New Method to Identify Transformer Inrush Current Based on FFT and SVM

摘要：

　　To improve transformer longitudinal differential protections reliability,this paper deeply analyzes generation mechanism and characteristic of transformer inrush current,and uses PSCAD/EMTDC software to simulate 188 kinds of transformer operation states.They are including internal fault current,inrush current and no-load closing with internal fault.On the background of those simulations,it proposes a simple and accurate method to identify inrush current based on SVM.SVM selects Gaussion Kernel,and takes three-phase differential current,fundamental,secondary harmonic and third harmonic as characteristic quantities.Many cross-validation results verify that the training SVM has high accuracy.This method can identify inrush current and internal fault current (including no-load closing with internal fault current) rapidly and accurately.It takes less time,and is easy to perform.

关键词： FFT SVM transformer protection inrush current internal fault current

作者: Maofa Gong Guoliang Li Wenhua Xia Honglin Yan Jingwen Qu Xiaoyu Wang

作者单位: Shandong University of Science and Technology,Qingdao,Shandong Province,China

会议类型: 国际会议

会议名称: 2012 2nd International conference on Machinery Electronics and Control Engineering (2012年第二届国际机械电子与控制工程会议(ICMECE 2012))

会议地点: 济南

会议语种:英文

页码: 887-890

在线出版日期: 2012-12-29（万方平台首次上网日期，不代表论文的发表时间）