考虑母线分布电容影响的单端行波测距法

分析了单端电压行波中各种可能存在的波头,得出了不考虑母线分布电容的方法不能完整地实现第2个反向行波识别的结论.推导了电压行波在分布电容处的传播特性,指出电压行波在分布电容处的初始反射系数恒为负.利用这个结论,提出了一种新型的第2个反向行波识别方法.理论分析和仿真结果表明,这种方法具有很高的可靠性,且不受线路两端母线类型的影响.

Single Ended Fault Location Approach Considering Bus Distributed Capacitance Effect

This paper analyzes possible surges in the single ended voltage traveling wave. Conclusion has been made that the approach without considering bus distributed capacitance can't accomplish the identification of the second reverse traveling wave accurately. That is, the promulgation characteristics of traveling wave at the shunt capacitor are deduced. Furthermore it is found that the initialized reflection coefficient of voltage traveling wave is always negative. With this conclusion, a new approach is proposed to identify the second reverse traveling wave. Theoretical analysis and simulation results show that the method proposed is of great reliability and applicability.