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Consistency coordination control method for flexible interconnection direct-current microgrid group

A DC microgrid and coordinated control technology, which is applied in DC network circuit devices, control/regulation systems, DC power input conversion to DC power output, etc., can solve the problems of inability to realize flexible control of interconnected power and low cost of tie switches, etc. Achieve the effect of improving dynamic characteristics, high reliability, and reducing steady-state deviation

Active Publication Date: 2021-04-20
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

The tie switch has low cost and low loss, but it can only be used to connect sub-microgrids of the same voltage level, and cannot realize flexible control of interconnected power

Method used

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Embodiment Construction

[0064] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit.

[0065] A consistent coordination control method for a flexible interconnected DC microgrid group, which is used for a DC microgrid group in which two DC microgrids are flexibly interconnected. The topology of the DC microgrid group is as follows figure 1 As shown, each DC microgrid is provided with a balance unit and a power unit, and the two DC microgrids are connected through an interconnection device.

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Abstract

The invention relates to a consistency coordination control method for a flexible interconnection direct-current microgrid group. Two direct-current micro-grids and an interconnection device are included; the direct-current micro-grids comprise balance units and power units, and the two direct-current micro-grids are connected through an interconnection device, so that the two direct-current micro-grids form an organic whole. According to the invention, linkage of all balance units in the system can be realized, emergency power support is provided for the disturbed microgrid, DC voltage dynamic characteristics of the disturbed microgrid are improved, DC voltage steady-state deviation of the disturbed microgrid is reduced, and disturbance power is borne by the balance units of the whole system according to an equivalent power distribution coefficient ratio; and communication between subsystems is not needed, so that the reliability is high.

Description

technical field [0001] The present application relates to the technical field of flexible interconnection DC system control, and in particular to a method for consistent coordination control of a flexible interconnection DC microgrid group. Background technique [0002] As an important part of the future intelligent power distribution system, the microgrid can organically integrate distributed energy, energy storage equipment, loads, etc., improve the reliability and flexibility of the entire system, and play a role in promoting energy conservation and emission reduction and achieving sustainable energy development. Significance [1-3]. The International Electrotechnical Commission clearly listed microgrid technology as one of the key technologies of the future energy chain in the "White Paper on Coping with Energy Challenges 2010-2030" [4]. The National Energy Administration has clarified the significance of vigorously developing micro-grid technology through documents such...

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Application Information

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IPC IPC(8): H02J1/00H02M3/335
Inventor 陈亮亮邹声奇钟旺刘宇轩
Owner NANCHANG HANGKONG UNIVERSITY
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