35kV线路故障定位的系统研究和实现

Systematic research and relization of fault location of 35 kV lines

对35 kV线路故障定位的系统研究进行了详细的阐述,并最终实现了35 kV线路的故障定位。首先分析了35 kV线路特征,对其进行了模拟仿真。针对C型行波法计算速度快、误差大,S注入法检测速度慢、但精度高的这些特点,将这两种方法有效地结合起来,进行故障定位时分两步进行,首先用C型行波法定出大概距离,然后用S注入法准确定出故障位置并确定分支,这在很大程度上提高了故障定位的效率、准确性和可靠性。简要地介绍了C型行波法和S注入法的硬件装置。脉冲信号发生器可以是产生并发送一定幅值的不同周期和脉宽的脉冲信号。用S注入法定位的关键是硬件设备,包括S信号发生器和信号探测器。信号发生器可以产生并发出220 Hz的信号电流,信号探测器可以有效地接受并反应信号发生器的220 Hz信号。

The paper researches and realizes fault location of 35 kV line. First,the paper analyzes characteristics of 35 kV lines and simulates it. C-Traveling wave location is quick while the error is big, and S injected signal is slow while the error is small. The proposed fault location scheme combines them and locates the fault with two steps. Firstly the fault distance is calculated assumably by C-Traveling wave method. Secondly, the fault location is made sure by S injected signal method. So the efficiency, the exactitude and the credibility are proved in the most degree. At the same time ,this paper shows the hardwares equipment of C-Traveling wave method and S injected signal method： Pulse signal generator produces and sends out the pulse signal of different cycles and pulse width in the same breadth. The hardwares equipment of S injected signal method includes S signal source and a signal detector. S signal source can send out 220Hz signal current,and signal detector can receive the signal and respond to it effectively.