基于相电压电流突变量特征的配电网单相接地故障区段定位方法

发布时间：2018-07-07 07:54

本文选题：智能配电网 + 相电压电流　；参考：《电网技术》2017年07期

【摘要】：为了克服现有配电网单相接地故障区段定位方法通信量大以及零序电压和电流较难获取而不易于实现的缺点,提出了一种基于相电压电流突变量特征的区段定位方法。对配电网的故障特征分析得出当发生单相接地故障时,在特征频带内健全线各区段的各相、故障线各区段的非故障相以及故障点下游各区段故障相的电流突变量与相电压突变量的导数满足正相关;故障线路故障点上游的各区段故障相的电流突变量与相电压突变量的导数满足负相关;离母线最远的相关系数为负的区段就是故障区段,相关系数全为正则母线故障。PSCAD仿真验证了该方法可在各种故障情况下可靠判别故障区段。
[Abstract]:In order to overcome the disadvantages of the existing single-phase grounding fault section location methods, such as the large communication amount and the difficulty of obtaining zero sequence voltage and current, a section location method based on the abrupt change of phase voltage and current is proposed. By analyzing the fault characteristics of the distribution network, it is concluded that when a single-phase grounding fault occurs, the phases of each section of the line will be perfected in the characteristic band. The current abrupt amount of the non-fault phase and the fault phase downstream of the fault line is positively correlated with the derivative of the phase voltage mutation. There is a negative correlation between the current mutation amount and the derivative of the phase voltage mutation in each section upstream of the fault line, and the section with negative correlation coefficient farthest from the bus is the fault section. The correlation coefficient is all regular busbar fault. PSCAD simulation shows that the method can reliably distinguish the fault section in various fault cases.
【作者单位】：西安交通大学电气工程学院;珠海许继电气有限公司;
【基金】：国家电网公司科学技术项目(52020116000F) 广东省科技计划项目(2015B010128006)~~
【分类号】：TM862

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