基于Hilbert变换和预设旋转频率的无锁相环电网同步基准正弦信号检测方法

doi:10.19595/j.cnki.1000-6753.tces.170224

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Abstract In the process of grid-connected new energy generation system, it is important to detect the reference sinusoidal signal of grid synchronization, especially under power grid imbalance, distortion, frequency fluctuation, frequency offset and other complex grid conditions. A method without phase-locked loop that extracts reference sinusoidal signal of gird synchronization is proposed in this paper based on the Hilbert transform and pre-set rotation frequency. First, This method transforms the positive and negative frequency components at specific time with presetting synchronous rotation frequency, eliminates the positive sequence, fundamental negative sequence and negative sequence harmonic components using the amplitude and phase characteristics of Hilbert transform and certain operations. The proposed method can accurately extract the reference sinusoidal signal of the grid synchronization under complex grid conditions, which is verified through theory and experiment.

Key words： Grid synchronization reference sinusoidal signal Hilbert transform pre-set rotation frequency without phase-locked loop

Received: 06 March 2017 Published: 24 May 2018

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TM464

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	Articles by authors
	Pan Hongbin
	Long Haihong
	Zhu Maokun
	Zhu Hongzhang
	Ou Sicheng

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Pan Hongbin,Long Haihong,Zhu Maokun等. Reference Sinusoidal Signal Detection Method of Gird Synchronization without Phase-Locked Loop Based on Hilbert Transform and Pre-Set the Rotation Frequency[J]. Transactions of China Electrotechnical Society, 2018, 33(10): 2345-2353.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170224 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I10/2345

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