Investigation of Thermal Behavior of an Oil-Directed Cooled Transformer Winding

被引：37

作者：

Tenbohlen, Stefan ^{[1
]}

Schmidt, Nicolas ^{[1
]}

Breuer, Christian ^{[2
]}

Khandan, Saeed ^{[1
]}

Lebreton, Raphael ^{[3
]}

机构：

[1] Univ Stuttgart, Inst Power Transmiss & High Voltage Technol, D-70569 Stuttgart, Germany

[2] GE Grid Solut, R&D Engineer Power Transformers Dept, D-41065 Monchengladbach, Germany

[3] GE Grid Solut, R&D Engineer Power Transformers Dept, F-92900 Puteaux La Defense, France

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2018年 / 33卷 / 03期

关键词：

Power transformer; oil-directed cooling; optica investigation; thermal modelling; computational fluid dynamics; oil-flow rate; POWER TRANSFORMER; HEAT-TRANSFER; FLUID-FLOW; MODEL; DESIGN;

D O I：

10.1109/TPWRD.2017.2711786

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：1091 / 1098

页数：8

共 23 条

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