A control method and system for backup flywheel energy storage UPS

Abstract

The invention discloses a control method and system for a backup flywheel energy storage UPS. The method comprises when the grid mains is normal, enabling the grid mains to supply power to a power load and a flywheel UPS device; when the grid mains has a fault, starting the flywheel UPS device to supply power to the power load, determining whether the grid mains returns to normal, enabling the grid mains to supply power to the electric load and the flywheel UPS device if so, if not, still supplying power to the electric load with the flywheel UPS device and determining whether the supply timeof the flywheel UPS device is equal to the preset time; if not, stilling supplying power to the power load with the flywheel UPS device; if so, executing the next step; starting a diesel engine unitto supply power to the power load and the flywheel UPS device, and determining whether the grid mains returns to normal, supplying power to the power load and the flywheel UPS device with the grid mains if so, and supplying power to the power load and the flywheel UPS unit with the diesel engine unit if not. The method uses less equipment, has a low installation threshold, high efficiency, fast response, and high output voltage quality.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a control method and system for a backup flywheel energy storage UPS. Background technique [0002] Traditional UPS systems mostly use batteries as energy storage units, which have the advantage of high energy storage density, which enables them to provide power supply for loads for a long time, but its disadvantages are large footprint, high failure rate, and unfriendly environment, etc. In many ways, this limits the development of battery energy storage UPS. The flywheel energy storage UPS system stores electrical energy as mechanical energy, which has the advantages of high-efficiency storage, fast charging and discharging, and environmental friendliness. It is especially suitable for places with frequent power outages. [0003] The working mode of the flywheel energy storage UPS system is divided into three types: online double conversion type, online interactive type a...

AI Technical Summary

Problems solved by technology

In comparison, the backup UPS system uses the least equipment, and the power supply efficiency is high, which can reach more than 95%. However, due to the limitation of the control method and the equipment used, its response is slow. Load power supply, the quality of power supply is not as high as that of online UPS

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