A line commutated inverters are tied to a power grid or line.
The commutation of power is controlled by the power line so that, if there is a failure in the power grid, the photovoltaic system cannot feed power into line.
Line commutated inverters are thyristors. They use the mains AC voltage to turn off the conducting thyristors.
This type of inverter is basically an AC to DC converter operated in the inversion mode (Alpha>90°).
A self-commutated inverter has two alternately conducting main branches which, in series with each other, are connected to a d.c. voltage source. The point of connection of the main branches constitutes the phase terminal of the inverter and a turn-off circuit is connected to this connection point. Each main branch includes a commutating inductor at least one of which is provided with an auxiliary winding. The auxiliary winding is connected in series with diodes means and this series connection is connected to the d.c. voltage source for feedback of surplus energy in a commutating circuit and symmetrization of commutating capacitor voltage
The commutation of power is controlled by the power line so that, if there is a failure in the power grid, the photovoltaic system cannot feed power into line.
Line commutated inverters are thyristors. They use the mains AC voltage to turn off the conducting thyristors.
This type of inverter is basically an AC to DC converter operated in the inversion mode (Alpha>90°).
A self-commutated inverter has two alternately conducting main branches which, in series with each other, are connected to a d.c. voltage source. The point of connection of the main branches constitutes the phase terminal of the inverter and a turn-off circuit is connected to this connection point. Each main branch includes a commutating inductor at least one of which is provided with an auxiliary winding. The auxiliary winding is connected in series with diodes means and this series connection is connected to the d.c. voltage source for feedback of surplus energy in a commutating circuit and symmetrization of commutating capacitor voltage
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