一种电网谐波与间谐波分析新方法

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Abstract This paper presents a novel power system harmonic and interharmonic analysis method based on S-transform and TT-transform. By using the spectral properties of diagonal elements of TT-transform and interpolation algorithm, the paper proposes a high precision measurement algorithm to detect steady harmonics and interharmonics, and solves the problem that the high frequency harmonics and interharmonics in power system is too less to detect. For dynamic harmonic and interharmonic analysis, the paper uses spectral analysis of diagonal elements of TT-transform to calculate frequency, amplitude and other parameters of each frequency component in signal, and accurately determines the beginning and ending time of each frequency component by analyzing the result of S-transform and detecting the amount of mutation of TT-series. Simulation results verify the feasibility and effectiveness of the proposed method in steady, dynamic harmonic and interharmonic analysis.

Key words： Harmonic detection S-transform TT-transform diagonal element time-frequency analysis

Received: 19 September 2012 Published: 25 March 2014

PACS:

TM935

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	Huang Chun
	Zhu Zhijun
	Cao Yijia
	Wang Feng
	Li Canbing
	Dong Xuzhu

Cite this article:

Huang Chun,Zhu Zhijun,Cao Yijia等. A Novel Power System Harmonic and Interharmonic Analysis Method[J]. Transactions of China Electrotechnical Society, 2013, 28(9): 32-39.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I9/32

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