Calculation on Thermal Field of a Doubly-Fed Induction Generator with Axial-Radial Ventilation Cooling System

Abstract:

A type of doubly-fed induction generator with air-water cooling and axial-radial ventilation cooling system is proposed in this paper. A half-axial segment stator-rotor coupled thermal field 3D model of the doubly-fed induction generator prototype is built with some properly assumptions, according to its symmetry in electromagnetic structure and cooling system. Stator-rotor coupled thermal field distribution of prototype is calculated under rated operating. The influence of water mass-flow and number of cooling-ribs to the thermal field distribution is also studied with the 3D model.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 7004-7010
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.7004
• Online since: November 2011
• Authors: Zhi Qiang Zhang, Bao Jun Ge
• Keywords: Axial Ventilation, Radial Ventilation, Thermal Field Calculation

References

[1] Ding Shunnian. Heating and cooling of large electrical machine[M]. Beijing, Science Press, 1992, pp.138-176.

[2] Tao Wenshuan. Numerical Heat Transfer[M]. Xi'an, Xi'an Jiaotong University Press, (2001).

[3] Wen Jiabin, Meng Dawei, Lu Changbin. Tynthetic calculation for the ventilation and heating of large waterwheel generator[J]. Proceedings of the CSEE, 2000, vol. 20 (11), pp.115-119.

[4] Yao Ruoping, Rao Fangquan. Research on stator thermal field of evaporation cooling hydro-generator[J]. Proceedings of the CSEE, 2003, vol. 23(6), pp.87-90.

DOI: 10.1109/iemdc.2003.1210348

[5] Li Weili, Jin Huiyong, Ding Shuye. Numerical calculation and analysis of large synchronous generator stator multidimensional fluid fields and surface heat transfer coefficients[J]. Proceedings of the CSEE, 2005, vol. 25 (23), pp.138-143.

DOI: 10.1109/cefc-06.2006.1633184

[6] Wen zhiwei, Gu Guobiao. Calculation of rotor temperature field for solid pole synchronous motor[J]. Large electric machine and hydraulic turbin, 2005, (2), pp.1-5.

[7] Armor A F，Chari M V K．Heat flow in the stator core of large turbine generators by the method of three-dimensional finite elements. Part Ⅰ: Analysis by Scaler Potential Formulation; Part Ⅱ: Temperature Distribution in the Stator ron[J]. IEEE Trans. on PAS, 1976, vol. 95(5) pp.1648-1668.

DOI: 10.1109/t-pas.1976.32265

[8] Zhang Dawei, Tang Yunqiu. 3d stator thermal field calculation in the hottest-segment of turbogenerator on the basis of finite element method[J]. Transaction on Harbin Institute of Technology, 1992, vol. 5(3), pp.186-194.

[9] V.K. Garg. Electro-Thermal coupled analysis of canned induction motor [J]. IEEE Tran. On Energy Conversion, 1990, vol. 5(1)., p.110~113.

DOI: 10.1109/60.50821

[10] Zou Jibin, Zhang Hongliang, Jiang Shanlin, Chen Xia. Analysis of 3D transient temperature field for torque motor in the state of steady electromagnetic field[J]. Proceding of CSEE, 2007, vol. 27(21), pp.66-70.

[11] Li Deji, Bai Yamin, Cao Guoxuan. 3D transient temperature field calculation of generator[J]. Proceeding of CSEE, 1989, vol. 9(5), pp.56-63.

[12] Zhang Dawei, Tang Yunqiu. 3D stator thermal field calculation in the hottest-segment of turbogenerator on the basis of finite element method[J]. Transaction on Harbin Institude of Technology, 1992, vol. 5(3), pp.186-194(in Chinese).

[13] Li Weili, Hou Yunpeng, Zhou Feng. Heating analysis of stator strands of large hydro-generator based on numerical method[J]. Proceeding of CSEE, 2001, vol. 2(7), pp.115-119(in Chinese).

[14] Maximini M, Koglin H. Determination of the absolute rotor temperature of squirrel cage induction machines using measurable varables[J]. IEEE Transactions on Energy Conversion, 2004, vol. 19(1), pp.34-39.

DOI: 10.1109/tec.2003.821833

[15] Lee S, Habetler T G. An evaluation of model-based stator resisitance estimation for induction motor stator winding temperature monitoring[j]. IEEE Transactions on Energy Conversion, 2002, volu. 17(1), pp.7-15.

DOI: 10.1109/60.986431