Double-layer economic optimization method for microgrid grid connection

An economic optimization, microgrid technology, applied in complex mathematical operations, instruments, data processing applications, etc., can solve the problem of not considering the power loss of sub-microgrids

Active Publication Date: 2020-08-18
CHINA THREE GORGES UNIV
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Problems solved by technology

However, the power loss in the process of energy mutual aid between sub-microgrids is not considered

Method used

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  • Double-layer economic optimization method for microgrid grid connection
  • Double-layer economic optimization method for microgrid grid connection
  • Double-layer economic optimization method for microgrid grid connection

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Embodiment Construction

[0015] A two-layer economic optimization method for grid-connected microgrids, comprising the following steps:

[0016] Step 1: Construct the optimization model of the lower microgrid;

[0017] Step 2: Solve the power purchase / sale potential of each microgrid participating in the upper-level transaction, as well as the purchase / sale price information;

[0018] Step 3: Construct the upper layer optimization model of the energy transfer path;

[0019] Step 4: Based on the JAYA-Dijkstra algorithm, solve the lower-level microgrid optimization model and the upper-level optimization model to obtain the optimal transmission path of the output power of each microgrid.

[0020] In the step 1,

[0021] Establish the optimization model of the lower microgrid, and its total economic cost formula is:

[0022]

[0023] in,

[0024] f is the total cost of running the lower-level optimization model;

[0025] SU i,t 、SD i,t Respectively, the fuel cost, maintenance cost, start-up co...

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Abstract

The invention discloses a double-layer economic optimization method for microgrid grid connection, and the method comprises the steps: 1, building a lower-layer microgrid optimization model; 2, solving the electricity purchasing / selling potential of each microgrid participating in the upper-layer transaction and electricity purchasing / selling price information; 3, constructing an upper-layer optimization model of the energy transfer path based on a graph theory; and 4, based on a JAYA-Dijkstra algorithm, solving the lower-layer microgrid optimization model and the upper-layer microgrid optimization model to obtain an optimal transmission path of the output power of each microgrid. According to the double-layer economic optimization method for microgrid grid connection, the economic benefits of multiple microgrids can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of micro-grid optimization, in particular to a two-layer economic optimization method for grid-connected micro-grid. Background technique [0002] With the continuous depletion of global fossil energy, the development of renewable distributed energy has attracted widespread attention. As an effective way of on-site consumption of new energy power generation, microgrid has developed rapidly, and multi-microgrid composed of multiple microgrids through energy mutual aid has attracted much attention. The economy of multi-microgrid operation is a key factor to attract a large number of users and increase the penetration rate in large-scale power systems, but the economic benefits of multi-microgrid have not yet been well reflected. The uncertainty of the economic benefits of multi-microgrid will become an important reason hindering the development of microgrid. Therefore, it is necessary to further strengthen a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G06Q10/04G06Q50/06
CPCG06F17/10G06Q10/04G06Q50/06Y04S10/50
Inventor 王灿应宇辰董庆国余宏亮杨楠刘颂凯
Owner CHINA THREE GORGES UNIV
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