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Distributed global optimum energy management system based on an alternating direction method of multipliers

An energy management system, technology of alternating direction multipliers, applied in the field of distributed global optimal energy management system

Active Publication Date: 2016-05-04
SYSU CMU SHUNDE INT JOINT RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a distributed global optimal energy management system based on the Alternate Direction Multiplier Algorithm, which is a distributed energy management system based on multiple energy storage devices under a single microgrid The global optimal energy management system, in the case of meeting the user's electricity demand, also considers the energy supply and demand balance conditions in the node, transmission line loss, intermittent nature of renewable energy generators, dynamic changes in load, and the charging of the energy storage system itself. Influenced by factors such as discharge efficiency, by tracking the state of charge of the energy storage system and reasonably adjusting the energy exchange of adjacent nodes, the total energy consumption of the microgrid can be minimized

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  • Distributed global optimum energy management system based on an alternating direction method of multipliers

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0060] figure 1 Shown in is a small-scale, low-voltage microgrid consisting of five nodes, each of which is composed of distributed generators, energy storage systems, and loads. Through circuit breakers, the microgrid can be connected to the main grid or run in an island. u shown in the figure i (i=1,2,3,4,5) represents the power flowing on the i-th transmission line, when u i >0, it means that the flow direction of power is the same as that of the arrow; when u i <0, indicating that the direction of power flow is opposite to the direction of the arrow. For each node, the supply and demand balance of power flow needs to be maintained in real time:

[0061] P G (t)-P L (t)+Bu(t)-P B (t)=0(1)

[0062] Among them, P G (t) is the vector form of local distributed generator power, P L (t) is th...

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Abstract

The invention discloses a distributed global optimum energy management system based on an alternating direction method of multipliers. The distributed global optimum energy management system is a system taking a plurality of energy storage devices as units under a single microgrid, the microgrid comprises different nodes, each node is connected with a corresponding energy storage module, an energy management module, a dynamic load and a renewable energy power generator, different nodes are connected with one another through a topological graph mode, information can be exchanged between adjacent nodes, the energy management parameter of each node is synchronously updated through information exchange, so that the total energy consumption of the whole microgrid is adjusted to global minimum in real time. By tracking a charge status of the energy storage module and simultaneously considering factors such as the energy supply and demand balance condition of the microgrid, the loss of a transmission line, the discontinuity of the renewable energy power generator, the dynamic change of a load and the charging / discharging efficiency of the energy storage system, the power flow on a power line is dynamically minimized, and the purpose of reducing power loss is achieved.

Description

technical field [0001] The invention relates to the field of smart grids, and more particularly, to a distributed global optimal energy management system based on an alternating direction multiplier algorithm. Background technique [0002] With the development of the national economy, the demand for electricity from industry, commerce, residents, and electric vehicles has grown steadily and rapidly. . The traditional power system is in the form of centralized power supply, through long-distance transmission lines to scattered end users. With the continuous expansion of the power grid, the disadvantages of this form of power supply are increasingly prominent, with poor robustness and difficulty in operation, and it is difficult to adapt to the increasingly high safety and reliability requirements of users and diversified power supply needs, such as New York City, Taiwan The island's second blackout has sounded the alarm for us. In order to suppress the spread of this trend...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/00
CPCH02J3/00H02J3/28H02J2203/20Y02E70/30
Inventor 杨柏桐许银亮
Owner SYSU CMU SHUNDE INT JOINT RES INST
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