经消弧线圈接地系统的混合线路故障测距研究

Study on Fault Location of Hybrid Line with Arc Suppression Coil Grounding System

以中性点经消弧线圈接地系统的混合输电线路为研究目标,利用EEMD提取由单端故障电流行波折反射所形成的固有频率来进行故障精确测距的方法进行了深入研究。有效地解决了中性点经消弧线圈接地系统的混合输电线路难以用常规方法精确定位的问题。

In this paper, the hybrid transmission line with the neutral point through the arc-suppression coil grounding system is taken as the research target. The method of extracting the natural frequency formed by the single-end fault current traveling wave reflection to solve the fault location is studied in depth. The accuracy of the ranging is improved by the relationship between the natural frequency, the boundary conditions of the line parameters, and the fault distance. The fault location method proposed in this paper effectively solves the problem that the hybrid transmission line of the neutral point arc-suppres- sion coil grounding system is difficult to be accurately positioned by conventional methods. It is of great significance for the fast and accurate positioning of transmission lines and the safe operation of power grids.