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Micro-grid power balance control method using large power grid as virtual energy storage

A technology of virtual energy storage and power balance, applied in the direction of AC network load balancing, etc., can solve the problems of distributed power supply quality grid impact, micro-grid large penetration rate, etc., to achieve the effect of suppressing pollution and reducing penetration rate

Inactive Publication Date: 2013-10-16
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a micro-grid power balance control method using the large power grid as virtual energy storage to solve the problem that the large penetration rate of the micro-grid and the power quality of distributed power sources have a greater impact on the power grid

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Embodiment Construction

[0019] The microgrid uses the large grid connected to it as its own energy storage device. The meaning of virtual energy storage is that the large grid acts as a backup power source for the microgrid, and only transmits the power of the microgrid, but does not accept the feed power of the microgrid.

[0020] A microgrid power balance control method using the large grid as virtual energy storage, using the large grid connected to the microgrid as a virtual energy storage system, when the distributed power supply power in the microgrid is insufficient, absorbing power from the large grid as the microgrid Internal load power supply, when the distributed power supply power of the micro-grid exceeds the power required by the internal load of the micro-grid, the output of the distributed power is controlled through the micro-grid power regulation system, so that the output of the distributed power strictly matches the internal load of the micro-grid , so that the output power of the ...

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Abstract

The present invention relates to a micro-grid power balance control method using a large power grid as virtual energy storage. According to the method, the large power grid connected with micro-grids is used as a virtual energy storage system; when the power of a distributed power supply in the micro-grids is insufficient, power in the large power grid is absorbed for powering the load in the micro-grids; and when the power of the distributed power supply in the micro-grids exceeds the required power of the load in the micro-grids, the output of the distributed power supply is controlled by a micro-grid power adjusting system so as to be strictly matched with the load in the micro-grids, such that the output power of the distributed power supply in the micro-grids flowing to the large power grid is lower than a preset threshold. By using the method, the output of the distributed power supply and the size of the load in the micro-grids can be balanced in real time, and the permeability of the distributed power supply in the large power grid is reduced at the maximum, thereby inhibiting the pollution of the energy quality of the large grid caused by the distributed power supply, and providing a basis for popularizing the application of the distributed power supply.

Description

technical field [0001] The invention belongs to the technical field of micro-grid control, and relates to a micro-grid power balance control method using a large power grid as virtual energy storage. Background technique [0002] With the conventional energy crisis and global climate change becoming increasingly prominent, renewable distributed energy sources such as wind energy and solar energy are developing rapidly. , It is difficult to meet the increasing reliability and diversified electricity demand of users. In view of the above problems, scholars at home and abroad have begun to extensively study distributed power generation technology. Distributed power generation is flexible and decentralized, and can be used as a backup with the power grid. To a certain extent, it shares the function of the transmission network from the power plant to the user for long-distance and high-power transmission. But compared to the power grid, distributed power is an uncontrollable pow...

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Application Information

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IPC IPC(8): H02J3/28
Inventor 李富生杨恢宏唐云龙雷振锋王若醒路进升刘桂莲
Owner STATE GRID CORP OF CHINA
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