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Hybrid microgrid system and power control method based on power electronic transformer

A technology of power electronics and power control, applied in the direction of reducing/preventing power oscillation, AC network with the same frequency from different sources, electrical components, etc., to achieve the effect of bus voltage stabilization

Active Publication Date: 2017-05-17
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides an AC / DC hybrid microgrid system and a power control method based on a power electronic transformer, which realizes the energy coordinated control among the main grid, the AC microgrid, and the DC microgrid, and ensures that the AC The frequency stability of the micro-grid and the bus voltage of the DC micro-grid are stable to solve the problem of stable operation of the AC-DC hybrid micro-grid after distributed energy access

Method used

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  • Hybrid microgrid system and power control method based on power electronic transformer
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  • Hybrid microgrid system and power control method based on power electronic transformer

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Embodiment Construction

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0057] figure 1 A schematic structural diagram of an AC / DC hybrid microgrid system based on a power electronic transformer provided by Embodiment 1 of the present invention is shown. see figure 1 , Embodiment 1 of the present invention provides an AC / DC hybrid microgrid system based on a power electronic transformer, including: a main grid 10, a...

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Abstract

The invention provides an AC and DC mixed micro-grid system based on a power electronic transformer and a power control method of the system. The system comprises a main grid, an AC micro grid, a DC micro grid and the power electronic transformer. According to the operation states and power requirements of the AC micro grid and the DC micro grid, the power electronic transformer adjusts the power of the AC micro grid and the DC micro grid in a mixed sagging method. Thus, the power of the main grid, the AC micro grid and the DC micro grid can be rapidly and accurately adjusted, it is ensured that the frequency of the AC micro grid and the bus voltage of the DC micro grid are stable, and stable operation of the AC and DC mixed micro-grid after access of distributed energy is realized.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to an AC-DC hybrid microgrid system and a power control method based on a power electronic transformer. Background technique [0002] The network access requirements of distributed energy resources (DER) promote the continuous development of power systems, and microgrids are an effective solution to realize large-scale intermittent DER access. DER is connected in the form of DC, which can save a lot of commutation links, and does not require phase and frequency tracking, and the controllability and reliability will be greatly improved. DC is an ideal access form for DER. In recent years, DC microgrids have gradually gained people's attention. However, at this stage, the main body of the power grid is still in the form of AC, and AC access is still the main form of DER grid connection. The hybrid microgrid with AC and DC coexistence will be the microgrid structure that will exist fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J5/00H02J3/38H02J3/04H02J1/14H02J3/24
Inventor 涂春鸣兰征帅智康肖凡姜飞杨韬刘维
Owner HUNAN UNIV
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