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	Inter-harmonics estimation by Pisarenko harmonic decomposition method
	Wang Zhi-qun ; Zhu Shou-zhen ; Zhou Shuang-xi
	2010-05-06 ; 2010-05-06
关键词	Practical Theoretical or Mathematical/ eigenvalues and eigenfunctions polynomial matrices power system harmonics/ interharmonics estimation Pisarenko harmonic decomposition method electric power system nonlinear equipment signal auto-relation matrix eigen-space partition signal subspace noise subspace eigenpolynomial equation algebraic equation low-pass differentiator/ B8120L Power supply quality and harmonics B0290H Linear algebra (numerical analysis)
中文摘要	Along with the development of electric power system and the wide application of nonlinear equipments or devices, the harmonics in power networks became more complicated, besides the harmonics of integer times to fundamental component the inter-harmonics and sub-harmonics exist and are in special status. Here, the Pisarenko harmonic decomposition (PHD) method is applied to calculate the frequencies and magnitudes of various components. Based on the signal auto-relation matrix the PHD method divides the eigen-space partition into signal subspace and noise subspace and according to the principle that the two subspaces are orthogonal the eigenpolynomial and algebraic equations are constructed to obtain frequency and amplitude of each order of harmonics respectively. Because in PHD method it is assumed that the phase angles of various frequency components of harmonics are randomly distributed, so the phase angle information cannot be obtained. Combining the given example, the susceptibility factors of PHD method are analyzed. For the phenomenon that the estimation results are affected by the difference between the energy of harmonic components and that of the fundamental component, a solution of low-pass differentiator are proposed and a better result is obtained.
语种	中文 ; 中文
出版者	Electr. Power Res. Inst ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/10970]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Zhi-qun,Zhu Shou-zhen,Zhou Shuang-xi. Inter-harmonics estimation by Pisarenko harmonic decomposition method[J],2010, 2010.
APA	Wang Zhi-qun,Zhu Shou-zhen,&Zhou Shuang-xi.(2010).Inter-harmonics estimation by Pisarenko harmonic decomposition method..
MLA	Wang Zhi-qun,et al."Inter-harmonics estimation by Pisarenko harmonic decomposition method".(2010).

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