Undisturbed uninterruptible power supply device

Abstract

The invention discloses an undisturbed uninterruptible power supply device, which comprises power access terminals, a rectifier, an inverter, an intelligent charger, an energy storage device, a direct supply switch and an undisturbed switching device, wherein a first path of the power access terminals is connected with a group of switching units in the undisturbed switching device through the direct supply switch, a second path of the power access terminals is connected with another group of switching units in the undisturbed switching device through the rectifier and the inverter, and a third path of the power access terminals is connected with the intelligent charger; the intelligent charger charges and stores energy for the energy storage device at a low load period of the power grid; the energy storage device outputs direct current electric energy to the inverter when the input voltage of the inverter is reduced; and the undisturbed switching device is switched in an undisturbed mode between two groups of switching units and outputs an alternating current power supply to a power output terminal. The power supply device can realize high-quality high-precision uninterruptible power supply, the electricity load is not disturbed in the power supply process so as not to cause shutdown, and the uninterruptible power supply of the load is realized.

Description

Technical field [0001] The invention belongs to the technical field of power systems, and specifically relates to an uninterruptible power supply system capable of realizing undisturbed switching. Background technique [0002] With the continuous development and progress of society, there are more and more large-scale international conferences and competitions. Ensuring reliable and safe power supply for conferences and events is not only an important power supply event, but also has a significant impact on national politics. Therefore, how to provide reliable and safe power supply to large venues has been mentioned on a very important agenda. [0003] However, today's large venues and large spaces often use metal halide lamps. An instantaneous power failure will cause the metal halide lamps to be extinguished immediately, and the metal halide lamps cannot be lit immediately when the power is turned on again. It takes about 10 minutes to warm up. Will gradually reach normal bright...

AI Technical Summary

Problems solved by technology

[0003] However, today's large venues and large spaces often use metal halide lamps for lighting. An instant power failure will cause the metal halide lamps to go out immediately, and the metal halide lamps cannot be lit immediately when the power is called again, and it takes about 10 minutes to warm up. will gradually reach normal brightness

Therefore, once such accidents occur in large-scale international conferences or large-scale competitions, it will have extremely bad effects

[0004] At the same time, today's large venues are still using LED screens to display various information images. This kind of LED screen has high power and strong capacitive load. When the screen is powered on, it will have a great impact on the power grid and threaten the power supply. Safety

In addition, during the use of large-scale venues, it is often necessary to temporarily add many TV OB vans. The high-frequency electromagnetic waves emitted by TV OB vans will bring a lot of harmonic interference to the power grid of large venues, and also affect the power grid. Power supply security

[0005] In addition to the above impacts, the power grid that supplies power to large venues will also be affected by accidents such as external extreme weather, line damage, and external force damage caused by municipal construction, resulting in a sudden drop in power supply voltage (an interruption within about 100 milliseconds occurs Electricity) or power interruption and other problems will lead to serious consequences such as power failure and downtime of sensitive electrical equipment (such as metal halide lamps, LED screens, TV broadcast vehicles, computer servers, etc.) in large venues, which will cause major economic losses. Even serious personal injury or death, resulting in irreparable negative effects

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