基于电压暂降特征与Hausdorff距离算法的串联电弧故障检测方法  

Series arc fault detection method based on voltage sag feature and Hausdorff distance algorithm

作　　者：胡伟 杨帆 雷杨 宿磊 彭天海 王楷杰 李正天[2] 林湘宁[2] HU Wei;YANG Fan;LEI Yang;SU Lei;PENG Tianhai;WANG Kaijie;LI Zhengtian;LIN Xiangning(State Grid Hubei Electric Power Research Institute,Wuhan 430077,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网湖北省电力有限公司电力科学研究院,湖北武汉430077 [2]强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院),湖北武汉430074

出　　处：《供用电》2024年第6期64-74,共11页Distribution & Utilization

基　　金：国家自然科学基金项目(U22B20106);国网湖北省电力有限公司科技项目(52153222001G)。

摘　　要：现有串弧故障的电流检测与辨识方法受非线性负载大量接入的影响而出现检测效果不佳的现象。区别于电流检测方法,不同类型负载发生电弧故障时故障处的电弧电压大小接近,表现为负载端电压暂降值接近。根据这一原理,提出了一种基于负载端电压暂降特征与Hausdorff距离算法的串联电弧故障检测方法,以负载端电压暂降值超限作为检测启动条件,通过Hausdorff距离算法计算负载端电压波形畸变程度,当负载端电压与正弦波间的Hausdorff距离H值超限时判别为发生电弧故障,并通过仿真整定了检测启动的电压暂降阈值与辨识故障的H值阈值。试验结果表明所提检测方法不易受负载类型影响发生误判,可靠性高。The current detection and identification method for series arc faults are adversely affected by the presence of a large number of nonlinear loads,leading to poor detection accuracy.Unlike current detection methods,when different types of loads experience arc faults,the arc voltage at the fault location is similar,resulting in a voltage sag at the load side.Based on this principle,this paper proposes a series arc fault detection method based on the voltage sag at the load side and the Hausdorff distance algorithm.The method uses the exceeding of the load side voltage sag value as the detection trigger condition.It calculates the degree of distortion in the load side voltage waveform using the Hausdorff distance algorithm.When the Hausdorff distance H between the load side voltage and a sine wave exceeds a certain threshold,it is determined as an arc fault.Then,this paper provides simulation-based tuning for the voltage sag threshold for detection initiation and the H-value threshold for fault identification.Experimental results demonstrate that the proposed detection method is less influenced by load types,which has high reliability.

关 键 词：串联电弧故障 电弧电压 电压暂降 HAUSDORFF距离 波形相似度 故障诊断 

分 类 号：TM72[电气工程—电力系统及自动化]