基于曲线拟合的电缆故障点精确定位方法

Accurate Positioning Method of Cable Fault Point Based on Curve Fitting

摘要: 电缆故障是电网运行过程中常见的故障类型之一，如何根据仪器测得的故障距离确定电缆故障点的位置坐标是电缆故障测寻人员非常重要的工作。本文提出了基于曲线拟合的电缆故障点三维坐标定位方法。该方法通过二次函数拟合电缆在地平面上的xy坐标走向曲线，通过一次函数拟合电缆在埋深上的xz坐标走向曲线。基于本文方法开发了一套电缆故障点快速定位软件，软件的应用可提高故障点测寻精度，加快故障处理速度。

Abstract: Cable fault is one of the common fault types in power system. Based on the data of detected fault distance, determination of the of the cable fault point coordinate is very important for the cable fault repair work. In this paper, a 3D coordinate location method for cable fault point based on curve fitting is proposed. In the proposed method, the XY coordinates of the cable in the ground plane are fitted to the quadratic curve. The XZ coordinates of the cable are fitted to the linear curve on the depth of the buried depth. Based on the proposed method, a set of software for fault location of cable is developed. The application of the software can improve the accuracy of fault position finding and speed up the fault processing.