基于相位差的同步调相机定子绕组匝间短路故障定位方法  

A Fault Location Method of Stator Winding Inter-turn Short Circuit for Synchronous Condenser Based on Phase Angle Difference

作　　者：王伟[1] 黄思遥 王小虎 蔚超 程明[1] 邓富金 WANG Wei;HUANG Siyao;WANG Xiaohu;WEI Chao;CHENG Ming;DENG Fujin(School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China;Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing 211102,Jiangsu Province,China)

机构地区：[1]东南大学电气工程学院,江苏省南京市210096 [2]江苏方天电力技术有限公司,江苏省南京市211102

出　　处：《中国电机工程学报》2023年第18期7268-7276,共9页Proceedings of the CSEE

基　　金：国家自然科学基金(面上项目)(51977036)。

摘　　要：为了改善同步调相机机组的运维效率,提出一种基于相位差的同步调相机定子绕组匝间短路故障定位方法。首先,在线获取三相电流的相位、零序电压基波分量的幅值及相位。如果零序电压基波分量的幅值超过阈值,则认为定子绕组发生匝间短路。为了进一步实现故障相的定位,将零序电压基波分量相位分别与三相电流相位进行比较,获得3组相位差,则匝间短路故障发生在3组相位差中最小值所属相的定子绕组中,从而实现故障定位。为了验证所提方法的准确性和有效性,分别基于TTS-300-2型同步调相机和小型电励磁同步电机搭建相应的仿真模型和实验平台,进行仿真与实验验证。实验结果表明:利用零序电压基波幅值可以诊断同步调相机是否发生匝间短路故障,利用零序电压基波与各相定子电流基波间的相位差可以实现故障定位。In order to enhance the maintenance efficiency,a fault location method based on the phase angle difference is proposed to cope with the inter-turn short circuit fault in the stator winding of synchronous condensers.First,the phase angle of three-phase current,the magnitude and the phase angle of the fundamental zero-sequence voltage are obtained.If the fundamental zero-sequence voltage magnitude exceeds the threshold value,the inter-turn short circuit fault in the stator winding is detected.To locate the faulty phase,the phase of the fundamental component of zero-sequence voltage is compared with each phase of the three-phase current,respectively;thus,three groups of phase differences can be obtained.Then the turn-to-turn short-circuit fault occurs in the stator winding of the phase to which the minimum of the three groups of phase differences belongs,so as to realize fault location.To validate the effectiveness of the proposed fault location method,the simulation model is established by using a TTS-300-2 synchronous condenser,while a small synchronous machine develops the experimental platform to obtain the simulation and experimental results.The experimental results show that the amplitude of the zero sequence voltage fundamental wave can be used to diagnose whether the synchronous condenser has an inter turn short circuit fault,and the phase difference between the zero sequence voltage fundamental wave and the stator current fundamental wave of each phase can be used to achieve the fault location.

关 键 词：同步调相机 匝间短路故障 相位差 零序电压 定子电流 

分 类 号：TM342[电气工程—电机]