POWER SUPPLY CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a power supply control method in which simultaneous power supply is performed by connecting in parallel storage batteries of a storage-battery driven vehicle during power outage of system power supply.SOLUTION: The power supply control method performs: a step of setting an auxiliary system power supply line 15 to be connected to a load 11, a forward/backward converter 16 and system power supply through first, second and third breakers 14, 17 and 19 respectively and separating the auxiliary system power supply line 15 by operating the first-third breakers 14, 17 and 19 during power outage; a step of operating the forward/backward converter 16 for a storage battery 12 by turning on one of the second breakers 17 to apply an alternate current a to the auxiliary system power supply line 15; a step of detecting the alternate current a of the auxiliary power supply line 15 to synchronize an alternate current b with the alternate current a of the auxiliary system power supply line 15 using the other forward/backward converters 16; a step of connecting the other forward/backward converters 16 to the auxiliary system power supply line 15 by turning on the second breakers 17; and a step of connecting the auxiliary system power supply line 15 to the load 11 by turning on the first breaker 14.