配电网混合线路单相弧光接地故障检测新方法

暂态量是单相接地故障最显著的特征,但暂态零序电流持续时间较短,对故障检测造成困难。基于暂态零序电流包含大量的高次谐波且持续时间可达到约一个周期,提出如下配电网混合线路单相弧光接地故障检测新方法:建立Habedank电弧模型,通过分析暂态零序电流的频谱特性,求取其特征频带,滤取特征频带内的暂态零序电流实现接地故障检测,并用方向信息进行校验。仿真分析结果验证了该算法具有快速、准确、抗干扰性好的特点。

A New Detection Approach for Single-Phase Arc Grounding Fault of Distribution Mixed Feeders

The transient quanlity is the most significant features when a fault occurs. But its short duration makes it difficult to de-tect the fault.Because of the transient zero sequence current contains a large number of high harmonic, which up to a cycle dura-tion,the paper presents a novel algorithm for single phase arc grounding fault location of distribution network.The Habedank arc modle is built. According to analyse the spectral characteristics of the transient zero-sequence current,the feature band is found. The amplitude and direction of transient zero-sequence current within the feature band is filtrated to detect the arc grounding fault. Simulation results demonstrate that the proposed algorithm is fast and accurate anti-jamming of the good characteristic.