UPS (Uninterrupted Power System)

Abstract

The invention discloses a UPS (Uninterrupted Power System), and the system comprises an air circuit breaker Q1, an air circuit breaker Q2, a maintenance bypass air switch Q3BP, a bypass static switch, a rectification module REC, an inversion module INV, an output isolation transformer TR2, a main circuit static switch, an air circuit breaker Q5, a contact-type normally-opened contact KM, and a storage battery. A main input circuit AC power supply is inputted from the air circuit breaker Q1, and the AC power supply is converted into a DC power supply through the rectification module REC, thereby completing the AC / DC conversion, so as to charge the storage battery in parallel connection with a main input circuit and to provide a reliable input direct current for the inversion module INV. The inversion module INV carries out the DC / AC conversion, and converts the DC power supply provided by the rectification module REC and the storage battery into the AC power supply. The AC power supply is outputted through the output isolation transformer TR2. A bypass input power supply is inputted from the air circuit breaker Q2, and is controlled by the bypass static switch and then is outputted. The UPS is stable in voltage, is quick and efficient, is simple in operation, and is convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to an uninterruptible power supply system. Background technique [0002] At present, due to the quality problems of the power grid itself and the effects of various accidental factors, coupled with the destruction of natural disasters, voltage surges, electromagnetic noise, continuous high voltage, continuous low voltage and other bad grid phenomena are common in developed countries, and even Extended power outages may occur. [0003] The uninterruptible power supply system is connected between the input power supply and the load, and provides power supply equipment for important loads without interference from the grid, stable voltage, and stable frequency power supply. Provide sufficient backup time for important loads such as communication, energy, chemical industry, and medical treatment. When the main road input fails, the switching device is transferre...

AI Technical Summary

Problems solved by technology

When the main road input fails, the switching device is transferred to the battery input terminal, and the battery outputs the electric energy stored by itself to the DC bus through DC / DC conversion to ensure the stability of the DC bus voltage. At the same time, the DC bus supplies power to the load through DC / AC conversion, ensuring Normal output. At present, when the uninterruptible power supply repeatedly supplies power to the load, the battery is prone to reverse failure, and the power supply voltage is unstable.

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