Presentation
Workshop on:
"Use of natural and synthetic esters for retrofilling transformers: environment and fire risk reduction"
Roma, November 9, 2023
Globally, many hundreds of mineral oil immersed transformers have been retrofilled with alternative insulating liquids.
Retrofilling transformers with natural and synthetic esters can prolong technical life and provide a liquid insulation which is environmentally friendly with improved fire safety. Retrofilling old/healthy transformers had been practiced by global end users as an effective approach of asset management and was considered as a contribution to the circular economy.
Moreover, retrofilling with ester liquids are recognized to be helpful for the carbon peak/neutrality prospective of many countries and regions. In some countries, the demand of retrofilling is growing with the size of power grids; it is also believed that thousands of units of mineral transformers will be retrofilled in coming years.
However, a comprehensive international guideline for retrofilling is not yet available and for this reason, during the 2022 IEC TC10 Plenary Meeting, China National Committee proposed the preparation of an IEC Technical Report hoping for a larger participation of Experts of both IEC TC10 and TC14. Implementing this request, TC10 launched a new TC10/TC14 Joint Working Group which will start its activities in the following months. One scope of this technical work is to provide operators with good practices that will provide a high level of safety by limiting the content of residual mineral oil.
The workshop at the Italian Firefighters Authority will bring together invited speakers with many electrical industry guests to better explore these current issues.
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