基于VMD和TEO的高压输电线路雷击故障测距研究  

Study on Lighting Fault Locating of High-voltage Transmission Lines Based on VMD and TEO

作　　者：高艳丰[1,2] 朱永利[1] 闫红艳[2] 武英杰[1] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),保定071003 [2]河北工程大学水电学院,邯郸056038

出　　处：《电工技术学报》2016年第1期24-33,共10页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金资助项目(2014xs74)

摘　　要：针对传统行波检测中小波模极大值法对于基函数和分解尺度的高要求以及希尔伯特黄变换(HHT)方法中经验模态分解(EMD)存在的模态混叠现象,提出一种基于变分模态分解和Teager能量算子相结合的高压输电线路雷击故障行波检测方法。针对行波波速及线路实际长度的不确定性给测距结果带来的影响,结合故障行波在线路中的传播途径,推导出一种新的双端行波测距算法,该算法的测距结果不受行波波速的影响。将该方法应用到雷击点和故障点定位,解决了雷击点和故障点不一致时的故障定位问题。EMTDC仿真结果验证了该方法的正确性及有效性。In view of high requirements for the basis function and the decomposition scale of the wavelet modulus maxima method and the modal aliasing phenomenon existed in empirical mode decomposition of Hilbert Huang transform method in traditional traveling-wave detection approaches,a new detection method based on the variational mode decomposition（ VMD） and the Teager energy operator（ TEO） for high voltage transmission line lightning fault locating is proposed. To eliminate the impact of the uncertainty of the wave velocity and the actual line length on distance measurement, a novel double-terminal traveling wave distance measuring algorithm combined with the propagation route of the fault traveling wave in the transmission line is deduced,which will not be affected by the wave velocity. This method can solve the fault locating problem successfully when the lightning strike point and the fault point are inconsistent. Abundant EMTDC simulation results verify the correctness and the effectiveness of the proposed method.

关 键 词：行波检测 变分模态分解 TEAGER能量算子 双端行波测距 雷击定位 

分 类 号：TM726.1[电气工程—电力系统及自动化]