改造录波系统提高故障定位精度的实用方法研究

Research on Practical Method of Improving Fault location Precision by Transforming Fault Recorder System

提出了一种基于电压行波测距理论改造故障录波系统,提高故障测距精度的实用方法。该方法在原有的故障录波屏柜中加入二次零序电压行波采集单元,接收行波传感器的行波信号,利用保信网络将行波信息上送调度端;测距主站接收调度端保信主站转发的行波信息及故障简报,并对故障信息进行计算、显示及存储,可以达到精确故障定位。工程应用表明该方法实施简单,提高了故障录波系统的实用性能,在节约测距设备方面有明显优势。

In order to solve the low fault location precision of transmission lines in high - resistance grounding faults, a method of improving fault location precision by transforming fault recorder system is proposed. The sampling unit of second zero sequence voltage traveling wave is added into the existing fault recorder cabinet to receive travelling wave signal, and the travel-ling wave information is sent to dispatching end by relay protection and fault information network. The main station of fault location receives traveling wave information and fault presentation which is retransmitted by the main station of relay protection and fault information in dispatching end, and then the fault information is calculated, displayed and stored by the main station of fault location, which can achieve the precise fault location. The engineering application shows that the proposed method is simple to implement and has obvious advantages in reducing fault location devices.