一种利用行波自然频率的杆塔故障定位新方法

发布时间：2018-06-30 21:13

本文选题：杆塔 + 故障定位　；参考：《电力系统自动化》2014年05期

【摘要】：为解决传统基于行波自然频率的单端故障测距方法在单相或远距离故障时测距精度不高的问题,提出了一种基于行波自然频率的杆塔故障定位新方法,该方法对主自然频率辨识精度不敏感,具备较好的抗差性能,提高了单相或远距离故障情况下的测距效果。通过辨识线路两端故障电流中的主自然频率值,并根据行波主自然频率值与故障距离间的倒数关系,由线路两端的主自然频率值之比,确定故障距离占线路全长的比例。仿真结果表明,所述方法故障定位精度高、稳定性好,定位结果不受季节、弧垂变化及故障距离和故障类型的影响,利于实际现场中故障位置的查找。
[Abstract]:In order to solve the problem that the accuracy of single terminal fault location based on traveling wave natural frequency is not high in single phase or long distance fault location, a new method of pole and tower fault location based on traveling wave natural frequency is proposed. This method is insensitive to the identification accuracy of the main natural frequency and has better robust performance. It improves the location effect in the case of single phase or long distance fault. By identifying the main natural frequency of the fault current at both ends of the line and according to the reciprocal relation between the main natural frequency of the traveling wave and the fault distance, the proportion of the fault distance to the total length of the line is determined by the ratio of the main natural frequency value at the two ends of the line. The simulation results show that the method has high accuracy and good stability, and the location results are not affected by season, sag variation, fault distance and fault type, which is conducive to finding fault location in actual field.
【作者单位】：武汉大学电气工程学院;深圳供电局有限公司;
【分类号】：TM753

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