考虑不确定因素的配电网接地故障在线检测方法

On-line Detection Method of Distribution Network Grounding Fault Considering Uncertain Factors

配电区间接地故障的类型区分标准混乱,导致故障在线检测滞后,因此,研究考虑不确定因素的配电网接地故障在线检测方法。计算不确定因素影响下的配电网接地故障特征值,并根据特征值判断在线检测配电网接地故障区间,据此确定故障的类型分类标准,并在配电网线路中确定接地故障区间的位置,完成配电网接地故障在线检测。实验结果表明考虑不确定因素的配电网接地故障在线检测方法的故障在线检测滞后时延最高为398.0μs,说明其类型区分标准具有针对性,在线检测时间较少,实际应用效果得到保证。

The classification standard of indirect ground fault in distribution area is confused, which leads to the delay of on-line fault detection. Therefore, the on-line fault detection method of distribution network considering uncertain factors is studied. The eigenvalues of distribution network grounding fault under the influence of uncertain factors are calculated, and the on-line detection of distribution network grounding fault interval is judged according to the eigenvalues. Based on this, the classification standard of fault type is determined, and the location of grounding fault interval is determined in the distribution network line to complete the online detection of distribution network grounding fault. The experimental results show that the maximum delay of on-line fault detection is 398.0 μs. It shows that the classification standard is targeted, the online detection time is less, and the practical application effect is guaranteed.