基于三迭代算法的输电线路故障测距方法

提出了一种基于改进的联合对角化算法的故障测距方法,能较为精确地确定输电线路故障距离。该方法首先对含有丰富故障信息的高频暂态分量进行相模变换,然后分别用FFT和TIA分析所选的模分量,结合两种算法的结果,确定出相邻两个固有频率之差,进而计算出故障距离。用MATLAB对-例500kV输电系统进行了算例仿真,结果表明,该方法能较为准确地提取出固有频率之差,测距精度很高。

A Method of Power Transmission Line Fault Location Based on TIA

This paper presents a new technique of accurate fault location based on an improved joint diagonalization algorithm —TIA.It employs the fault generated high-frequency transients,which contains abundant fault information.The FFT algorithm and TIA algorithm are combined to analyze the selected mode component of the fault generated high-frequency transients to accurately found the difference of the adjacent natural frequencies and realize the fault location.A typical 500kV system in MATLAB is used to verify the performance.The simulation results show that the proposed method can improve the accuracy of fault location.