Low voltage microgrid group independent coordination control system

A technology for coordinating control systems and micro-grid controllers, applied in system integration technology, information technology support systems, photovoltaic power generation, etc., can solve problems such as inability to use distributed resources, achieve considerable economic benefits, improve utilization rates, and increase acceptance effect of ability

Active Publication Date: 2015-08-12
CHINA AGRI UNIV
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Problems solved by technology

[0004] The traditional single microgrid only has two modes of off-grid operation and grid-connected operation. It cannot use the distributed resources in other microgrids during operation, and cannot fully realize the maximum utilization of renewable energy and maximize the reliability of power supply for loads. sex

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  • Low voltage microgrid group independent coordination control system
  • Low voltage microgrid group independent coordination control system
  • Low voltage microgrid group independent coordination control system

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are only used to illustrate the present invention, but can not be used to limit the scope of the present invention.

[0026]The autonomous and coordinated system of the low-voltage microgrid group includes load controllers, wind power controllers, photovoltaic controllers, energy storage controllers, sub-microgrid controllers, and microgrid group controllers. The network control layer and group control layer adopt dual-network redundancy Ethernet communication network.

[0027] The microgrid group adopts a three-layer control structure, namely the equipment layer, the network control layer and the group control layer. This structure model introduces the communication system but does not completely rely on it. Maintain the stable operation of the microgrid.

[0028] (1) Group control...

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Abstract

Provided is a low voltage microgrid group independent coordination control system, employing a layered control structure, i.e., an equipment layer, a grid control layer and a group control layer. A microgrid group controller receives a scheduling instruction of a group level energy management system; based on the safety and reliability of a control target of the microgrid group and sub microgrids, the microgrid group controller controls exchanging power between a microgrid group and a power distribution network and each sub microgrid, grid disconnection or grid connection of the microgrid group, and grid connection or grid disconnection of the sub microgrids, realizes interface control between the sub microgrids and the microgrid group, and meanwhile issues a control instruction to a grid level controller. The grid level controller works out optimal control strategies of distributed power supply, energy storage and load, and realizes stable operation and smooth transition among states of the sub microgrids in a grid connection state, and information communication with the microgrid group controller. A supply or energy storage local controller completes primary regulation of frequency and voltage of distributed power supply and energy storage; a load controller completes load grading control.

Description

technical field [0001] The invention relates to the field of operation and control of micro-grid groups in the field of renewable energy power generation, in particular to an autonomous and coordinated control system for low-voltage micro-grid groups. Background technique [0002] The emergence of the microgrid has fundamentally changed the traditional way of coping with load growth. From a system perspective, the microgrid, as a controllable unit, can flexibly expand the system capacity, and can use redundant parallel connections to improve system reliability. It has extremely high system reliability. maintainability. However, due to the insufficient capacity of large-scale renewable energy consumption in my country's power grid, the relatively weak power distribution link, and the low level of electricity interaction, as well as the urgent demand for smart grid technology in the development of electric vehicles and energy storage technologies, it is proposed The concept of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00H02J3/38
CPCY04S10/123Y04S40/124Y02E10/56Y02E10/76Y02E40/70Y02E60/00
Inventor 杨仁刚高春凤井天军王文成王江波全雯琳
Owner CHINA AGRI UNIV
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