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Microgrid communication topology design method based on network mirror image and global propagation rate

A technology of network mirroring and design method, applied in the direction of AC network circuit, data exchange network, transmission system, etc., can solve problems such as unsatisfactory reactive power distribution effect and voltage steady-state deviation.

Active Publication Date: 2020-04-28
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

However, since the droop control is proportional difference control, it will cause voltage steady-state deviation, and the effect of reactive power distribution is not ideal. Therefore, it is necessary to adopt secondary cooperative control to assist voltage recovery and reactive power sharing. It is an effective way to realize cooperative control

Method used

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  • Microgrid communication topology design method based on network mirror image and global propagation rate
  • Microgrid communication topology design method based on network mirror image and global propagation rate
  • Microgrid communication topology design method based on network mirror image and global propagation rate

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Embodiment Construction

[0068] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0069] The present invention designs a micro-grid communication topology design method based on network mirroring and global transmission rate, which is used to realize the control of information interaction in the drooping operation mode of the island micro-grid. In practical applications, such as figure 1 As shown, it specifically includes the following steps:

[0070] Step A. Determine the connectivity of all distributed directional communication networks in the microgrid, select a connected directional communication network as a candidate communication network, and then enter step B.

[0071] In the above step A, among all the distributed directed communication networks of the microgrid, the connected distributed directed communication network is selected as the candidate communication network of the microgrid accor...

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Abstract

The invention relates to a microgrid distributed communication topology design method based on a network mirror image and a global propagation rate. The method comprises the following steps: firstly,judging the communication connectivity of a microgrid distributed directed network; for the connected directed communication network, obtaining a mirror image network based on a mirror image operation, and selecting an optimal distributed directed communication topology corresponding to the maximum performance index based on algebraic connectivity and communication cost; for the optimized distributed communication topology, solving a containment distributed power supply set corresponding to different containment numbers based on a global propagation rate and the out-degree; finally, based on the optimal distributed communication network and the containment point of the microgrid, establishing the microgrid distributed secondary voltage control, and achieving reactive power equalization andaverage voltage recovery. The design method is based on a graph theory, takes algebraic connectivity, node out-degree and global propagation rate as control objectives, provides a basis for control structure design of distributed secondary control, realizes reactive power equalization and average voltage recovery, and further improves the dynamic performance of the microgrid.

Description

technical field [0001] The invention relates to the technical field of microgrid operation control, in particular to a microgrid communication topology design method based on network mirroring and global propagation rate. Background technique [0002] With the depletion of the earth's resources and people's attention to environmental issues, the access to renewable energy has attracted more and more attention from all over the world. Microgrid is an emerging energy transmission mode that increases the penetration rate of renewable energy and distributed energy in the energy supply system, and its components include different types of distributed energy resources (DER, including micro gas turbines, wind turbines, Photovoltaic, fuel cells, energy storage equipment, etc.), user terminals of various electrical loads and / or thermal loads, and related monitoring and protection devices. [0003] The power supply inside the microgrid is mainly responsible for energy conversion by p...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L29/08H02J3/38
CPCH04L67/1095H04L41/042H04L41/0823H04L41/12H02J3/381H02J3/388H02J3/46H02J13/00002Y02E40/70Y02E60/00Y02P80/14Y04S10/12Y04S10/30Y04S40/126H02J13/00022H04L41/145
Inventor 楼冠男洪吟秋顾伟盛丽娜杨权
Owner SOUTHEAST UNIV
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