Full-Scale Modeling and FBGs Experimental Measurements for Thermal Analysis of Converter Transformer
Fan Yang, Sance Gao, Gepeng Wang, Hanxue Hao, Pengbo Wang
TL;DR
Researchers created a detailed model and used sensors to study how transformer temperatures change under different loads, finding consistent trends and validating results with high accuracy.
Contribution
A full-scale thermal model of a converter transformer was developed and validated with FBG sensors, revealing detailed temperature behaviors under varying loads.
Findings
Transformer winding temperatures generally increase from bottom to top.
Internal temperature fluctuations occur within specific sections under load.
Simulation and experimental results showed a maximum discrepancy of 3.5%.
Abstract
As the imbalance between power demand and load capacity in electrical systems becomes increasingly severe, investigating the temperature variations in transformers under different load stresses is crucial for ensuring their safe operation. The thermal analysis of converter transformers poses challenges due to the complexity of model construction. This paper develops a full-scale model of a converter transformer using a multi-core high-performance computer and explores its thermal state at 80%, 100%, and 120% loading ratios using the COUPLED iteration method. Additionally, to validate the simulation model, 24 FBGs are installed in the experimental transformer to record the temperature data. The results indicate a general upward trend in winding the temperature from bottom to top. However, an internal temperature rise followed by a decrease is observed within certain sections. Moreover,…
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Taxonomy
TopicsPower Transformer Diagnostics and Insulation · High voltage insulation and dielectric phenomena · Magnetic Properties and Applications