Method and a device for power supply switchover in a power system

A device 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 currently in operation of the two power supplies being usable 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 device comprising:

• an identification unit, to identify a fault in the power system, and, upon a fault being identified, to trigger a determining unit;
• the determining unit, to determine whether there is at least one sound phase among the three phases, and to trigger an obtaining unit, upon determining at least one sound phase among the three phases;
• and
• the obtaining unit, to obtain a power data on the at least one sound phase among the three phases before disconnection of the main power supply, 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.

A device 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 currently in operation of the two power supplies being usable 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 device comprising:

• at least one memory, used to store instructions;
• and
• at least one processor, to execute according to the instructions in the memory, for power supply switchover in a power system, at least:
• determining whether there is at least one sound phase among the three phases after identifying a fault in the power system;
• and
• obtaining power data on the sound phase, upon the determining indicating at least one sound phase among the three phases, before disconnection of the main power supply, 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.