Three-in and three-out parallel online UPS (uninterrupted power supply)

Abstract

The invention relates to a three-in and three-out parallel online UPS (uninterrupted power supply), which comprises a three-phase interactive master control module, a three-phase voltage stabilizing and data collecting module and an IGBT (insulated gate bipolar transistor) module, wherein the three-phase interactive master control module processes data in real time, the three-phase voltage stabilizing and data collecting module collects three-phase voltage signals for the three-phase interactive control module, the IGBT module is used for forming an inverter circuit and a charging circuit, and a control signal output end of the three-phase interactive master control module is connected with a control signal input end of the IGBT module. The three-in and three-out parallel online UPS utilizes three ring transformers, carries out wiring according to a three-phase four-wire star connection method, and carries out real-time communication by using four super single chip microcomputers so as to conduct data processing. The size including the weight of the entire UPS provided by the invention 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 the four 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

[0001] technical field [0002] The invention relates to a three-phase large-scale UPS, in particular to a three-input and three-outlet parallel online UPS. Background technique [0003] At present (10k-800k) UPS (uninterruptible power system) field, there are only two types of three-input three-outlet three-phase UPS, 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 ...

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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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