Design and Analysis for Stator Cooling Structure of Air-Cooled Hydrogenerator

doi:10.7652/xjtuxb201912015

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Design and Analysis for Stator Cooling Structure of Air-Cooled Hydrogenerator

更新时间：2025-07-09

- Design and Analysis for Stator Cooling Structure of Air-Cooled Hydrogenerator
- Vol. 53, Issue 12, Pages: 111-119(2019)
- 作者机构：
  
  哈尔滨理工大学电气与电子工程学院,哈尔滨,150080
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201912015
  CLC： TM312
- Online First：10 December 2019，
  
  Published：2019
- 稿件说明：
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Design and Analysis for Stator Cooling Structure of Air-Cooled Hydrogenerator[J]. 2019, 53(12): 111-119.
DOI：

Design and Analysis for Stator Cooling Structure of Air-Cooled Hydrogenerator[J]. 2019, 53(12): 111-119. DOI： 10.7652/xjtuxb201912015.

摘要

为改善空冷水轮发电机的通风冷却效果

研究了电机定子冷却结构的设计与性能分析方法。以一台250 MW空冷水轮发电机为例

考虑定子绕组换位、槽钢、槽楔形状和各通风沟间的相互影响等因素

构建了定子流固耦合的物理模型和数学模型; 采用数值法计算了每根股线的损耗; 基于流体传热理论和定子温升特点

通过改变电机内定子铁心和通风沟的结构尺寸

提出了3种定子冷却结构; 对比不同结构下求解区域内流体场和温度场

给出了电机定子最优的冷却结构。最后

通过实验对建模的准确性和方法的可行性进行验证

结果表明

相比通风沟轴向长度

铁心段轴向长度对定子槽内绕组温升影响更大

合理调整电机定子通风沟和铁心段的数量和轴向长度

可有效降低槽内换位绕组的最高温度。

Abstract

To improve the ventilation cooling effect of air-cooled hydrogenerators

the design and performance analysis methods of the stator cooling structure are investigated. Taking a 250 MW air-cooled hydrogenerator for example

the factors of stator winding transposition

channel steel

slot wedge shape and the interaction among ventilation ditches are considered to construct the physical model and mathematical model of stator fluid-solid coupling

and the loss of each strand is numerically evaluated. According to fluid heat transfer theory and temperature rise characteristics of the air-cooled hydrogenerator stator

three design strategies are proposed by changing the structural dimensions of the stator cores and the ventilation grooves in the generator. Comparing the fluid and temperature fields in the solution region for different structures

the optimal cooling structure of the generator stator is obtained. The accuracy of the model and the feasibility of the method are experimentally ve

关键词

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references

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