基于频域滤波的间谐波在线检测算法

doi:10.11930/j.issn.1004-9649.2014.4.86.5

中国电力 ›› 2014, Vol. 47 ›› Issue (4): 86-91.DOI: 10.11930/j.issn.1004-9649.2014.4.86.5

基于频域滤波的间谐波在线检测算法

池源¹, 唐文左¹, 刘国平², 梁文举¹, 周念成³

1. 国网重庆市电力公司经济技术研究院,重庆 401121；
2. 国网重庆市电力公司电力科学研究院,重庆 401123；
3. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆 400044

收稿日期:2014-01-15 出版日期:2014-04-30 发布日期:2015-12-22
作者简介:池源（1986-）,男,重庆人,助理工程师,从事电能质量研究和主网规划工作。E-mail: chiyouen@me.com
基金资助:
重庆市自然科学基金资助项目（CSTC2009BB6190）; 输配电装备及系统安全与新技术国家重点实验室自主研究项目（2007DA10512709208）

On-line Detection Algorithm for Interharmonics Based on Spectrum Domain Filtering

CHI Yuan¹, TANG Wen-zuo¹, LIU Guo-ping², LIANG Wen-ju¹, ZHOU Nian-cheng³

1. State Grid Chongqing Economic Institute of Chongqing Electric Power Corporation, Chongqing 401121, China;
2. State Grid Chongqing Electric Power Research Institute of Chongqing Electric Power Corporation, Chongqing 401123, China;
3. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China

Received:2014-01-15 Online:2014-04-30 Published:2015-12-22
Supported by:
This work is supported by Natural Science Foundation of Chongqing(CSTC2009BB6190) and Independent Research Project of State Key Laboratory of Power Transmission Equipment &System Security and New Technology (2007DA105127 11209)

摘要/Abstract

摘要： 在线实时检测谐波、间谐波的幅值和相位等参数是改善电网电能质量的基础,而在线检测技术的关键是计算速度和精度。针对基波和谐波对间谐波频谱泄漏的影响,提出一种基于频域滤波的间谐波在线检测算法。该算法将信号分为基波、谐波与间谐波,先采用双峰谱线修正算法计算出谐波及基波参数,并在频域将谐波以及基波信号滤除,消除其对间谐波的频谱干扰后,再进行间谐波检测。该算法在保证测量精度的基础上,只需计算1次FFT（fast Fourie transform）,显著降低了算法所需的计算量,易于在电能质量实时在线监测装置中应用。在Matlab中比较了不同采样周期下的普通双峰谱线修正算法、基于时域和频域滤波的改进算法,验证了所提出算法的精度和计算速度。

关键词: 间谐波, 谐波, 在线监测, Hanning窗

Abstract: Magnitude and phase on-line monitoring of harmonics and interharmonics are the foundation of power quality improvement while speed and precision of the algorithm are the keys of on-line monitoring techniques. This paper studies the spectrum leakage of harmonic and interharmonic and then proposes a rapid on-line detection algorithm based on spectrum domain filtering. The algorithm divides the original signals into three parts those are fundamental signals, harmonic signals and interharmonic signals, and then filters the harmonic signals in frequency domain so as to eliminate the spectrum interference to the interharmonic signals. Thus, only one time of FFT(Fast Fourie Transform) calculation is needed, which reduces calculation burden of the algorithm remarkably with a good precision and makes the algorithm easy to be implemented in on-line monitoring device. A comparative simulation of four different interharmonic detection algorithms was conducted in Matlab to verify the feasibility and superiority of the proposed algorithm.

Key words: interharmonic, harmonic, on-line monitoring, Hanning window

中图分类号:

TM711

池源, 唐文左, 刘国平, 梁文举, 周念成. 基于频域滤波的间谐波在线检测算法[J]. 中国电力, 2014, 47(4): 86-91.

CHI Yuan, TANG Wen-zuo, LIU Guo-ping, LIANG Wen-ju, ZHOU Nian-cheng. On-line Detection Algorithm for Interharmonics Based on Spectrum Domain Filtering[J]. Electric Power, 2014, 47(4): 86-91.

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https://www.electricpower.com.cn/CN/Y2014/V47/I4/86

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基于频域滤波的间谐波在线检测算法

On-line Detection Algorithm for Interharmonics Based on Spectrum Domain Filtering

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基于频域滤波的间谐波在线检测算法

On-line Detection Algorithm for Interharmonics Based on Spectrum Domain Filtering

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