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Local stability maintenance type microgrid

A stability-maintaining, micro-grid technology, applied in the field of micro-grids, can solve the problems of unfavorable distributed power stable output, distributed power dependence, and inflexible charging, so as to improve the ability to resist voltage interference, improve flexible settings, and improve stable effect

Pending Publication Date: 2021-02-09
芜湖泰伦特能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing micro-grid energy storage devices either cannot be charged flexibly and have large usage restrictions; or they are charged directly through distributed power sources, which is highly dependent on distributed power sources and is not conducive to the stable output of distributed power sources

Method used

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Embodiment Construction

[0021] refer to figure 1 , A local stability-maintaining microgrid proposed by the present invention includes: a microgrid bus A, a distributed power source, an energy storage module, a bidirectional inverter, a load and a microgrid controller.

[0022] The energy storage module is connected to the microgrid bus A through the bidirectional inverter. According to the charging and discharging state of the bidirectional inverter, the energy storage module can either draw electric energy from the microgrid bus A for charging, or supply power to the microgrid bus A. Specifically, the energy storage module may use a battery or a super capacitor.

[0023] Both the distributed power source and the load are connected to the microgrid bus A, and the distributed power source is used to supply power to the microgrid bus A. Specifically, in this embodiment, the distributed power sources include: a hydroelectric power generation system, a wind power generation system, a photovoltaic power ...

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Abstract

The invention provides a local stability maintenance type microgrid, which comprises a microgrid bus, a distributed power supply, an energy storage module, a bidirectional inverter, a load and a microgrid controller, the energy storage module is connected with the microgrid bus through the bidirectional inverter. The distributed power supply and the load are connected with the microgrid bus. The microgrid controller is connected with the microgrid bus, the energy storage module and the bidirectional inverter. And the microgrid controller is used for controlling the bidirectional inverter to work according to the main circuit voltage and the residual electric quantity, the main circuit voltage is the voltage of the microgrid bus, and the residual electric quantity is the real-time electricquantity of the energy storage module. According to the local stability maintenance type microgrid provided by the invention, when the voltage of the main circuit is too low, the microgrid bus can beboosted through the discharge of the energy storage module, so that the voltage interference resistance of the microgrid bus is improved, the stability of the voltage of the main circuit is improved,and the power supply reliability of the microgrid is improved.

Description

technical field [0001] The invention relates to the technical field of microgrids, in particular to a local stability maintenance type microgrid. Background technique [0002] The stable operation of the microgrid is the prerequisite for the safe, reliable operation and benefit of the microgrid. Only when the microgrid can be connected to the grid, the isolated grid is stable, the isolation is fast enough, and the switching is seamless, and the plug-and-play of the microgrid can be fully realized. Due to the characteristics of low overload capacity, low inertia or no inertia, and the sudden change of load in the microgrid, distributed generation power sources in the microgrid are easy to cause oscillation or even collapse of the microgrid system, which seriously restricts the development and application of the microgrid. In order to improve this situation, energy storage devices are usually used in the current microgrid structure to maintain the transient stability of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/24
CPCH02J3/32H02J3/24
Inventor 王明君
Owner 芜湖泰伦特能源科技有限公司
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