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Grid faults constitute the main challenge for distributed generation, especially permanent magnet synchronous generator (PMSG)-based wind turbines connected to the grid via back-to-back (BTB) converters. On the other hand, grid codes enforced wind turbines to aid network and accomplish low-voltage ride-through (LVRT) requirements during grid faults. DC-link overvoltage suppression without external...
Nowadays many of the distributed generation (DG) sources such as photovoltaic systems are connected to the grid via inverters. One of the main problems of the inverters is the injection of current harmonics to the grid. For attenuating the injected current harmonics, low pass filters such as LCL filter are used in the output of the inverters. The quality of the injected current to the grid has a significant...
In this paper, a new approach for modulation of an 11-level cascaded multilevel inverter using selective harmonic elimination (SHE) is presented. The dc sources feeding the inverter are considered to be varying in time. In this approach the switching angles are obtained offline for different dc source values. Then an artificial neural network (ANN) is trained to determine the switching angles that...
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