AC and DC hybrid micro-grid optimal planning method considering line factor

Abstract

The invention discloses an AC and DC hybrid micro-grid optimal planning method considering a line factor. The method comprises: establishing a target function of an AC and DC hybrid micro-grid considering a line factor relative to investment cost, loss load cost, and system loss, comprehensively considering system power constraint, system branch constraint, distributed energy output constraint, node voltage deviation constraint, random fault constraint of equipment and other constraints, using Monte Cario to perform fault sampling, through mixed integer linear programming, solving, to obtain ascientific and economical AC and DC hybrid micro-grid distributed power addressing capacity grading optimal configuration result. The method solves a configuration problem of effective access of a distributed power supply in expansion planning of an AC micro-grid, improves on-site elimination capability of the hybrid micro-grid, and meanwhile realizes economical efficiency and reliability of planning of the AC and DC hybrid micro-grid.

Description

technical field [0001] The invention relates to the field of planning and design of an AC-DC hybrid micro-grid, and more specifically relates to an optimal planning method for addressing and capacity-dividing distributed power sources of an AC-DC hybrid micro-grid considering line factors. Background technique [0002] Distributed renewable energy has been widely used in recent years because of its cleanliness, environmental protection and renewable characteristics. In order to improve the utilization rate of renewable energy and reduce the energy loss when renewable energy is connected to the traditional power grid, an AC-DC hybrid microgrid emerges as the times require. Because the AC-DC hybrid microgrid is composed of two parts, the AC microgrid and the DC microgrid, it has its unique advantages in accepting distributed energy and meeting the demands of AC and DC loads. [0003] When carrying out the optimal planning of the AC-DC hybrid microgrid, it is necessary not onl...

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Problems solved by technology

[0005] 1. In the optimization planning of AC-DC hybrid microgrid, only converters, power electronic transformers and other equipment are considered as the main considerations, and the problems of microgrid lines, such as line costs, line losses and line faults, are not taken into account. Therefore, Affected the optimal configuration results;

[0006] 2. In the current research results, the total capacity of the distributed power generation is directly calculated, and the access point and access capacity of the distributed power generation are not planned as the research object, so the planning results are not accurate and refined;

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