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Thermal Analysis of 1000-MW Supercritical Turbo-Generator Under Hollow Strands Blocking

机译：中空阻塞下1000 MW超临界汽轮发电机的热分析

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摘要

The thermal problem in stator windings of a water-cooled 1000-MW supercritical-scale turbo-generator is investigated in this article. The two-dimensional electromagnetic field of a stator slot is calculated, and the eddy current distributions of hollow and solid strands are obtained, as well as the Field coefficients (resistance enhancement coefficient) of strands at different radial positions. Based on the determination of heat source distribution, the three-dimensional coupling simulation of the thermal and fluid fields within a tooth region in the stator are solved, from which the fluid velocities in hollow strands and ventilation duct are obtained, as well as the temperature distribution of the strands. Variations of temperature drop of the main insulation are analyzed at different positions. The temperatures of the insulation layer and water outlet are compared with the experimental results, which show that the proposed model can perform the thermal analysis with reasonable accuracy. Furthermore, temperature fields in stator windings with different blocked hollow strands are analyzed, and the effects of blocked strands locations on local temperature distributions are studied. All these would help not only to predict the degradation and damage of winding main insulation, but also to guarantee the safe operation of the supercritical generator group.
机译：本文研究了水冷式1000 MW超临界水轮发电机定子绕组中的热问题。计算定子槽的二维电磁场，得到空心和实心线束的涡流分布，以及不同径向位置的线束的场系数（电阻增强系数）。在确定热源分布的基础上，求解了定子齿区域内热场和流场的三维耦合模拟，从而获得了中空线束和通风管道中的流体速度以及温度股线的分布。分析了主绝缘在不同位置的温降变化。将保温层和出水口的温度与实验结果进行了比较，表明所提出的模型能够以合理的精度进行热分析。此外，分析了具有不同空心空心线的定子绕组中的温度场，并研究了空心线位置对局部温度分布的影响。所有这些不仅有助于预测绕组主绝缘的退化和损坏，而且还可以确保超临界发电机组的安全运行。

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  • 来源
    《Heat Transfer Engineering》 |2013年第9期|642-652|共11页
  • 作者

    CHUNWEI GUAN; WEILI LI; FEIYANG HUO; PING ZHENG;

  • 作者单位

    Harbin Institute of Technology, Harbin, China;

    Harbin University of Science and Technology, Harbin, China;

    Beijing Jiaotong University, Beijing, China;

    Address correspondence to Professor Ping Zheng, Harbin Institute of Technology, 92 West Dazhi Street, Nan Gang District, Harbin 150001, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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