1. School of Electrical Engineering and Automation Lanzhou Jiaotong University Lanzhou 730070 China; 2. State Grid Gansu Maintenance Company Jiuquan 735000 China
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.
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2020, Vol. 35 
