感应电能供电技术下含间谐波的谐波信号重构

doi:10.19595/j.cnki.1000-6753.tces.191336

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Abstract When inductive power supply (IPS) technology was adopted, acquisition of the harmonic signals contain inter-harmonic signals due to spectrum leakage and grid effects caused by asynchronous sampling. Aiming at this phenomenon, a new type of spectral projected gradient with line interpolation correction (SPG-LIC) was proposed to reconstruct harmonic signals with inter-harmonics. Firstly, the short-range spectrum leakage was suppressed by fast Fourier transform after adding window and made the transformed signal have high sparseness. Secondly, the multi-spectral interpolation algorithm was introduced to suppress the long-range spectrum leakage and gate effect. Finally, by estimating the signal sparseness, the original signal was reconstructed by using the spectral projection gradient algorithm and compared with other reconstruction algorithms. The simulation results show that the SPG-LIC algorithm has a higher reconstruction signal-to-noise ratio, accuracy and shorter reconstruction time than other reconstruction algorithms.

Key words： Inductive power supply inter-harmonic signal spectrum leakage fast Fourier transformation spectral projected gradient with line interpolation correction (SPG-LIC) algorithm

Received: 16 October 2019

PACS:	TM72
	TM935

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