Island miniature power supply system comprising three direct-current buses

Abstract

The invention discloses an island miniature power supply system comprising three direct-current buses. The system comprises a three-port power electronic transformer, a direct-current bus A, a direct-current bus B and a direct-current bus C. The three-port power electronic transformer comprises a direct-current port a, a direct-current port b and a direct-current port C; the direct-current port Aof the three-port power electronic transformer is connected with the direct-current bus A, the direct-current port B of the three-port power electronic transformer is connected with a direct-current bus B, and a direct-current port C of the three-port power electronic transformer is connected with a direct-current bus C; and the direct current bus A, the direct current bus B and the direct currentbus C are connected with a plurality of source load devices. According to the invention, problems of difficult renewable energy access to a power grid and difficult energy storage technology integration in an island are solved, the problems of mutual energy conversion, transmission and sharing between buses are effectively solved by using the three-port direct-current power electronic transformer, an island power grid is strengthened, and the power supply reliability of the power supply system is also improved.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to an island miniature power supply system with three direct current buses. Background technique [0002] With the rapid development of the national economy, the demand for social electricity consumption is on the rise, and electricity provides a source of power for economic and social development. With the continuous emergence of distributed renewable energy, a large number of households, factories, and vacant land have installed photovoltaic power generation or wind power generation, which has the characteristics of wide distribution area and small power per unit area. The problems of many times of AC and DC energy conversion in the network, high loss, poor flexibility of power distribution and low matching of power distribution and consumption links are becoming more and more prominent. It is difficult to connect the isolated island site to the external large grid power sys...

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Problems solved by technology

[0005] For this reason, the present invention provides an island micro-power supply system containing three DC buses to solve the problems in the prior art that the distributed energy access in the island is difficult, the grid structure is fragile, the power energy is unbalanced, and the problems of different power consumption Questions about customers' needs for different power voltage levels

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