摘要
为了提高虚拟仪器测量电力系统谐波的精度,研究了加窗FFT插值算法的原理,对比分析了几种重要的窗函数的频谱特性,提出了将Nuttall窗插值FFT算法引入LabVIEW平台的方案,给出了算法的具体程序,并进行了仿真和实验验证.结果表明,基于Nuttall窗插值FFT的电力谐波虚拟测量仪精度高,实现方便,开发周期短,能快速地在普通PC机上完成高精度的谐波分析.
In order to improve the accuracy of power harmonic analysis based on virtual instrument, the window and interpolated FFT algorithm is studied, and the spectral characteristics of several important window functions are analyzed and compared, then the Nuttall window and interpolated FFT algorithm is introduced into the virtual instrument and the program based on LabVIEW is presented. The results of simulation and experiment show that the algorithm is simple in programming and the accuracy is high. This makes it come true to do the harmonic analysis of electrical power System on personal computer.
出处
《华北水利水电学院学报》
2013年第6期118-121,共4页
North China Institute of Water Conservancy and Hydroelectric Power
基金
华北水利水电学院青年教师基金项目(HSQJ2008020)
