3D Electromagnetic-Temperature Field Close-Coupling Calculation of Losses and Heat in the Damper Winding of a Large Tubular Hydro-Generator

• Published in: Journal of electrical engineering & technology Vol. 14; no. 3; pp. 1255 - 1268
• Main Authors: Wen, Kun, Han, Li, Zhou, Zhi-ting, Fan, Zhen-nan, Liao, Yong, Wang, Jun, Sun, Zhang, Yao, Bing, Zhang, Bi-de
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.05.2019; 대한전기학회
• Subjects: Electrical Engineering; Electrical Machines and Networks; Electronics and Microelectronics; Engineering; Instrumentation; Original Article; Power Electronics; 전기공학; 3D electromagnetic; Close-coupling calculation; Losses and heat; temperature field; Damper winding; Tubular hydro-generator
• ISSN: 1975-0102; 2093-7423
• DOI: 10.1007/s42835-019-00143-8

To obtain more precise and rational calculation details of the loss and heat of a damper winding in a tubular hydro-generator, this study develops a three-dimensional, finite-element, electromagnetic-temperature field close-coupling model of the damper winding. On the basis of multi-physical field coupled theory, the model fully considers the temperature effects of the damper winding resistivities and heat conductivities, and the eddy current loss in the end region of the damper winding. The model was verified by direct tests of the damper winding temperature. Unlike the conventional weak-coupling model, the proposed close-coupling model fully captures the interaction between the electromagnetic and temperature fields. Therefore, of the model more accurately and reasonably calculates the loss and heat of the damper winding than the conventional model. The proposed calculation model can properly assess the loss and heat of damper windings in large hydro-generators, which is helpful for improving the design standards of hydro-generators.