摘要
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。
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.
出处
《电测与仪表》
北大核心
2012年第1期17-21,共5页
Electrical Measurement & Instrumentation
