故障因素变量对行波传输特性影响的仿真分析  

Simulation Analysis of the Influence of Fault Factor Variables on Traveling Wave Transmission Characteristics

作　　者：刘鹏宇 LIU Pengyu(UHV Branch of State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang,Hebei 050070,China)

机构地区：[1]国网河北省电力有限公司超高压分公司,河北石家庄050070

出　　处：《山西电力》2023年第3期10-14,共5页Shanxi Electric Power

摘　　要：为保证行波故障测距法测距精度与可靠性,需要分析故障因素变量对行波传输特性产生的影响。以小波变换理论为工具,利用Matlab/Simulink仿真平台搭建双边供电模型,选取过渡电阻与电源初相角为故障因素变量,通过改变其在仿真模型中的参数设定,分析不同参数值下发生单相故障后故障相电压行波及其小波变换波形。结果表明,行波的传输具有稳定性,虽波形易受影响但并不影响行波首波头抵达测量端的时刻。In order to ensure the accuracy and reliability of traveling wave fault location method,it is necessary to analyze the influence of fault factor variables on traveling wave transmission characteristics.In this paper,the wavelet transform theory is used as a tool,and the Matlab/Simulink simulation platform is used to build a bilateral power supply model.The transition resistance and initial phase angle of power supply are selected as fault factor variables.By changing their parameter settings in the simulation model,the fault phase voltage traveling wave and its wavelet transform waveform are analyzed after single phase fault occurs under different parameter values.The results show that the transmission of traveling wave is stable.Although the waveform is easily affected,it does not affect the time when the first traveling wave head reaches the measuring end.

关 键 词：传输特性 小波变换 过渡电阻 电源初相角 行波首波头 

分 类 号：TM75[电气工程—电力系统及自动化]