Fault high frequency information-based distribution network fault location method

一种基于故障高频信息的配网故障定位方法

Abstract

The invention belongs to the power system fault location field and relates to a fault high frequency information-based distribution network fault location method. The fault high frequency information-based distribution network fault location method includes the following steps that: after a fault occurs, corresponding high-frequency impedance information is calculated according to voltage and current transient quantity measured by intelligent measuring devices; intelligent measuring devices at two sides of a T connection point of a line form an intelligent measuring device group; the magnitude relationships of the high-frequency impedance of the devices in each intelligent measuring device group on the line are compared with each other, and an area where the fault is located is determined according to comparison results, so that the fault can be repaired, and power outage time can be shortened. Compared with a traditional distribution network fault location method, the fault high frequency information-based distribution network fault location method is not affected by factors such as system operation modes and load changes, and can better satisfy requirements of practical engineering application.
本发明属于电力系统故障定位领域,特别涉及一种基于故障高频信息的配网故障定位方法。其特征在于,故障发生后根据各智能测量装置测到的电压电流暂态量计算出对应的高频阻抗信息;然后线路T接点两侧的智能测量装置组成一个智能测量装置组;比较线路上各智能测量装置组内装置的高频阻抗大小关系,以此为依据确定故障所在区域,以便修复故障、缩短停电的时间。与传统的配网故障定位方法相比,所提一种基于故障高频信息的配网故障定位方法不受系统运行方式、负荷变化等因素的影响,更加符合实际工程应用的需求。

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