摘要
输电线路损伤的定位及类型识别对于保障电力系统安全运行有着重要的意义。提出了基于超声导波的输电线路无损监测方法并进行了实验验证。实验采用磁致伸缩换能器产生和接收超声导波,对钢绞线地线的断股损伤进行了检测研究,通过得到的实验信号可以确定损伤位置,并对损伤信号进行时频分析,研究损伤信号与损伤程度的关系。实验验证了该方法的可行性。
The positioning and the type recognition of transmission line damage are of great significance to ensure the security and stability of power system.In this paper,a non-destructive monitoring method for transmission line using ultrasonic guided waves was proposed and validated by experiment.The ultrasonic guided wave was produced and received using magnetostrictive transducer to detect the broken stocks damage of steel strand.And the damage location can be determined through the experiment signals.Finally,the time-frequency analysis for damage signals was made to research the relationship between damage signals and injury.Experimental results demonstrate the feasibility of the proposed method.
出处
《江苏电机工程》
2011年第5期24-26,共3页
Jiangsu Electrical Engineering
关键词
超声导波
输电线
无损监测
磁致伸缩效应
ultrasonic guided waves
power transmission line
non-destructive monitoring
magnetostrictive effect
