基于序分量法的低压电网故障定位

低压配电网覆盖范围广、拓扑复杂,系统发生故障时准确的故障定位尤为关键。文章以历史数据为基础,采用序分量法开展故障定位,该方法首先构建分支线路历史库,库中包括序分量信息及拟合函数。当故障发生时,首先比对各节点首端序分量差值,找出差值最小的分支作为故障区域;然后,利用拟合函数中位置和序分量的关系,求解具体位置;最后,选取云南某地实际线路为仿真对象,仿真结果证明了文章所提方法的准确性和可靠性。

The coverage of low-voltage distribution network is wide and the topology is complex,so it is particularly important to accurately locate the fault of the system when a fault occurs.In this paper,based on the historical data,the sequence component method is used to locate the fault.Firstly,the branch line history database is constructed,which includes sequence component information and fitting function.When a fault occurs,we should first compare the difference of the first sequence components of each node,and find out the branch with the smallest difference as the fault area;then,we should use the relationship between the position and sequence components in function fitting to solve the specific location;finally,we can select the actual line in Yunnan as the simulation object for the simulation,and the results show that the proposed method is accurate and reliable.