Zero-interruption hybrid dual power supply automatic conversion device and use method thereof

Abstract

The invention discloses a zero-interruption hybrid dual power supply automatic conversion device and a use method thereof. The device comprises a conversion device body. An excitation conversion switch and a main control controller are arranged in the conversion device body. The main control controller is provided with an ADC sampling module and an IGBT drive output module. The input end of the excitation conversion switch is connected with a main power supply circuit L1 and a backup power supply circuit L2. The input end of the excitation conversion switch is connected with a load circuit through a bus. An inverter grid-connected power supply unit is arranged next to the excitation conversion switch. The input and output ends of the inverter grid-connected power supply unit are connectedwith the main power supply circuit L1 and the load circuit respectively. The control end of the excitation conversion switch is connected with the signal output end of the main control controller. Thedevice provided by the invention overcomes a traditional conversion switch's problem that the load has a short power failure when a circuit is switched, and has the advantages of lower static loss, higher withstand voltage level and insulation level, and better power supply continuity and stability.

Description

technical field [0001] The invention relates to the field of a power conversion switch, in particular to a zero-interruption hybrid dual-power automatic conversion device and a method for using the same. Background technique [0002] With the further development of economy and technology, the requirements of power users for the continuity and reliability of the power supply system are also increasing. For the power supply of sensitive loads, such as medical power supply, military power supply, fire power supply, data center, and large event venue power supply etc. If there is a power interruption, it will cause very serious consequences. In general, sensitive loads need to be powered by two independent power sources so that the continuity of their power supply can be guaranteed. [0003] At present, a large number of mechanical automatic transfer switching devices are used in AC transmission as a switching device for two-way power supply, although its advantages are obvious...

AI Technical Summary

Problems solved by technology

However, its disadvantages are described as follows: a. Since the electronic switches connected in parallel between the main and standby power supplies are semiconductor devices, the insulation and withstand voltage levels of the main and standby power supplies are greatly reduced, and there are certain risks

b. During the conversion process, there may be a risk that the two power supplies are simultaneously turned on to the load through the electronic switch. If the phase difference between the main and standby power supplies is large, or the potential difference is large, there may be a short circuit problem between the main and standby power supplies, resulting in damage to the electronic switch. , affecting the reliability of the power supply

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