Control method of power supply system

Abstract

The invention relates to the field of power supply and provides a control method of a power supply system. The method comprises the following steps that if a detection result of an alternating currentpower failure detection unit is mains supply power failure and a detection result of the alternating current power failure detection unit is still mains supply power failure after delaying for a first time, that the mains supply power failure occurs is confirmed; after that the mains supply is powered down is confirmed, if the indication result of the mains supply power down flag bit is that themains supply is normal, a switching device is controlled to be switched on, a fuel cell is controlled to be switched on, the indication result of the mains supply power down flag bit is adjusted to bemains supply power down, and the storage battery supplies power to the load; and if the indication result of the mains supply power failure flag bit is mains supply power failure and that the fuel cell is started completely is obtained, the fuel cell supplies power. The method is advantaged in that the situation that the fuel cell and the storage battery are started and stopped by mistake can beavoided, and the service life of the storage battery and the fuel cell can be prolonged; the starting instruction cannot be frequently and repeatedly issued to the fuel cell so that the control program execution disorder is avoided.

Description

technical field [0001] The invention relates to the field of power supply, in particular to a control method for a power supply system. Background technique [0002] Some existing power consumption occasions require continuous power supply, such as communication base stations. [0003] In order to ensure the power demand of this kind of power consumption occasions, the Chinese invention patent application with the publication number CN101505092SA discloses a fuel cell backup power supply system for communication. The fuel cell is used as a backup power supply to power the communication system after the mains power failure. [0004] Moreover, due to the long start-up time of the fuel cell, it is easy to cause the fuel cell to fail to supply power to the load in time after the mains power failure. In order to solve this problem, the Chinese utility model patent with publication number CN202798118U discloses a fuel cell emergency The seamless switching system of the power sup...

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Problems solved by technology

[0004] Moreover, due to the long start-up time of the fuel cell, it is easy to cause the fuel cell to fail to supply power to the load in time after the mains power failure. In order to solve this problem, the Chinese utility model patent with publication number CN202798118U discloses a fuel cell emergency The seamless switching system of the power supply, the scheme first adopts the battery power supply after the mains power failure, and switches to the fuel cell power supply after the fuel cell is turned on

[0005] However, the detection accuracy of the existing technology for mains power failure is relatively poor, which leads to false start and stop of the fuel cell, which affects the service life of the fuel cell and battery; Duplicate the opening command of the fuel cell before it is fully opened, causing the control program to be disordered

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