摘要
湖南镇水电站#2水轮发电机转子在大修试验时出现磁极交流阻抗下降和功率损耗增加的现象,将阻抗电压下降最多的#9磁极的左右出线端解开后进行了试验,分析了转子磁极发生异常的原因。故障原因除磁极绕组中金属性匝间短路外,磁极中含有金属屑的污垢也会使铁芯部分短路,指出在试验时应注意转子磁极磁路部分被间接短路后对试验数据的影响。
In the overhaul test of rotor of hydroelectric generator No.2 in Hunanzhen Hydropower Station,it was found that the alternating impedance of the magnetic pole was decreased and the power loss was increased.The left and right outlet terminals of pole No.9,the impedance voltage of which was decreased in largest scale,were unfastened,then relevant test was carried out,and the reasons of abnormal situation of the pole were analyzed.One of the reasons is metallic interturn short-circuit in the pole coil.In addition,the dirt in the pole,in which metal particles were contained,should cause local short magnetic circuit of iron core.It is pointed out that the influence of the indirect short circuit of rotor magnetic circuit on the test data should be considered in test.
出处
《华电技术》
CAS
2011年第2期55-57,80-81,共3页
HUADIAN TECHNOLOGY
关键词
转子
磁极
异常
试验
分析
rotor
magnetic pole
abnormal
test
analysis
