Abstract This paper presents an integrated method to identify the fault direction in the presence of a series compensator via also identifying the power flow direction. The presented method relies on monitoring both measured angle of the positive-sequence (PS) currents and magnitude of PS voltage. The change of PS voltage magnitude is used to detect the current inversion case. The presented criteria depend on the power flow direction before the fault occurrence. Therefore, a power flow direction identification method is presented using only the change of the phase angle of the PS current. Different system configurations are investigated to test the reliability of the proposed protection scheme (PPS). The power and protection systems’ configurations contain different capacitor ratios leading to current and voltage inversion scenarios, reversing the power flow direction and single-pole tripping. Simulation experiments conducted via the software ATP-EMTP has shown the proper operability of the PPS.

中文翻译：

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存在串联补偿线路的方向继电器的集成方案

摘要 本文提出了一种在串联补偿器存在的情况下通过识别潮流方向来识别故障方向的综合方法。所提出的方法依赖于监测正序 (PS) 电流的测量角度和 PS 电压的幅度。PS 电压幅值的变化用于检测电流反转情况。提出的标准取决于故障发生前的潮流方向。因此，提出了一种仅利用PS电流相位角变化的潮流方向识别方法。研究了不同的系统配置以测试所提出的保护方案 (PPS) 的可靠性。电源和保护系统的配置包含导致电流和电压反转场景的不同电容器比率，反转潮流方向和单极跳闸。通过软件 ATP-EMTP 进行的模拟实验显示了 PPS 的正确可操作性。