Investigation of Thermal Behavior of an Oil-Directed Cooled Transformer Winding
| Autor: | Raphaël Lebreton, Nicolas Schmidt, Christian Breuer, Stefan Tenbohlen, S. Khandan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Engineering
business.industry 020209 energy Numerical analysis Flow (psychology) Energy Engineering and Power Technology 02 engineering and technology Mechanics Computational fluid dynamics Physics::Fluid Dynamics Electromagnetic coil Thermal 0202 electrical engineering electronic engineering information engineering Electronic engineering Perpendicular Particle Electrical and Electronic Engineering business Electrical conductor Physics::Atmospheric and Oceanic Physics |
| Zdroj: | IEEE Transactions on Power Delivery. 33:1091-1098 |
| ISSN: | 1937-4208 0885-8977 |
| DOI: | 10.1109/tpwrd.2017.2711786 |
| Popis: | In this contribution, the oil speed in horizontal channels of an oil-directed cooled winding is investigated by experimental and numerical methods. The presented winding model offers insight into the horizontal cooling channels perpendicular to the main oil-flow direction. To visualize oil flow, tracing particles were added to the cooling oil and illuminated by high-power light-emitting diodes. The particle velocities were then determined by taking photographs with a defined exposure time. The design of the sophisticated winding model is described in the contribution. In addition to the experimental results, this contribution presents a comparison with respective numerical results from 2-D and 3-D computational fluid dynamics calculations. Finally, numerical results from the winding model concerning the oil-flow distribution inside the winding at various operating conditions are presented. The investigation indicated a strong nonuniform oil-flow distribution on the horizontal channels. The presented results give a deep insight into the oil flow and temperature behavior of windings, enabling the designer to optimize the cooling of the power transformer windings. |
| Databáze: | OpenAIRE |
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