摘要
与传统小波方法相比,提升小波方法具有计算简便、计算速度快等优点。在分析故障暂态信号特性的基础上,采用经过db5提升的第二代小波作为新的工具进行故障时刻的检测。利用MATLAB仿真工具对单回线电力系统线路进行故障仿真,给出了不同故障类型下故障时刻和测距结果及其相对误差,仿真结果表明经过db5提升的第二代小波能正确提取故障时刻,具有很高的计算精度和速度。
Compared with traditional wavelet,lift wavelet has the features such as convenient computation and fast computing speed.On the basis of analyzing the characteristics of transient fault signals,the fault moment can be acquired by using the second generation of wavelet lifted db5.By means of the MATLAB a simulation is carried on to a single line power system and the fault location,the fault moment and its errors for different types of faults are given.Simulation results of actual faults show that the fault moments can be correctly acquired by the second generation of wavelet lifted by db5,and the calculation accuracy and speed are satisfying.
出处
《江苏电机工程》
2007年第5期28-31,共4页
Jiangsu Electrical Engineering
