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 se-quence 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 lo-cation 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 .
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