Method and device for mains power supply

Abstract

Embodiments of the present invention relate to the technical field of power systems. An embodiment of the present invention provides a mains power supply method, including: when the mains power is cut off, detecting whether the remaining power of the mains backup system is not enough to support the normal working time T of the key load under the mains power supply system ; If so, detect whether the feedable amount of the electric vehicle under the mains power supply system is greater than zero; if the feedable amount of the electric vehicle under the city power supply system is greater than zero, then control one or more vehicles to provide The electric vehicle capable of feeding power and the mains backup system jointly supply power to the key load. Using the technical solution provided by the embodiments of the present invention can keep the key load working for as long as possible when the mains power is cut off to wait for the mains to return to normal, that is, to improve the stability of the key load. In addition, the embodiment of the present invention also provides a mains power supply device.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method and device for supplying electricity from a commercial power supply. Background technique [0002] With the increasingly serious energy crisis and the gradual enhancement of people's awareness of environmental protection, clean energy vehicles have been widely developed and popularized, among which the development technology of electric vehicles is the most mature. [0003] At present, electric vehicles are mainly charged through the power supply system of the mains. With the increase in the number of electric vehicles, the problem is: if the number of electric vehicles that need to be charged at the same time is too large, it will cause a serious burden on the city power. If the power demand of the load under the electric power supply system exceeds the maximum load of the mains, it will cause the interruption of the mains. In order to solve this proble...

AI Technical Summary

Problems solved by technology

With the increase in the number of electric vehicles, the problem is: if the number of electric vehicles that need to be charged at the same time is too large, it will cause a serious burden on the city power. The power demand of the load under the electric power supply system exceeds the maximum load of the mains, which will cause the mains to be interrupted

The disadvantage of this method is that when the mains power is cut off, if the energy stored in the energy storage device is insufficient, some key loads will be interrupted because they cannot receive timely power supply, which will cause great economic losses.

The so-called critical load refers to the load that needs to work uninterruptedly and cannot be powered off halfway or will cause huge losses if the power is cut off halfway, such as data centers, server rooms, etc. These loads need to work uninterrupted and cannot be powered off halfway. If there is no electricity, it will cause a large amount of data information to be lost because it cannot be saved in time, which will seriously affect people's daily work and life.

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