Microgrid loop planning based on multiple DGs

A technology of microgrid and loop, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problem of lack of research on the construction method of microgrid loop topology

Active Publication Date: 2020-12-04
YANSHAN UNIV
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Problems solved by technology

At present, the research on microgrid planning mainly focuses on the optimization algorithm of microgrid planning, the establishment and solution of DG site selectio

Method used

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  • Microgrid loop planning based on multiple DGs
  • Microgrid loop planning based on multiple DGs
  • Microgrid loop planning based on multiple DGs

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Embodiment Construction

[0086] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0087] The present invention is a micro-grid loop planning based on multiple DGs, which combines and optimizes the node distribution of the system by referring to the relevant knowledge of the graph theory algorithm, establishes a more intuitive mathematical model, and uses the knowledge of the graph theory to realize the constraints in the system Conditions, and finally get the optimized topology.

[0088] Such as Figure 1 to Figure 11 As shown, the steps of the planning include, step 1) under the calculation method based on depth search, search with the node where the DG is located as the root node, and obtain the correlation between the necessary nodes for constructing the ring topology and the DG;

[0089] Step 2) Expressing the microgrid as a graph through an improved graph theory algorithm, and expressing the load points as nodes;

[0090] Step ...

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Abstract

The invention discloses a microgrid loop planning method based on multiple DGs, and belongs to the technical field of microgrid topological structure planning, and the method comprises the steps: 1) taking a node where the DGs are located as a root node for searching, and obtaining the correlation between a necessary node for constructing a loop topological structure and the DGs; 2) representing the microgrid as a graph and representing the load points as nodes through an improved graph theory algorithm; 3) designing a related coarsening stage calculation process, a partitioning stage calculation process and a refining reduction stage calculation process; 4) designing nodes in the preliminary loop into a single loop structure based on an integer linear programming method to obtain an optimized loop topological structure. According to the microgrid loop planning method based on the multiple DGs, the proportion of the points outside the loop and the number of the loop nodes for forming the loop topological structure are considered in loop construction, so compared with a conventional planning method, the method can better guarantee the reasonability of the loop topological structure,and also improves the universality of the planning method in application.

Description

technical field [0001] The invention belongs to the technical field of micro-grid topology planning, and in particular relates to a micro-grid loop planning based on multiple DGs. Background technique [0002] The microgrid can effectively integrate distributed power generation, overcome the disadvantage that distributed power is an uncontrollable source compared with the main grid, and provide a new and effective technical approach for the large-scale application of distributed power generation. Micro-grid planning and design is the premise of micro-grid economic operation. The purpose is to establish a complete planning and design model through feasibility, rationality and environmental friendliness analysis, combined with planning objectives and operating constraints, and find out the capacity of distributed power and energy storage systems. The optimal combination of site optimal configuration and microgrid grid structure, security protection mechanism, energy management...

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Application Information

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IPC IPC(8): G06F30/18H02J3/00
CPCG06F30/18H02J3/00H02J2203/20
Inventor 殷桂梁李云磊刘亚南
Owner YANSHAN UNIV
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