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Micro-gird system and control method thereof

A micro-grid and controller technology, applied in the field of micro-grid, can solve the problems of insufficient real-time energy dispatching and insufficient fault tolerance rate, etc.

Active Publication Date: 2016-10-26
SHENZHEN SINEXCEL ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a micro-grid system and its control method for the defects of insufficient real-time energy scheduling and insufficient fault tolerance rate in the micro-grid in the prior art

Method used

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  • Micro-gird system and control method thereof

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Embodiment Construction

[0030] In order to explain the features, objectives and technical effects of the present invention more clearly, the present invention will be described in detail in conjunction with the accompanying drawings and specific embodiments.

[0031] see figure 2As shown, the microgrid system includes an AC bus (AC_BUS) 1 , a DC bus (DC_BUS) 2 , four branches 3 , 4 , 5 , 6 respectively connected in parallel to the DC bus 2 , and a power grid 7 . Among them, the DC bus 2 supports access to DC loads 21 , bidirectional charging and discharging motors 22 , DC-DC photovoltaics 23 , and DC-DC energy storage 24 .

[0032] In this embodiment, the four branches are: DC / DC photovoltaic branch 3, DC / DC energy storage battery branch 4, DC / DC supercapacitor branch 5, and all connected to the grid 7 and the AC bus 1 Connected DC / AC branch 6. The four branches serve as distributed power sources of the microgrid system.

[0033] Among them, the three DC / DC branches output the corresponding DC cu...

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Abstract

The present invention provides a micro-gird system and a control method thereof. The system comprises an alternating current bus, a direct current bus and four branches connected in parallel on the direct current bus; the direct current bus accesses reducing four-grade direct current bus voltage in order; and the micro-gird system realizes switching between voltages of the four grades. The micro-gird system and the control method thereof employ a distributed power supply to realize the energy scheduling of the microgrid through different direct current bus with no need for using a communication mode, and the deficiency of the scheduling timeliness and the deficiency of the tolerable error rate are made up; the micro-gird system and the control method thereof are compatible with a plurality of devices, the modularization and the tower-type machine control thinking are consistent, the external feature of the micro-gird system is a tower-type control mode, and a remote background faces an energy storage current transformer; and the micro-gird system can support the modularization and support multi-group distribution power supply access, so that the upper layer is a tower type, and the lower layer is the concept of multi-group module access.

Description

technical field [0001] The present invention relates to the field of micro-grid technology, and more specifically, to a micro-grid system and a control method thereof. Background technique [0002] Micro-grid (Micro-Grid, also translated as micro-grid) is a new network structure composed of multiple distributed power sources and their related loads according to a certain topology, and is connected to the conventional power grid through static switches. [0003] The microgrid includes a DC bus and an AC bus. As a microgrid that connects the distributed power supply and the main grid, the DC bus can more efficiently play the value and benefits of the distributed power supply, and has more flexible reconfiguration capabilities than the AC microgrid. . [0004] figure 1 Shown is a schematic diagram of the circuit structure of the existing microgrid, the microgrid includes an AC bus (AC_BUS) 10, a DC bus (DC_BUS) 20, and a power conversion system (Power ConvertSystem, PCS) betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/32H02J3/381Y02E70/30
Inventor 任远航范小波肖顿
Owner SHENZHEN SINEXCEL ELECTRIC