US 12,237,681 B2
Microgrid startup method and startup program
Yoko Sakauchi, Tokyo (JP); Yukina Akiyama, Kanagawa (JP); Yuki Kudo, Tokyo (JP); Shunsuke Kawachi, Tokyo (JP); and Koji Toba, Tokyo (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Energy Systems & Solutions Corporation, Kawasaki (JP)
Appl. No. 18/263,110
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Feb. 19, 2021, PCT No. PCT/JP2021/006427
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/176167, PCT Pub. Date Aug. 25, 2022.
Prior Publication US 2024/0128754 A1, Apr. 18, 2024
Int. Cl. H02J 3/24 (2006.01); H02J 3/32 (2006.01); H02J 3/46 (2006.01); H02M 7/48 (2007.01)
CPC H02J 3/241 (2020.01) [H02J 3/32 (2013.01); H02J 3/46 (2013.01); H02M 7/48 (2013.01); H02J 2300/24 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A startup method of microgrid configured by a plurality of inverter power supplies independently sharing a load and divided into a master that starts up first and a slave that starts up secondly and later, the startup method comprising:
a master initial startup step of initially starting up the master in a CVCF mode;
a slave initial startup step of initially starting up the slave in a grid interconnection mode; and
a control mode changing step of the master and the slave changing control modes thereof when output fluctuation of the master and the slave becomes a predetermined threshold or less or when the master and the slave or other inverter power supplies become a predetermined operation state while output voltage of said master and said slave becomes a predetermined threshold or less.