US 12,280,693 B2
Power management system, electric vehicle supply equipment, server, and adjustment method of power supply and demand balance
Tamaki Ozawa, Toyota (JP); Toru Nakamura, Toyota (JP); Akinori Morishima, Naka-gun (JP); Yusuke Horii, Nagoya (JP); and Wataru Matsumura, Ichihara (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on May 23, 2022, as Appl. No. 17/664,444.
Claims priority of application No. 2021-125865 (JP), filed on Jul. 30, 2021.
Prior Publication US 2023/0035591 A1, Feb. 2, 2023
Int. Cl. B60L 55/00 (2019.01); B60L 53/62 (2019.01); B60L 53/65 (2019.01); B60L 53/68 (2019.01)
CPC B60L 55/00 (2019.02) [B60L 53/62 (2019.02); B60L 53/65 (2019.02); B60L 53/68 (2019.02); B60L 2240/72 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A power management system comprising:
a power system;
a microgrid configured to exchange power with the power system, wherein the microgrid includes a plurality of power adjustment resources connected to each other, wherein the plurality of power adjustment resources includes electric vehicle supply equipment;
a first server belonging to an aggregator and configured to communicate with the plurality of power adjustment resources; and
a second server belonging to a business operator of the power system and configured to communicate with the first server, wherein the second server is further configured to communicate with the electric vehicle supply equipment without intervention of the first server, wherein
the electric vehicle supply equipment includes a processor configured to:
determine whether a vehicle is electrically connected to the electric vehicle supply equipment, wherein
the processor transmits a first signal to the first server in response to a determination that the vehicle is electrically connected to the electric vehicle supply equipment, wherein the first signal gives the first server authority to control operation of the electric vehicle supply equipment, and
the processor transmits a second signal to the second server in response to a determination that the vehicle is not electrically connected to the electric vehicle supply equipment, wherein the second signal gives the second server authority to control operation of the electric vehicle supply equipment;
determine whether the electric vehicle supply equipment has received a first power adjustment request from the first server, wherein
the processor causes the electric vehicle supply equipment to start charging and discharging a battery of the vehicle to suppress voltage fluctuation in the microgrid in response to a determination that the electric vehicle supply equipment has received the first power adjustment request; and
determine whether the electric vehicle supply equipment has received a second power adjustment request from the second server, wherein
the processor causes the electric vehicle supply equipment to output reactive power to the microgrid so as to maintain a voltage of the microgrid at a constant voltage value to suppress voltage fluctuation in the power system in response to a determination that the electric vehicle supply equipment has received the second power adjustment request.