新型同步调相机转子匝间短路故障定位方法  

Fault location method for rotor inter-turn short circuit of new synchronous condenser

作　　者：孙川 徐钢[1] 李成博 蔚超 王伟[2] 程明[2] SUN Chuan;XU Gang;LI Chengbo;WEI Chao;WANG Wei;CHENG Ming(Jiangsu Frontier Electric Power Technology Co.,Ltd.,Nanjing 211100,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]江苏方天电力技术有限公司,江苏南京211100 [2]东南大学电气工程学院,江苏南京210096

出　　处：《电力工程技术》2024年第1期238-245,共8页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(51991384)。

摘　　要：转子绕组匝间短路故障是新型同步调相机的一种典型故障,对调相机长期运行和电网稳定都有严重影响。为保障新型同步调相机高可靠稳定运行,文中提出一种转子绕组匝间短路故障在线诊断与定位的方法。从故障导致的气隙磁场磁动势畸变出发,推导出定子同相两支路将出现偶次谐波环流现象,并通过对支路环流进行傅里叶分解,提取谐波中的明显特征量。对该特征量进行分析,得出其大小仅与故障所在转子上的空间位置有关,而与故障匝数无关的结论,最后通过查表的方式来实现故障诊断与定位。文中基于已规模投入使用的TTS-300-2型同步调相机开发有限元软件的仿真模型,并搭建基于新型调相机的模拟机实验平台进行实验。仿真与实验结果验证了利用支路环流谐波进行转子匝间短路故障定位的有效性。The inter-turn short circuit fault of wingding is a typical serious fault of the new synchronous condenser,which has a serious impact on the long-term operation of the condenser and the stability of the power grid.In order to ensure the reliable and stable operation of the new synchronous condenser,a method of online diagnosis and location of rotor inter-turn short circuit fault is proposed in this paper.Based on the distortion of the air-gap magnetic field magnetomotive force caused by fault it is deduced that the phenomenon of even harmonic circulation will occur in the same phase and double branches of the stator.Through Fourier decomposition of the branch circulation,the obvious characteristic quantity of harmonics is extracted and analyzed.It is concluded that the characteristic quantity is only related to the spatial position of the rotor where the fault is located,and has nothing to do with the number of fault turns.Therefore,this characteristic quantity can help realize fault diagnosis and location.Based on the TTS-300-2 type synchronous condenser which has been put into use on a large scale,a simulation model is established with the actual condenser in the finite element software while an experiment platform is developed with a condenser simulator for experiments.The simulation and experimental results validate the effectiveness of locating rotor inter turn short circuit faults through branch circulating current harmonics.

关 键 词：同步调相机 匝间短路故障 磁动势 故障定位 有限元 转子绕组 

分 类 号：TM342[电气工程—电机]