A flux-based technique is proposed for the on-line detection, localization and discrimination of stator and rotor turn-to-turn faults in synchronous generators, using the measured air-gap rotational magnetic field. Simple magnetic field sensors (MFSs) are installed in the stator slots at different regions, and the corresponding induced voltages are measured. Several differential voltages are then obtained to give a picture of the rotational magnetic field symmetricity, whose distortions indicate the presence of the stator or rotor faults. The proposed diagnostic technique is presented in detail and validated initially by simulation results obtained with a finite element simulation package and afterwards through the experimental tests. The obtained results demonstrate that the proposed technique can be used to detect and discriminate stator and rotor turn-to-turn faults with appropriate sensitivity. In addition, the region of the stator turn-to-turn faults can be identified as well.

中文翻译：

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基于旋转磁场畸变的同步电机定转子绕组匝间故障检测、判别及故障区域识别

提出了一种基于通量的技术，用于使用测量的气隙旋转磁场对同步发电机中的定子和转子匝间故障进行在线检测、定位和鉴别。简单的磁场传感器（MFS）安装在不同区域的定子槽中，并测量相应的感应电压。然后获得几个差分电压以给出旋转磁场对称性的图片，其失真表明存在定子或转子故障。所提出的诊断技术被详细介绍并通过有限元仿真包获得的仿真结果进行初步验证，然后通过实验测试进行验证。获得的结果表明，所提出的技术可用于以适当的灵敏度检测和区分定子和转子匝间故障。此外，定子匝间故障的区域也可以被识别。