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Grid-connected and off-grid automatic switching method, system and device, electronic equipment and electric cabinet

An automatic switching, off-grid technology, applied in circuit devices, AC network circuits, electrical components, etc., can solve problems such as single function, battery energy storage system is difficult to automatically enter the normal operation state, and does not have off-grid function.

Inactive Publication Date: 2021-04-27
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the conventional cabinet-type battery energy storage systems are grid-connected systems at present, and some do not have the off-grid function, and the function is relatively single. To ensure the normal power consumption of the load, and before the power of the entire battery energy storage system is exhausted, if the grid has not entered the normal power supply state, the battery energy storage system may enter a complete shutdown state at this time, even if the grid is restored, the battery storage It will also be difficult for the system to automatically enter normal operation

Method used

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  • Grid-connected and off-grid automatic switching method, system and device, electronic equipment and electric cabinet
  • Grid-connected and off-grid automatic switching method, system and device, electronic equipment and electric cabinet
  • Grid-connected and off-grid automatic switching method, system and device, electronic equipment and electric cabinet

Examples

Experimental program
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Effect test

Embodiment 1

[0052] An embodiment of the present invention provides an on-grid automatic switching method, and instructions corresponding to the on-grid automatic switching method can be executed by the processor of the energy management system in an energy management system (Energy Management System, EMS), or can be Executed by the processor of the control system in any independent control system with command processing capability, and off-grid may refer to grid-connected and / or off-grid, such as figure 1 , the on-grid automatic switching method includes:

[0053] receiving a power supply state transition signal of the power grid, and determining that the power grid transition state corresponding to the power supply state transition signal is a transition state from power to no power;

[0054] Controlling the load to be connected to the circuit of the power grid and disconnecting the off-grid switch, and controlling the energy storage system to switch to an off-grid operation state, where...

Embodiment 2

[0062] The embodiment of the present invention and Embodiment 1 belong to the same inventive concept. The embodiment of the present invention provides an on-grid and off-grid automatic switching system, and the on-grid and off-grid automatic switching system includes:

[0063] a determining module, configured to receive a power supply state transition signal of the power grid, and determine that the power grid transition state corresponding to the power supply state transition signal is a transition state from power to no power;

[0064] The control module is used for controlling the load to be connected to the circuit of the power grid and disconnecting the off-grid switch, and to control the energy storage system to be converted into an off-grid operation state, wherein the energy storage system in the off-grid operation state is responsible for all supply power to the load;

[0065] The determining module is further configured to re-receive the power supply state transition...

Embodiment 3

[0070] The embodiments of the present invention belong to the same inventive concept as Embodiments 1 and 2. The embodiments of the present invention provide an on-grid and off-grid automatic switching device, which can be used in a battery energy storage system or as a battery storage device for electricity users. capable systems, such as figure 2 and image 3 , the on-grid and off-grid automatic switching device includes:

[0071] energy management system;

[0072] On-grid and off-grid switching systems, including on-grid and off-grid switches and detection switches;

[0073] The detection switch is connected to the power grid and also connected to the energy management system, for feeding back a power supply state transition signal of the power grid to the energy management system;

[0074] the on-grid switch is connected to a load and is also connected to the grid;

[0075] The energy management system is connected to the on-grid switch, and is used for connecting the...

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Abstract

The invention provides a grid-connected and off-grid automatic switching method, system and device, electronic equipment and an electric cabinet and belongs to the technical field of batteries. The method comprises steps of receiving a power supply state conversion signal of a power grid, and determining that a power grid conversion state corresponding to the power supply state conversion signal is a conversion state from a power-on state to a power-off state; a load being controlled to be connected into a loop of the power grid, a grid-connected and off-grid switch being switched off, an energy storage system being controlled to be converted into an off-grid operation state, and the energy storage system in the off-grid operation state supplying power to the load; receiving a power supply state conversion signal of the power grid, and determining that the power grid conversion state corresponding to the re-received power supply state conversion signal is a conversion state from no power to power; and the grid-connected and off-grid switch being controlled to be closed, the energy storage system being controlled to be converted into a grid-connected operation state, and the energy storage system in the grid-connected operation state at least stopping supplying power to the load. The invention can be used for a battery energy storage system.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an on-grid and off-grid automatic switching method, an on-grid and off-grid automatic switching system, an on-grid and off-grid automatic switching device, an electronic device and an electric cabinet. Background technique [0002] In recent years, with the rapid rise of wind energy, solar energy and other renewable energy and smart grid industries, energy storage and energy management technologies have gradually become one of the focuses. The battery energy storage system can realize the use of energy in a specific time and space, utilize energy rationally, and improve the efficiency of energy use. The battery energy storage system is considered as a strategic technology to support the popularization of renewable energy. [0003] However, among the conventional cabinet-type battery energy storage systems, most of them are grid-connected systems, and some do not have off-grid f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32H02J9/06
CPCH02J3/32H02J3/381H02J9/068H02J2300/20
Inventor 李庆王君生谈作伟靳庆林
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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