Power distribution and supply system based on five-port power electronic transformer

Abstract

The invention discloses a power distribution and supply system based on a five-port power electronic transformer. The system comprises a large power grid, a first circuit breaker, the five-port powerelectronic transformer and a plurality of second circuit breakers, wherein ports in the five-port power electronic transformer comprise a direct-current port and an alternating-current port, and at least two of the ports are alternating-current ports; the large power grid is electrically connected with one of the alternating current ports through a first alternating current bus, and a first circuit breaker is further connected between the large power grid and the alternating current port in series; and the remaining AC ports and DC ports are respectively connected with at least one source loaddevice through a second circuit breaker. The technical problems of high intermediate conversion loss, poor power distribution and utilization flexibility and low power distribution and utilization link matching performance of conversion from alternating current to direct current in a traditional power distribution network in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of power distribution and power supply systems, in particular to a power distribution and power supply system based on a five-port power electronic transformer. Background technique [0002] With the rapid development of social power consumption and power consumption patterns, more and more equipment or products use DC power supply, and the demand for AC-DC hybrid power supply is growing rapidly. Coupled with the continuous emergence of distributed renewable energy, a large number of households, Photovoltaic power generation or wind power generation is installed in factories and vacant land, which has the characteristics of wide distribution area, small power per unit area, and coexistence of AC and DC. However, in the current traditional distribution network, the problems of high intermediate conversion loss from AC to DC, poor flexibility in power distribution and low matching of power distribution and con...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a power distribution and power supply system based on a five-port power electronic transformer, so as to solve the problem of high intermediate conversion loss, poor power distribution flexibility, and power distribution link in the traditional distribution network in the prior art. Technical issues with low compatibility

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