发电机定冷水系统不明异物的表征和分析  

CHARACTERIZATION AND ANALYSIS OF UNKNOWN FOREIGN POWDER IN THE GENERATOR STATOR WATER COOLING SYSTEM

作　　者：邱艳丽[1] 杨振国[1] 张宏鹤[1] 戚国水 张建龙[2] 刘为民[2] 

机构地区：[1]复旦大学材料科学系,上海200433 [2]浙江嘉兴发电有限责任公司,嘉兴314000

出　　处：《理化检验（物理分册）》2006年第10期515-518,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：为解决发电机定子线圈槽的异常升温现象,利用扫描电子显微镜、能谱仪等现代分析手段对300MW发电机定冷水系统不明异物进行了表征和分析。结果表明,定冷水箱中的不明异物是离子交换有机树脂、腐蚀产物氧化铜、氧化铁以及外部引入的硅胶和泥沙;过滤网中的不明异物是腐蚀产物氧化铁及碳酸钙等所组成的颗粒混合物。由于异物的堵塞导致发电机定子线圈槽的异常升温。提出了解决方法,为大型发电机组长期安全稳定运行提供了实用数据和科学依据。To solve the problem of abnormal temperature rise of generator stator slots, unknown foreign powder in the 300MW generator stator water cooling system was characterized and analyzed by SEM and EDS. The experimental results showed that the unknown foreign powder in generator stator cooling water tank was mainly ion exchange resin, ferric oxide, calcium carbonate as well as silica gel and sediment introduced from outside while the unknown powder mixture in the filter was mainly ferric oxide and calcium carbonate. The abnormal rising temperature of stator slots is due to unknown foreign powder blocking the hollow copper conductor of the generator stator. Moreover, counter measurements for solving the problem were tentatively put forward and the practical data and scientific basis for the long-term security and stability operating of large generators were thus provided.

关 键 词：不明异物 定冷水系统 表征 腐蚀 

分 类 号：TM311[电气工程—电机]