Numerical simulation of a transformer-based test platform

Abstract

This paper investigates the utilization of esters in power transformers for their cooling and dielectric insulation properties, focusing on their potential to enhance safety and reduce environmental impact. A test platform based on a 100MVA power transformer was developed to analyze the performance of these alternative fluids in an ONAN operation regime. Using Finite Volume Method-based tools and Thermo-Hydraulic Network Models, calculations were conducted to compare the fluid behavior of an ester and a mineral oil within the test platform. The results present thermal and hydraulic data for both types of fluids, highlighting their compatibility with the transformer and adherence to industry standards. The study concludes by demonstrating the feasibility of esters for sustainable power systems and the utility of numerical simulations in predicting fluid dynamics, affirming the effectiveness of the experimental setup.