Power supply system and power supply system starting method

Abstract

The invention provides a power supply system and a power supply system starting method, and belongs to the technical field of power supply. The power supply system provided by the embodiments of the present invention comprises a three-port power electronic transformer, a first renewable energy system, a first energy storage system, a second renewable energy system and a second energy storage system; the input end of the three-port power electronic transformer is connected with the high-voltage power grid; the first renewable energy system and the first energy storage system are both connectedwith the alternating current output port of the three-port power electronic transformer; the second renewable energy system and the second energy storage system are both connected with the direct current output port of the three-port power electronic transformer, and the AC / DC distribution, the renewable energy system and the energy storage system are integrated into a power supply system to provide power distribution for the user, so that the economical efficiency, the reliability and the flexibility of user electricity utilization are realized.

Description

technical field [0001] The present invention relates to the technical field of power supply, in particular to a power supply system and a method for starting the power supply system. Background technique [0002] Electricity is the source of power for the development of the national economy and provides a reliable power guarantee for economic and social development. Therefore, the safety and reliability of the power system operation is the top priority for the rapid development of the national economy. [0003] At present, in the traditional AC distribution network, the problems of high AC-DC energy conversion loss, poor power distribution flexibility, and low matching of power distribution links have become increasingly prominent. In some places with limited locations, it is difficult to install AC transformers. With the rapid development of the national economy, the application fields of DC power supply equipment are becoming wider and wider, and the demand for AC-DC hybr...

AI Technical Summary

Problems solved by technology

[0003] At present, in the traditional AC distribution network, the problems of high AC-DC energy conversion loss, poor power distribution flexibility, and low matching of power distribution links have become increasingly prominent. In some places with limited locations, it is difficult to install AC transformers.

With the rapid development of the national economy, the application fields of DC power supply equipment are becoming wider and wider, and the demand for AC-DC hybrid power supply is increasing. At present, the AC transformer with a single energy conversion cannot adapt to new energy consumption scenarios.

In recent years, AC-DC hybrid power electronic transformers have been developed rapidly. However, the current domestic power electronic transformers are dual-port power transformers, which can only provide single DC power supply or AC power supply, and cannot achieve AC-DC hybrid power supply. And at present, there are few studies on the integration of AC and DC power distribution, new energy, and energy storage technology into one system, so it cannot provide users with the economy, reliability and flexibility of power distribution and consumption.

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