利用动力学原理研究行波信号  

Study on Traveling Wave Signal Based on Dynamic Principle

作　　者：李毅[1,2] 吴政球[1] 李建奇[3] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]国网张家界供电公司,湖南张家界427000 [3]湖南城市学院,湖南益阳410004

出　　处：《高压电器》2016年第8期57-63,共7页High Voltage Apparatus

基　　金：湖南省科技计划项目(2011FJ3195;S2012GK2014)资助~~

摘　　要：针对行波在电网传输过程中存在畸变现象,文中以某110 k V电网(共计15个变电站节点)为例,对行波传播过程进行了仿真,分析了行波到达时间与传播路径的关系,及各站点行波信号的时频域特性。利用EMD-HHT算法计算得到行波的到达时间,利用动力学理论计算了行波头前0.5 ms(共计1 000个样点)波形的Kolmogorov熵及分维数F,研究发现:行波信号的K熵及分维数F随传播距离增加,呈减少趋势,且邻近线路或环网节点的指数分布数值相近,该结论可定性判断行波源的大致位置。Aiming at the distortion phenomenon during the travelling wave transmission in power system,one 110 kV power grid （a total of 15 substations node） is built to simulate the travelling wave propagation in this paper, the relationship between the traveling wave arrival time and propagation path, the site traveling wave signal time- frequency domain characteristics are analyzed. EMD-HHT algorithm is used to calculate the arrival time of traveling wave, Kolmogorov entropy and fractal dimension F for the first 0.5 ms wave of the traveling wave （a total of 1 000 samples）are calculated by using dynamics theory. The paper concludes that, values of K and F of traveling wave take on decreasing trend with the propagation distance increases, and the index distribution value for adjacent lines or ring network node is similar, so this conclusion can be applied to qualitatively distinguish the roughly position of the traveling wave source.

关 键 词：行波 畸变 传播 动力学 

分 类 号：TM75[电气工程—电力系统及自动化]