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| 准同步离散傅里叶变换算法研究 | |
| 引用本文： | 马喆非,潘峰,宋强,李开成. 准同步离散傅里叶变换算法研究[J]. 广东电力, 2012, 25(3): 26-30 |
| 作者姓名： | 马喆非 潘峰 宋强 李开成 |
| 作者单位： | 1. 广东电网公司,广东广州,510080 2. 广东电网公司电力科学研究院,广东广州,510080 3. 华中科技大学,湖北武汉,430074 |
| 基金项目： | 国家自然科学基金资助项目（51007058） |
| 摘 要： | 介绍了准同步离散傅里叶变换(discrete foruier transformation,DFT)算法的基本原理,同时对算法进行了计算机仿真,讨论了采样起始时刻和频偏对算法测量准确度的影响,并对DFT算法和准同步DFT算法进行了比较。得到结论:准同步采样与采样起点无关;被测信号频率在一定范围内变化不影响测量结果;在一定条件下,采用准同步DFT算法能够获得较高的测量准确度。 |
| 关 键 词： | 准同步DFT算法 采样起始时刻 频偏 仿真分析 |
Study on Quasi-synchronous DFT Algorithm |
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| MA Zhefei , PAN Feng , SONG Qiaug , LI Kaicheng. Study on Quasi-synchronous DFT Algorithm[J]. Guangdong Electric Power, 2012, 25(3): 26-30 | |
| Authors: | MA Zhefei PAN Feng SONG Qiaug LI Kaicheng |
| Affiliation: | 1.Guangdong Power Grid Corporation,Guangzhou,Guangdong 510080,China;2.Electric Power Research Institute of Guangdong Power Grid Corporation,Guangzhou,Guangdong 510080,China;3.Huazhong University of Science and Technology,Wuhan,Hubei 430074,China) |
| Abstract: | This paper introduces basic principle of discrete foruier transformation（DFT） algorithm and simulates on the algorithm.Besides,it discusses on impact of start-time and end-time of sampling as well as frequency deviation on measurement precision and compares DFT algorithm with quasi-synchronous DFT algorithm.It draws a conclusion that quasi-synchronous sampling has nothing related to sampling starting point;the measured signal frequency has no impact on measurement result in certain range;under some circumstances,high measurement precision can be acquired by adoption of quasi-synchronous DFT algorithm. |
| Keywords: | quasi-synchronous DFT algorithm starting and ending time of sampling frequency deviation simulation analysis |
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