谐波方向型电网漏电故障选线判据的研究

Study on Line selection criterion of Harmonic Direction Type Underground High-Voltage Distribution Networks

为了充分利用矿井高压电网发生单相接地故障时的故障信息,以提高漏电故障选线正确率和准确率,提出了一种基于五次谐波比幅比相的选线判据。该判据以五次谐波固有的特性为出发点,以中性点经消弧线圈接地方式发生母线和线路接地故障为研究对象,在漏电故障正确检测并启动后利用漏电故障后五次谐波的幅值和相位的双重比较后找到最终选线结果。仿真验证了该选线判据的正确性。

To fully utilize the fault information of mine the high voltage power grid in the single-phase ground fault, In order to improve the accuracy of fault location accuracy and leakage, Put forward a line selection criterion based on the five harmonic of the comparison of the amplitude and phase. This criterion according to the five harmonic of inherent characteristics as the starting point, With the neutral point of the arc suppression coil grounding of bus and line ground fault as the research object, Find the results of the final route selection in the double comparison of the amplitude and phase of the fifth harmonic after launching the use of leakage fault. The simulation verified the correctness of the line selection criterion.