基于小波包全频带分析和OS-ELM的小电流单相接地故障选线  

Fault Line Selection of Single Phase Grounding Based on Wavelet Packet Full Frequency Analysis and OS-ELM

作　　者：嵇文路 赵晓龙 张明 杨红磊 翁嘉明[3] JI Wen-lu;ZHAO Xiao-long;ZHANG Ming;YANG Hong-lei;WENG Jia-ming(State Grid Jiangsu Electric Power Co., Ltd. Nanjing Power Supply Branch, Nanjing Jiangsu, 210019, China;China Electric Power Research Institute, Beijing 100192, China;Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]国网江苏省电力有限公司南京供电分公司,南京210019 [2]中国电力科学研究院有限公司,北京100192 [3]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240

出　　处：《哈尔滨理工大学学报》2021年第2期110-117,共8页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51677116);江苏省电力有限公司科技项目(J2018110-2).

摘　　要：为提高配电网单相接地故障特征提取的有效性以及实现对故障选线的准确判别,提出了一种基于小波包全频带分析和在线序贯极限学习机(OS-ELM)的新的故障选线分析方法。本文灵活运用小波包的多分辨率分频特性,提取了小电流单相接地故障暂态信号的特征量;利用OS-ELM将批处理和逐次迭代相结合,不断更新训练数据和网络结构,实现了对单相接地故障线路的快速选取。仿真实验结果表明:利用小波包全频带分析能够获得更有效的故障特征,OS-ELM在测试时间和诊断精度上都优于该反向传播(BP)网络、径向基网络(RBF)和支持向量机(SVM),说明了所提方法在单相接地故障选线的有效性,更能满足在线应用需求。In order to enhance effectiveness of single-phase ground fault feature extraction and to achieve exactly identification of fault line selection,a new fault line selection method of single phase grounding fault based on wavelet packet and online sequential extreme learning machine(OS-ELM)is proposed.In this paper,the fault characteristics of fault transient signals are extracted by using the multi-resolution frequency division characteristics of wavelet packets.Combining batch and successive iterative,and constantly updating the training data and network structure,to achieve quickly fault line selection of single-phase grounding.The simulation results show that the more effective fault characteristics can be obtained using wavelet packet full frequency analysis,and OS-ELM is superior to the back propagation(BP)network,radial basis function network(RBF)and support vector machine(SVM)in test time and diagnostic accuracy.The proposed method is effective in the single phase grounding fault line,can better meet the needs of online application.

关 键 词：小波包全频带分析 在线序贯极限学习机 故障选线 

分 类 号：TM711[电气工程—电力系统及自动化]