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This paper proposes a selective voltage harmonic compensation strategy for stand-alone inverters. The use of LC output filters makes it possible to reduce switching harmonics at the output terminals of the inverter; however, it also produces voltage distortion when feeding nonlinear loads due to the harmonic voltage drop across the filter inductances. To compensate the voltage harmonic distortion...
Phase-locked loops (PLLs) are commonly used for the synchronization of grid connected power converters. However, the standard PLL structures are not able to reject grid disturbances such as voltage harmonics, unbalances or DC components in the measured voltage. Since the response of the power converters depends on the grid phase tracking, it is necessary to ensure an accurate synchronization even...
With the increasing penetration of photovoltaic systems, conventional plants, which are based on synchronous machines, will be displaced. Inverter based photovoltaic systems behavior is quite different from traditional generators in both electrical and mechanical dynamics, and grid stability can be negatively affected. A solution towards stability improvement is the use of virtual synchronous generator...
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