US 12,272,983 B2
Power system, monitoring device, inverter device and program
Takashi Kitamura, Osaka (JP); and Akihiro Ohori, Osaka (JP)
Assigned to DAIHEN Corporation, Osaka (JP)
Filed by DAIHEN Corporation, Osaka (JP)
Filed on Mar. 14, 2022, as Appl. No. 17/694,374.
Claims priority of application No. 2021-041118 (JP), filed on Mar. 15, 2021; and application No. 2021-133891 (JP), filed on Aug. 19, 2021.
Prior Publication US 2022/0294250 A1, Sep. 15, 2022
Int. Cl. H02J 7/00 (2006.01); H02M 1/00 (2006.01); H02M 1/42 (2007.01); H02M 7/537 (2006.01)
CPC H02J 7/00712 (2020.01) [H02J 7/0013 (2013.01); H02M 1/0012 (2021.05); H02M 1/0067 (2021.05); H02M 1/42 (2013.01); H02M 7/537 (2013.01); H02J 2207/20 (2020.01)] 6 Claims
OG exemplary drawing
 
1. A monitoring device comprising:
a receiving unit configured to receive an effective power output value and a reactive power output value from each of a plurality of inverter devices;
a setting unit configured to set an effective power target value and a reactive power output value for each of the plurality of inverter devices;
a first calculation unit configured to calculate, upon input of the effective power target value and the effective power output value, a voltage phase command value for each of the plurality of inverter devices;
a second calculation unit configured to calculate, upon input of the reactive power target value and the reactive power output value, a voltage amplitude command value for each of the plurality of inverter devices;
a transmitting unit configured to transmit the voltage phase command value and the voltage amplitude command value to a corresponding inverter device;
a distribution rate calculating unit configured to calculate a distribution rate for each of the plurality of inverter devices; and
a total value calculating unit configured to calculate an effective power total value as a sum of the effective power output values of the respective inverter devices and a reactive power total value as a sum of the reactive power output values of the respective inverter devices,
wherein the setting unit is configured to calculate the effective power target value for each of plurality of the inverter devices, using the effective power total value and a distribution rate for said each of the plurality of inverter devices, and calculate the reactive power target value for each of the plurality of inverter devices, using the reactive power total value and a distribution rate for said each of the plurality of inverter devices.