故障测距中的差分傅氏滤波改进算法  

Improved difference FFT algorithms for fault location

作　　者：黄飞腾[1] 陈明军[1] 郑慧[1] 

机构地区：[1]浙江工业大学信息工程学院,浙江杭州310014

出　　处：《电力系统保护与控制》2009年第11期62-65,共4页Power System Protection and Control

摘　　要：针对电力故障信号提出了差分傅氏滤波的改进算法,用构造补偿角的思想,解决了相角差值问题,并提高了精度。Matlab仿真实验比较了四种算法对仿真信号的滤波结果,表明了该改进算法滤波计算量较少,精度高,滤除衰减直流分量和谐波分量的能力强;追加实验表明了改进算法受非整数次谐波的影响较小。将各滤波算法应用于Matlab故障测距仿真系统,验证了改进算法适用于各种故障类型信号的滤波,计算量较少并能提高测距精度。For the power failure signal, this paper proposes an improved difference FFT algorithm with the idea of setting compensation angle to solve the problem of phase margin and increase accuracy. Compared the filtering results of four algorithms to the simulation signal, MATLAB simulation shows that this filtering algorithm is of less calculation, high precision, good at filtering decaying DC component and harmonic component. Additional experiment shows that the non-integral harmonic less affects this algorithm. Applied the filter algorithms to MATLAB fault location simulation system, it is verified the improved algorithm is appropriate for various types of signal failures of filtering with less calculation and the higher accuracy of location.

关 键 词：傅氏滤波 差分 故障测距 

分 类 号：TM755[电气工程—电力系统及自动化]