【摘要】 接地极引线运行状态因直流输电系统运行模式的不同而改变,研究接地极引线故障测距需要分别考虑其不同运行状态对行波测距的影响。围绕双极方式直流输电系统接地极引线故障测距,论文提出时域脉冲测量技术和单端行波故障测距的相结合的测距方案,对基于小波变换模极大值原理的行波波头定位和去噪方法加以理论分析,借助mat-lab仿真软件对接地极引线不同故障类型的测距进行仿真验证,分析不同故障类型反射行波特征量的区别,准确定位故障点的发生位置。更多还原

【Abstract】 Grounding electrodes lead running state will change with HVDC system operation mode,changing operation state determines the complexity of the grounding electrodes leads fault location,so the influence of the grounding electrodes lead operation state should be considered for fault location.Based on above analysis,this paper puts forward a new method based on the Time Domain Reflectometry with Type A single-ended transmission line fault location principles based on travelling waves,presents a detection method of wave head via wavelet transform.On that basis,under different running state of grounding electrodes lead,the paper offers a fault locating study of three fault types with the help of the emulation software MATLAB.In the study,different traveling wave reflection feature of different fault types were discussed carefully,fault location was calculated accurately.The results show that the method can rapidly and accurately locate the line fault,distinguish the different fault type.更多还原