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Optymalne sterowanie falownika przy jego pracy na sieć systemu energetycznego

Mazur D.

Maszyny Elektryczne : zeszyty problemowe

2012

Nr 2(95)

25-30

The inverter circuit is supposed to operate for grid with low internal impedance (for fixed grid). The goal of the presented circuit is to provide the given current of the main harmonic to the grid. The grid can contain higher harmonics of the voltage, which due to the low impedance of the grid lines spreads to the voltage of the inverter output. Therefore we need to calculate the first (main) harmonic of this voltage and find such inverter controlling, that the main harmonic of the current flowing to the grid from the considered circuit would be in the given angle position to it and at the given value. The second important goal of the circuit is, as far as possible, to eliminate the voltage higher harmonics at the circuit output getting there from the grid. Obviously eliminating the ripples from voltage higher harmonics of the receiver is limited by the capabilities of the examined inverter circuit.