大型同步发电机断股故障情况下电磁场和温度场的计算与分析

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1063 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Taking a 150MW air-cooled turbine-generator as an example, the two-dimensional electromagnetic field analysis model is established. By using finite element method (FEM), the electromagnetic field and parameters of the generator operating under rated load with broken strands in windings are analyzed, by which the distribution laws of magnetic density in air-gap, stator slots and tooth bottom are studied. Then the variation of direct and quadrature axis synchronous reactance in generators with and without broken strands are comparatively researched. Based on some reasonable assumptions, three-dimensional temperature field calculation model of stator within tooth-space is established. From the electromagnetic analysis, heat sources distributions in generators with different broken strands are obtained, and stator three-dimensional temperature field are calculated. The change tendencies of temperature distribution in the stator without and with different broken strands are analyzed and the influence of broken strands on the maximum value of temperature and its appeared location are analyzed. From the studies some conclusions are obtained, which could provide some theory reference for some issues such as safe operation of generator with broken strands.

Key words： Turbo-generator broken strands electromagnetic field direct and quadrature axis reactance temperature field

Received: 11 May 2010 Published: 07 March 2014

PACS:

TM311

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Yin Qiaoyu
	Li Weili
	Yu Haitao
	Sun Hongli

Cite this article:

Yin Qiaoyu,Li Weili,Yu Haitao等. Calculation and Analysis of Electromagnetic Field and Temperature Field Under Broken Strands for a Large Synchronous Generator[J]. Transactions of China Electrotechnical Society, 2011, 26(2): 59-67.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I2/59

[1] 刘书学, 魏景生, 蒋卫东. 220MW空冷汽轮发电机定子嵌线工艺研究[J]. 大电机技术, 2006(4): 24-26.
[2] 周怀理. 发电机定子线棒漏水和断股的原因分析[J]. 大电机技术, 1999(2): 18-19.
[3] 初国清. 发电机定子绕组开路隐患的诊断[J]. 华北电力技术, 1995(1): 28-36.
[4] 乔彦利, 刘聚辰, 张岩. 汽轮发电机定子绕组直流电阻不平衡故障诊断方法[J]. 河北电力技术, 2005, 1(24): 8-10.
[5] 汤蕴璆, 梁艳萍. 汽轮发电机的三阶模型和超—超瞬态电抗[J]. 电工技术学报, 2000, 15(7): 7-11.
[6] 刘晓芳, 蒙亮, 罗应立, 等. 同步发电机d-q轴饱和特性曲线族[J]. 中国电机工程学报, 2002, 22(2): 68-72.
[7] 汤蕴璆. 电机内的电磁场[M]. 2版. 北京: 科学出版社, 1998.
[8] 陈世元. 交流电机磁场的有限元分析[M]. 哈尔滨: 哈尔滨工程大学出版社, 1998.
[9] 王红宇, 李和明, 罗应立, 等. 耦合网络模型和有限元模型计算巨型水轮发电机定子温度场的比较研究[J]. 中国电机工程学报, 2008, 28(8): 136-142.
[10] 李伟力, 丁树业, 靳慧勇. 基于耦合场的大型同步发电机定子温度场的数值计算[J]. 中国电机工程学报, 2005, 25(13): 129-134.
[11] 温志伟, 傅德平, 顾国彪. 浸润式混合强迫内冷的蒸发冷却汽轮发电机定子三维温度场的仿真分析[J]. 电工电能新技术, 2006, 25(3): 13-17.
[12] 丁树业, 李伟力, 马贤好, 等. 特殊绕组结构的空冷汽轮发电机定子三维温度场计算与分析[J]. 中国电机工程学报, 2006, 26(22): 140-145.
[13] 程树康, 李伟力, 侯云鹏. 基于耦合边界条件的发电机定子非线性温度场计算[J]. 电工技术学报, 2002, 17(4): 1-6.
[14] Li Weili, Chai Feng, Zhao Fen. Study on eddy current loss and heat-transfer character of stator windings in synchronous generator[C]. IEEE ICEMS, 2008: 17-20.
[15] 李伟力, 周封, 侯云鹏, 等. 基于流体相似理论和三维有限元法计算大中型异步电动机的定子三维温度场[J]. 中国电机工程学报, 2000, 20(5): 14-17.
[16] 丁舜年. 大型电机的发热与冷却[M]. 北京: 科学出版社, 1992.
[17] 李俊卿, 李和明. 汽轮发电机定子铁心端部温度模型中参数的确定[J]. 中国电机工程学报, 2005, 29(3): 69-72.
[18] 姚若萍, 饶芳权. 蒸发冷却水轮发电机定子温度场研究[J]. 中国电机工程学报, 2003, 23(6): 87-90.