Single-in and single-out parallel online UPS (uninterrupted power supply)

Abstract

The invention relates to a single-in and single-out parallel online UPS (uninterrupted power supply), which comprises a single-phase interactive master control module, a single-phase voltage stabilizing and data collecting module, a switching power supply module and an IGBT (insulated gate bipolar transistor) module, wherein the single-phase interactive master control module processes data in real time, the single-phase voltage stabilizing and data collecting module collects single-phase voltage signals for the single-phase interactive master control module, the switching power supply module is used for providing power for the entire system, the IGBT module is used for forming an inverter circuit and a charging circuit, and a control signal output end of the single-phase interactive master control module is connected with a control signal input end of the IGBT module. The size including the weight of the entire single-in and single-out parallel online UPS is one third of that of a traditional power frequency UPS, thereby being lighter, energy saving, environmental friendly, stable, and strong in load carrying capacity; data is processed in real time through mutual communication of two super single chip microcomputers; a battery mode is switched within 1.5 millisecond when the mains supply is abnormal, thereby ensuring power supply for loads to be uninterrupted.

Description

technical field [0001] The invention relates to a single-phase large-scale UPS, in particular to a single-input and single-output parallel online UPS. Background technique [0002] Currently (10k-100k) UPS (uninterruptible power system) field has only two models, one is the traditional power frequency online type, and the other is the high frequency online type. But at present, these two models have the disadvantages of high energy consumption, low efficiency, and poor stability, and cannot really meet the needs of users. The traditional power frequency on-line UPS has a huge volume, the traditional power frequency transformer is heavy, the loss is large, and the heat is severe, so a lot of iron, aluminum and copper are used. The high-frequency on-line UPS has a small installed capacity and has inductive and capacitive loads. The ability is poor, and the repair rate is as high as 10%-20%. Regardless of the mains mode or the battery mode, the power frequency on-line UPS and ...

AI Technical Summary

Problems solved by technology

But at present, these two models have the disadvantages of high energy consumption, low efficiency and poor stability, which cannot really meet the needs of users.

The traditional power frequency on-line UPS has a huge volume, the traditional power frequency transformer is heavy, the loss is large, and the heat is severe, so a lot of iron, aluminum and copper are used. The high-frequency on-line UPS has a small installed capacity and has inductive and capacitive loads. The ability is poor, and the repair rate is as high as 10%-20%. Regardless of the mains mode or the battery mode, the power frequency on-line UPS and the high-frequency on-line UPS are in the inverter state as long as they work. The greater the load, the greater the loss, and the power unit The shorter the life of the device, it is difficult to meet the increasing demand of users for power consumption

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