CONTROL METHOD AND CONTROL DEVICE A PLURALITY OF INVERTERS CONNECTED IN PARALLEL

摘要

The present application discloses a control method and a control device for parallel inverters (1 ... N). The method comprises: receiving a feedback signal Vmg reflecting load voltage and a voltage reference signal Vref (S701) to generate a command signal P set reflecting active power and a command signal Q set reflecting reactive power (S702); taking the command signal P set reflecting active power as the first offset of an active power-output voltage frequency curve (P-F) of an inverter unit, and taking the command signal Q set reflecting reactive power as the second offset of an reactive power-output voltage amplitude curve (Q-V) of the inverter unit (S703); transversely translating the curve(P-F) of the inverter unit according to the first offset, transversely translating the curve( Q-V) of the inverter unit according to the second offset, and adjusting the load voltage of the inverter system by means of adjusted output voltage frequency and output voltage amplitude of the inverter unit (S704).