Microgrid system

A micro-grid and subsystem technology, applied in the field of micro-grid systems, can solve problems such as the inability to guarantee the continuous power supply capacity of the distribution network

Pending Publication Date: 2018-07-24
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention proposes a micro-grid system to solve the

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Embodiment Construction

[0022] 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.

[0023] 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.

[0024] 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 provides a microgrid system. The microgrid system comprises: a plurality of microgrid subsystems; each microgrid subsystem comprises a direct current microgrid and at least two flexible substations; each flexible substation comprises: a high voltage alternating current system, a high voltage direct current system, and a low voltage direct current system, wherein thehigh voltage alternating current system and the high voltage direct current system are connected, the high voltage direct current system and the low voltage direct current system are connected, and the high voltage alternating current system and the low voltage direct current system are connected; each direct current microgrid includes: a high voltage direct current bus and a low voltage direct current bus; the plurality of microgrid subsystems are interconnected into a loop by the high voltage direct current buses; the high voltage direct current buses are connected to the high voltage direct current systems; and the low voltage direct current systems of the flexible substations in the microgrid subsystems are connected through the low voltage direct buses. Load transfer and looped network current equalization can be ensured, and the continuous power supply capability of the distribution network is ensured.

Description

technical field [0001] The invention relates to the technical field of flexible power distribution, in particular to a microgrid 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 is facing huge c...

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Application Information

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IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/06H02J3/0073
Inventor 邓占锋赵国亮杨士慧刘海军蔡林海陆振纲徐向前于弘洋宋洁莹刘宗烨尉志勇葛菁张永征
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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