第29卷第5期 2017年10月
浙江水利水电学院学报
J. Zhejiang Univ of Wat. Res & Electric Pow.
DOI: 10. 3969/j. issn. 2095-7092. 2017. 05. 004
贺社水电站发电机电磁噪声分析与处理
姜美武，姜勇
（江山市峡口水库管理局，浙江街州324116）
Vol.29No.5 Oct.2017
摘要：针对贺社水电站3台630kW水轮发电机空载运行时产生的电磁噪声过大问题，在对其电磁噪声数据进行实测的基础上，就电磁噪声过大的原因进行了分析、研究与判定，确定系发电机定子的固有频率与磁场的激振力频率相近引起共振造成.采用加装隔音外罩、磁极斜极改造等处理方案，均未取得预期效果，最终通过电磁计算，采用改变发电机定子槽数的办法，彻底解决了定，转子槽的配合不当问题，将定子固有频率与磁场的激振力频率相近引
起共振造成的电磁噪声控制在标准范围之内，关键词：水轮发电机；电磁噪声：频率：共振
中图分类号：TM301.4
文献标志码：A
文章编号：1008536X(2017)05-0014-04
AnalysisandSolutions onGeneratorElectromagnetic
Noise in Heshe Hydropower Plant
JIANG Mei-wu,JIANG Yong
( Jiangshan Xiakou Reservior Administration Bureau , Quzhou 324116 , China)
Abstract: The reasons of excessive electromagnetie noise are analyzed , studied and determined on the basis of actual meas -urement data generated by no -load running of 3 sets of 630 kW hydraulie turbine generators in Heshe Hydropower Plant and it is confimed that such excessive electromagnetic noise is caused by resonance since the excitation foree frequency of fields is similar to the natural frequency of generator stators . The solutions, such as installing the acoustie enclosure or transforming the magnetic pole to skewed pole , failed to achieve the expected targets . The solution of changing the generator stator slot number is applied finally after carrying out the electromagnetic calculation , which completely solves the improper matching of stator slot and rotor slot , and controls the electromagnetic noise generated by resonanoe due to the above -men tioned reasons within the standard range .
Key words : hydraulic generator ; electromagnetic noise ; frequency : resonance
1概况
贺社水电站原装机2×800kW+1×630kW，
总装机容量为2230kW，由于该电站长期出力不足，加上已运行30a，电站机电设备老化严重.2012
年，电站对机电设备进行报废重建，设计装机3x 630kW,水轮机型号为HLA551c-WJ-71.配套发电机型号为SFW630-10/1180.其中发电机主要参数规格（见表1），
表1
发电机主要参数
型号
SFW63010/1180
额定功率/kw
630
收稿日期：2017-07-06
额定频率/Hz
50
主要参数
额定电压(励磁电压)/V 6 300(65)
作者简介：姜美武(1971－），男，浙江江山人，高级工程师，从事水电站技术管理工作万方数据
额定电流
（额定励磁电流）/A
72.1(225)
额定转速
（飞逸较速）/（/min）
600(1 050)