Prim-based microgrid source load storage recovery method

A recovery method and microgrid technology, applied in the energy industry, photovoltaic power generation, electrical components, etc., can solve problems such as the inapplicability of small microgrid systems, and achieve the effect of improving reliability

Active Publication Date: 2017-05-10
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The above-mentioned patents require online simulation with a huge amount of data after generating alternatives, which requires the central controller of the microgrid to have powerful data processing capabilities, which is not suitable for small microgrid systems

Method used

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  • Prim-based microgrid source load storage recovery method
  • Prim-based microgrid source load storage recovery method
  • Prim-based microgrid source load storage recovery method

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Embodiment Construction

[0043] The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0044] The Prim-based microgrid source-load-storage restoration method includes the following steps.

[0045] Step 1: Identify the overall topology and equipment status of the microgrid, image 3 Is a typical microgrid topology, calculate the current microgrid operating margin and microgrid stability margin K pMG .

[0046] Step 2: According to the equipment information (including various micro power sources, loads, and energy storage devices, referred to as source, load and storage), encode the equipment to be restored, form a vertex set of a weighted connected undirected graph, and form a vertex set of the current spanning tree T and the vertex set T′ that does not belong to the current spanning tree, initialize the generated edge set Adjacency matrix H:

[0047] ...

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Abstract

The invention relates to a Prim-based microgrid source load storage recovery method. In the method, the source load storage device recovery sequence problem during a microgrid black start problem is equivalent to a path optimization problem, a recovery event serves as a vertex of a weighted connected undirected graph, the negative value of a microgrid stability margin serves as an edge weight among vertexes, all vertexes in the weighted connected undirected graph are searched based on a Prim algorithm idea to generate the minimum spanning tree, and a recovery sequence scheme for the whole microgrid black start process is formed. The microgrid source load storage recovery method has the advantages of being simple, practical, and smooth in recovery, reference is provided for black start of the microgrid, and the microgrid system reliability is improved.

Description

technical field [0001] The invention belongs to the field of microgrid control, and in particular relates to a method for recovering microgrid source, load and storage based on Prim (Prim algorithm, a minimum spanning tree algorithm). Background technique [0002] In recent years, with the rapid development of the economy, the demand for energy has increased sharply, and distributed generation (Distributed Generation, DG) technology has received extensive attention due to its high energy utilization rate and low pollution. Microgrid as its technology Support has received the same attention. The microgrid can not only operate in the grid-connected state as a controllable power generation / consumption unit, but also operate in an island state as a small regional power grid. Through the design idea of ​​microgrid, a large number of distributed power generation problems with random fluctuations can be transformed into a controllable microgrid system power generation problem, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/28H02J3/46
CPCH02J3/383H02J3/28H02J3/38H02J3/46H02J3/388Y02E10/56Y02P80/14
Inventor 杨苹曾智基许志荣郑成立彭嘉俊刘泽健
Owner SOUTH CHINA UNIV OF TECH
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