. Bhaba Priyo Das

Hitachi ABB Power Grids