Multi-microgrid connection line power optimization method based on leader-follower game

A tie-line power and optimization method technology, which is applied in the field of multi-microgrid tie-line power optimization based on the master-slave game, can solve problems such as not considering the influence of multi-microgrid stability, and reduce three-phase unbalance and loss Small, reduce the effect of equipment loss and grid power loss

Active Publication Date: 2017-02-01
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

This invention effectively optimizes and manages the operation of the multi-microgrid, but does not consider the influence of the three-phase unbalance of the tie line on the stability of the multi-microgrid in the process of establishing the model and solving the problem

Method used

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  • Multi-microgrid connection line power optimization method based on leader-follower game
  • Multi-microgrid connection line power optimization method based on leader-follower game
  • Multi-microgrid connection line power optimization method based on leader-follower game

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] figure 1 It is a single three-phase multi-microgrid topological structure diagram, and the present invention designs a master-slave game-based multi-microgrid tie line power optimization method based on the topology.

[0032] figure 2 It is a flowchart of a multi-microgrid tie-line power optimization method based on the master-slave game, and its specific steps are as follows:

[0033]Step 1: Through the economic optimization of the day before, that is, the economic optimization of the next day's operation mode is carried out to obtain the original power P of the tie line power a ,P b ,P c ;

[0034] Step 2: According to the topological structure of multi-microgrids, using game theory and using the Stackelberg dynamic game method to establish the revenue model of the upper-leve...

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Abstract

The invention discloses a multi-microgrid connection line power optimization method based on a leader-follower game. The method considers a three-phase unbalance constraint of a system, a game theory is applied, a Stackelber master-slave dynamic game method is adopted, an optimized mathematical model of each main body in a multi-microgrid is built, the power of an upper-layer connection line of the multi-microgrid is jointly solved based on particle swarm optimization, and the unbalance degree of the power of the upper-layer connection line of the multi-microgrid is enabled to be smaller than 15%; a simulation example tests that the proposed method can conform to that the loss of each sub-microgrid is minimum on the condition the three-phase unbalance requirement of the system is satisfied; and the three-phase power of the power of a top-layer connection line of the multi-microgrid is unbalanced due to the problems of inconsistent power utilization habits of a user of each single-phase sub-microgrid and the like, and when the three-phase unbalance state of the system is serious, the loss of a power distribution and transformation line will be increased and even cannot normally run. By the multi-microgrid connection line power optimization method based on the leader-follower game, the running economy of the system can be improved on the basis that the three-phase unbalance degree of the system is enabled to conform to a certain condition.

Description

technical field [0001] The invention relates to the technical field of multi-microgrid economic optimization, in particular to a multi-microgrid tie-line power optimization method based on a master-slave game. Background technique [0002] With the rapid development of the renewable energy industry, a large amount of renewable energy is connected to the large power grid, among which distributed access is the most widely used. It is generally considered to be one of the effective ways to use distributed power to connect distributed power to distribution network through microgrid, which can effectively reduce the impact of distributed power's indirectness and volatility on large power grid. Microgrid is a power generation and distribution system that organically integrates distributed power generation devices, converters, loads, energy storage devices, and monitoring and protection control devices. It has the advantages of autonomous operation, multi-energy complementarity, op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26H02J3/38
CPCH02J3/26H02J3/381H02J2203/20Y02E40/50
Inventor 许志荣杨苹张育嘉何婷梁颖琪刘泽健
Owner SOUTH CHINA UNIV OF TECH
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