一种高精度的改进傅里叶测频算法  

AN IMPROVED HIGH-ACCURACY ALGORITHM FOR FREQUENCY MEASUREMENT BASED ON FOURIER TRANSFORM

作　　者：磨少清[1] 李啸骢[2] 

机构地区：[1]广西民族学院物电系,广西壮族自治区南宁市530006 [2]广西大学电气工程学院,广西壮族自治区南宁市530004

出　　处：《电力系统自动化》2003年第12期48-49,54,共3页Automation of Electric Power Systems

摘　　要：通过严谨的理论推导 ,揭示了传统傅里叶测频算法存在的误差 ,并由此提出了一种能有效消除这种误差的改进测频算法。数字仿真和实际应用表明 ,该算法的计算精度高 ,而且能实现宽范围的测频 。Based on theoretic derivation, this paper reveals the causes of error existing in the traditional Fourier frequency-tracking algorithm. Furthermore, an improved algorithm, which can eliminate the error, is proposed in the paper. Digital simulation and field applications show that this algorithm improves the output-data accuracy, can track the variations of the frequency in a wide range and has met the requirement of frequency measurement for power system automation devices.

关 键 词：频率测量 电力系统 傅里叶变换 相角差 

分 类 号：TM935.1[电气工程—电力电子与电力传动]