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This work presents two new techniques to generate harmonic RF signals using optical fiber devices. Both proposed systems are efficient to generate up to 15th harmonic from a 1 GHz RF signal. This systems have the advantages of simplicity, low cost of implementation and the ability to generate multiple harmonics from the frequency signal provided by a RF generator.
This work presents an analysis of four topologies of Phase Locked Loop ?? PLL, applied in wind power inverters. The SRF-PLL, DDSRF-PLL, DSOGI-PLL and a MATLAB/Simulink PLL model are compared when there are harmonics in the point of common coupling (PCC). The simulations represent a wind farm with one synchronous generator of 1.5 MW using full converters. The results show that the harmonic produced...
The distribution power systems are often affected by the harmonics generated by single-phase electronic loads. This paper proposes an analytic model for estimating the single-phase harmonic currents of loads with bridge rectifiers based on diodes. Such a model requires low computational cost for being evaluated, and it allows investigating the harmonic of currents of loads fed by sinusoidal or non-sinusoidal...
Water tree degradation phenomenon constitutes a serious problem in XLPE insulated power cables. The presence of water trees lead to harmonic components in the insulation loss current, of which analysis provides a powerful indication of the state of the degradation. The first goal of this study is to establish a procedure to recover the measured loss current waveform in XLPE cables with water tree...
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