This work presents an analytical methodology for synchronous generators turn-to-turn faults protection. This type of fault involves only one winding of the stator where a number of turns are shorted. The proposed method is based on morphological filters applied to the stator phase currents and terminal phase voltages. The algorithm of the methodology has been implemented in MATLAB and its threshold requires basic input parameters. All tests have been carried out with HYPERSIM software using a phase-domain synchronous machine model, which can represent real features, such as, parallel-connected windings. Comparisons with existing methods have been done considering the ability to detect or not turn-to-turn faults. The results show that the proposed method can detect turn-to-turn faults in generator stators, even when few turns of winding are short-circuited. Furthermore, the analytical procedure is secure against external faults. Due to the results achieved the algorithm proved to be very robust.

这项工作提出了一种同步发电机匝间故障保护的分析方法。这种类型的故障仅涉及定子的一个绕组，其中许多匝短路。所提出的方法基于应用于定子相电流和端相电压的形态滤波器。该方法的算法已在MATLAB中实现，其阈值需要基本输入参数。所有测试均使用 HYPERSIM 软件使用相域同步电机模型进行，该模型可以代表真实特征，例如并联绕组。考虑到检测或不检测匝间故障的能力，已经与现有方法进行了比较。结果表明，所提出的方法可以检测发电机定子的匝间故障，即使绕组的几匝短路。此外，分析过程是安全的，不会受到外部故障的影响。由于所取得的结果，该算法被证明是非常稳健的。