US 11,726,538 B2
Method and a device for power supply switchover in a power system
Zhen Cao, Nanjing (CN); Feng Xian Cui, Nanjing (CN); Ya Li Wang, Nanjing (CN); Di Jun Gao, Nanjing (CN); and Lei Ming Qin, Nan Jing (CN)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Filed by Siemens Aktiengesellschaft, Munich (DE)
Filed on Jul. 21, 2021, as Appl. No. 17/381,380.
Claims priority of application No. 202010714973.7 (CN), filed on Jul. 23, 2020.
Prior Publication US 2022/0026971 A1, Jan. 27, 2022
Int. Cl. G06F 1/30 (2006.01); G06F 1/3206 (2019.01)
CPC G06F 1/30 (2013.01) [G06F 1/3206 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for power supply switchover in a power system including two power supplies, each power supply of the two power supplies being connected to a bus through an incoming line, a power supply of the two power supplies currently in operation usable as a main power supply and another power supply of the two power supplies being usable as a backup power supply, both the incoming line and the bus including three phases, and respective lines being connected by respective phases, the method comprising:
determining whether there is at least one sound phase among the three phases in response to identifying a fault in the power system; and
obtaining, before disconnection of the main power supply and in response to determining at least one sound phase among the three phases, power data on the at least one sound phase, the power data being usable to determine whether the backup power supply meets a condition for connecting in a quick mode after disconnection of the main power supply.