基于动态时间规整的输电线路单相短路接地故障识别  

Single-Phase Short-Circuit Ground Fault Identification of Transmission Line based on Dynamic Time Warping

作　　者：谢奕尘 杨斌 李振璧 陈夫进 XIE Yichen;Yang Bin;LI Zhenbi;CHEN Fujin(Department of Electronics and Information Engineering,Bozhou University,Bozhou Anhui 236800,China;State Grid Shandong Electric Power Company Weishan Electric Power Company,Weishan Shandong 277600,China)

机构地区：[1]亳州学院电子与信息工程系,安徽亳州236800 [2]国网山东省电力公司微山县供电公司,山东微山277600

出　　处：《辽宁科技学院学报》2023年第4期8-11,33,共5页Journal of Liaoning Institute of Science and Technology

基　　金：安徽省教育厅高校自然科学重点研究项目“基于机器视觉的不透明瓶装白酒内可见异物检测的研究”(KJ2019A1307);亳州学院自然科学研究一般项目“基于CAN总线控制的原酒自动摘酒系统研究”(BYZ2018C01).

摘　　要：针对目前电力系统输电线路故障信息分析的计算繁琐、计算工作量大及耗时长等实际情况,应用动态时间规整算法(Dynamic Time Warping,DTW),实现输电线路单相短路接地故障的识别。该方法只需计算规整路径距离(Warp Path Distance,WPD)就能精确识别出故障相,首先随机选取一条输电线路设置单相短路接地故障,然后提取故障线路两端节点的各相电流作为故障信号,计算两端节点各相电流的DTW距离,基于各相电流的DTW距离识别输电线路故障,并与变分模态分解与排列熵算法(Variational Mode Decomposition and Permutation Entropy,VMD-PE)进行对比,选取IEEE 14节点标准测试系统验证。实验结果表明,所用DTW方法比传统方法更能快速识别出输电线路的故障所在相,具有很高的工程价值。Aiming at the problems such as complicated algorithm,large amount of calculation and long time-consuming for the analysis method of transmission line fault signals in existing power systems,the dynamic time normalization algorithm(Dynamic Time Warping,DTW)is applied to realize the identification of single-phase short circuit grounding fault of transmission line.This method only calculates the normalized path distance(Warp Path Distance,WPD)to accurately identify the fault phase.First,a transmission line is randomly selected to set up a single-phase ground fault,and then each phase current at both ends of the faulty line is extracted as the fault signal,and the two nodes are calculated.The DTW method distance of the phase currents is used to identify transmission line faults based on the DTW distance of each phase current and compared with the variational mode decomposition and permutation entropy algorithm(VMD-PE).The IEEE 14-node standard test system is selected for verification.The experimental results show that the proposed DTW method can identify the phase of the fault of the transmission line more quickly than the traditional method.It has a fairly high engineering value.

关 键 词：故障识别 单相短路 动态时间规整 输电线路 

分 类 号：TM711[电气工程—电力系统及自动化]