Method and system for parallel connection of UPS derated models with different capacitance grade

Abstract

The invention discloses a parallel connection method of different capacity level UPS derating machine, which is to solve the problem of incapability of equalizing the flow according to derating capacity caused by per-uniting the derating machine according to physical capacity. The method includes that: the physical output current is per-united according to the physical capacity of each stand-alone; each per-united physical output current is averaged to get the per-united equalized value of the physical output current of each stand-alone; the per-united physical output current value and the physical equalized current value are respectively converted to get the physical output current per-united value and physical equalized current per-united value of each stand-alone; the physical equalized current per-united value is revised according to the authorized capacity and the physical capacity of each stand-alone to get the authorized equalized current per-united value of each stand-alone; the physical output circuit of each stand-alone is controlled by taking advantage of the error between the physical output current per-united value and physical equalized current per-united value of each stand-alone. The invention discloses a different capacity level UPS derating machine parallel system at the same time.

Description

technical field

[0001] The invention relates to the technical field of power supplies, in particular to a method and system for parallel connection of UPS derating models of different capacity levels. Background technique

[0002] With the increasing degree of social informatization, the scale of information data is getting larger and larger, and the exchange is becoming more and more frequent. higher requirements.

[0003] UPS (Uninterrupted Power System, uninterrupted power supply system) as the main power supply equipment, its scalability and high redundancy reliability has become a research hotspot in the industry. UPS parallel technology not only allows small-capacity stand-alone modules to form a system capacity that meets user needs, but also forms a redundant power distribution mode to improve system reliability. Compared with the parallel technology of UPS modules of the same capacity level, the parallel connection technology of UPS modules of different capacity l...

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