同杆架设双回线自适应故障测距研究

An Adaptive Fault Location Algorithm for Double Parallel Transmission Line

线路故障的快速、准确定位与诊断,是目前对同杆架设双回线在运行情况下进行故障定位需要解决的问题。以故障分析法为基础对用集中参数表示的同杆架设双回线的单线故障测距算法以及测距系统进行了研究。故障测距算法在参考双回线运行相关算法的基础上,推广到一回线停电检修和一回线单端三相跳闸运行方式。针对不同运行方式下不同故障类型分别推算了测距算法,并通过具体实例和设计的MATLAB程序验证了所推算法的正确性。同时,实例结果证明了所推算法简单易解,具有不受系统阻抗类型、过渡电阻、负荷电流等因素影响的特点。平行双回线运行方式和故障类型的判别结合相应的测距算法构成了完整的故障测距系统,从而使得测距系统具有自适应能力。该方法具有很好的工程应用价值。

On the operating mode of double parallel tmansmission line,to locate and diagnose the fault quickly and accurately is a problem to be resolved. This article, on the basis of fault analysis, studies the adaptive location algorithm for double parallel transmission line and the locating system experssed by central index. This method has been used in one blackout line maintenance power-cut and one line of three-phase jump. Based on various faults under different operating modes, the location algorithm is designed and certified by concrete examples and MATLAB programs. These examples prove that this algorthm has the character of without inphence of the transmission resistance and the load current. It is a complete fault location system and has great value in power engineering.