摘要
基于对输电线路发生故障时,用到行波波速作为故障点定位计算参量的情况,考虑到波速对故障测距精度的影响,提出一种在线测量输电线路中行波波速的方法。利用输电线路合闸时产生的操作过电压行波来进行在线测量线路的行波波速。从相模变换、小波变换理论和仿真几个方面对此方法进行分析。仿真结果表明,该方法实现简单,对提高行波故障测距精度有一定的效果。
In this paper, it is the aim to reduce the impact of traveling wave velocity in fault location system, according that the traveling wave speed is always used as a parameter to local the fault of transmission lines. This paper presents an online approach to measure traveling-wave velocity in transmission lines. This method imposes the over-voltage traveling wave produced at the moment of the circuit breaker closing operation in power transmission lines. This article analyses this method with the deeoupling transformation and wavelet transform theory. The simulation results show that the method is easy and useful to enhance the accuracy of traveling wave fault location.
出处
《电气开关》
2009年第1期43-45,49,共4页
Electric Switchgear
关键词
行波波速
在线测量
输电线路
小波变换
traveling wave speed
on-line measurement
transmission lines
wavelet transform
