AC-DC hybrid microgrid system

An AC-DC hybrid, DC micro-grid technology, applied in AC network circuits, AC networks with the same frequency from different sources, electrical components, etc., can solve the problem that the continuous power supply capacity of the distribution network cannot be guaranteed.

Active Publication Date: 2018-08-17
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention proposes an AC / DC hybrid microgrid system to solve the problem that the existing technology cannot guarantee the continuous power supply capability of the distribution network

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Embodiment Construction

[0021] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "first", "second", "third" and so on are only used for descriptive purposes, and should not be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; It ...

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Abstract

The embodiment of the invention proposes an AC-DC hybrid microgrid system. The AC-DC hybrid microgrid system comprises a DC microgrid and at least two flexible substations, wherein each flexible substation comprises a high-voltage AC system, a high-voltage DC system and a low-voltage DC system, the high-voltage AC system and the high-voltage DC system are connected, the high-voltage DC system andthe low-voltage DC system are connected, the high-voltage AC system and the low-voltage DC system are connected, the DC microgrid comprises a high-voltage DC bus and a low-voltage DC bus, the high-voltage DC system of each flexible substation is connected via a high-voltage DC bus, and the low-voltage DC system of each flexible substation is connected via a low-voltage DC bus. By the AC-DC hybridmicrogrid system, load transferring and looped network power flow balancing are achieved, and the durable power supply capability of a power transmission network is ensured.

Description

technical field [0001] The invention relates to the technical field of flexible power distribution, in particular to an AC / DC hybrid micro-grid system. Background technique [0002] The distribution network is at the end of the power system, directly facing the power users, and undertakes the important task of distributing electric energy and serving customers. [0003] At present, the construction of the distribution network is relatively lagging behind and the means of regulation and control are limited, which restricts the flexibility of the operation control of the distribution network and causes problems such as unbalanced feeder load and long power supply recovery time; The increase in the proportion of permanent loads and the continuous improvement of the penetration rate of new energy sources have put forward higher requirements for the means of guaranteeing the power quality of the distribution network and the reliability of power supply. The distribution network i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/06H02J3/0073
Inventor 杨士慧刘海军徐向前邓占锋赵国亮蔡林海陆振纲于弘洋葛菁宋洁莹周哲尉志勇张永征刘宗烨刘辉吴林林赵贺李子衿
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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