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[1]李锦彬,陈冲.基于改进 DFT 信号重构的基波正序有功和无功电流检测[J].电机与控制学报,2017,21(10):16-22.[doi:10.15938/j.emc.2017.10.003]
 LI Jin-bin,CHEN Chong.Detection method of fundamental positive active and reactive current based on signal reconstruction with improved DFT[J].,2017,21(10):16-22.[doi:10.15938/j.emc.2017.10.003]
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基于改进 DFT 信号重构的基波正序有功和无功电流检测(PDF)
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《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
21
期数:
2017年10
页码:
16-22
栏目:
出版日期:
2017-10-01

文章信息/Info

Title:
Detection method of fundamental positive active and reactive current based on signal reconstruction with improved DFT
作者:
?李锦彬12 陈冲1
?(1. 福州大学 电气工程与自动化学院,福建 福州 350108;2. 福建工程学院 信息科学与工程学院,福建 福州 350108)
Author(s):
?LI Jin-bin 12 CHEN Chong 1
(1. College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China; 2. College of Information Science and Engineering,Fujian University of Technology,Fuzhou 350108,China)
关键词:
谐波检测 DFT 信号重构 瞬时对称分量法 等角度间隔采样
Keywords:
harmonic detection DFT signal reconstruction instantaneous symmetrical component method equal angle-interval sampling
分类号:
TM 714
DOI:
10.15938/j.emc.2017.10.003
文献标志码:
A
摘要:
?为了满足复杂工况下基波正序有功、无功电流精确检测的需要,提出一种基于参考相位的改进型 DFT 算法,实现 αβ 轴系下基波电压、电流及其正交量的重构。结合瞬时对称分量变换和瞬时无功功率理论进一步提取基波正序有功、无功电流。考虑电网频率波动问题,利用等角度间隔采样原理在线跟踪电网频率变化。相比于常规的 dq 法,该方法省略了锁相环和低通滤波器,可准确、实时地求出基波正序电流的有功和无功分量。最后通过仿真和实验验证了该方法的正确性和可行性。
Abstract:
An improved DFT algorithm based on reference phase is presented for purpose of accurate detection of positive fundamental active and reactive currents under complicated conditions. Using this algorithm mentioned,the fundamental voltage and current and the corresponding orthogonal component can be reconstructed under the αβ reference frame. Then the fundamental positive sequence active and reactive current were extracted by the instantaneous symmetrical component method and the instantaneous reactive power theory. Considering frequency fluctuation of power grid,the frequency variation was tracked online with equal-angle interval sampling principle. Compared with the conventional dq transformation detection method,this method is on αβ reference frame and without the phase-locked loopand low pass filter,and the active component of fundamental positive-sequence current can be obtained exactly and quickly. At last,the efficiency and feasibility of the method is proved by simulation and experimentation

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备注/Memo

备注/Memo:
?收稿日期: 2016 - 06 - 17
基金项目: 国家自然科学基金( 61304260) ; 福建省自然科学基金( 2012J01258) ; 福建省教育厅资助项目( JA12229)
?作者简介: 李锦彬( 1973—) ,男,博士研究生,副教授,研究方向为电网谐波补偿控制技术; 陈 冲( 1954—) ,男,教授,博士生导师,研究方向为人工智能技术在电力工程中的应用。
更新日期/Last Update: 2018-02-06