基于声磁同步原理电力电缆故障定位的研究

The Study of the Power Cable Fault Location Based on the Acoustic and Magnet Synchronous Principle

通过查阅大量资料选用了一种基于声磁同步法的精确故障定位方法,并设计了声、磁信号传感器,使电力电缆精确定位更为直观。首先用脉冲发生器对电缆施加放电脉冲,此时故障点就会释放出声音信号与电磁信号,而电磁信号的传播速度接近光速瞬间到达故障点,在检测到电磁信号后通知单片机定时器T1对内部机器周期计数,直到检测到声音信号为止,由液晶屏显示测量结果,并沿着电缆寻找时间值最小点即为故障点所在的位置,其方法对电网的可靠运行具有积极作用。

This paper introduces an accurate fault location method beased on the principle of the magnetic and sound synchronization, throung searching a large number of papers . We designed the acoutic signal sensor and magnetic sig- nal sensor, which makes the power cable to pinpoint more intuitive. First, the pulse generator applies a discharge pulse to the cable, and then the fault point will release the audio signals and the electromagnetic signals. As the propa- gation speed of electromagnetic signals accrose to the speed of light, the electromagnetic signal arrives the failure point momentarily. When the microcontroller detectes the electromagnetic signals, the T1 timer will be counting until the sound signal is detected . At last the LCD displaies measurement results, and where the results is the minimum value is where the location of the point of failure is.