Patent ID: 11916397
Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 5:
6. A control method for a combined electric power generations' supply system that includes:
an AC power generator configured to supply electric power by off grid independent operation,
a DC power supply device, and
an inverter connected to the same bus as the AC power generator and configured to convert DC power output by the DC power supply device into AC power,
the method comprising:
a step of calculating a value relating to a rotation of a rotor of the virtual power generator when the virtual power generator is driven according to an active power command based on a rotor model that simulates driving of the virtual power generator and calculates a value relating to the rotation of the rotor of the virtual power generator and the active power command;
a step of calculating a value relating to a field voltage of the virtual power generator by inputting the bus voltage and a reactive power command for the inverter to an Automatic Voltage Regulator (AVR) model that determines a value relating to the field voltage of the virtual power generator based on the bus voltage and the reactive power command;
a step of determining a value relating to a voltage frequency, a value relating to an active power, and a value relating to a reactive power to be output to the inverter based on the calculated value relating to the rotation and the value relating to the field voltage; and
a step of performing control of a pulse width modulation of the inverter based on the determined voltage frequency, active power, and reactive power,
wherein a time constant relating to synchronization power of the rotor model matches a time constant relating to synchronization power with the AC power generator, and
wherein a droop gain of the AVR model is different from a droop gain of the AC power generator.