一种软件同步采样DFT的谐波检测方法  

A Harmonic Measurement Method Base on the Software Synchronous Sampling DFT Algorithm

作　　者：劳永浩[1] 姚普粮 何小阳[1] 

机构地区：[1]广西大学电气工程学院,南宁530004 [2]北海市深蓝科技发展有限责任公司,广西北海536000

出　　处：《电气技术》2011年第5期39-41,共3页Electrical Engineering

摘　　要：目前基于DFT算法的谐波检测方法应用相当广泛,然而以往的DFT算法都没能有效地解决好实时性与精确度的问题,实时性好则精确度较低,反之精确度高而实时性略差。本文通过对现有方法的研究,提出了一种高精度的软件同步采样法。仿真结果表明,该方法在保证得到较高的测量精度的同时,还能每两个信号周期更新一次数据,提高了实时性。DFT algorithm is widely used in harmonic measurements.However,it hasn＇t dealt very well with real-time and accuracy in the existing methods.Usually,good real-time goes with bad accuracy while good accuracy goes with bad real-time.By studying the existing methods,the root cause of the problem dueto the synchronous error is found.Thus,a high accuracy software synchronous sampling method is propoesd.The simulation result shows that it achieves both high accuracy and good real-time.

关 键 词：谐波检测 同步采样 DFT 滤波 

分 类 号：TM935.2[电气工程—电力电子与电力传动]