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Large-scale energy storing device and main circuit thereof

An energy storage device, large-scale technology, applied in circuit devices, battery circuit devices, current collectors, etc., can solve the problem of not giving examples of large-scale energy storage applications, avoid failure and shutdown conditions, and wide access voltage range , The effect of strong anti-electromagnetic interference ability

Active Publication Date: 2014-04-02
XJ POWER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In the prior art, there are also electric vehicle charging and discharging stations, such as the Chinese patent document "Electric Vehicle Charging Station with Energy Storage Device" with application number 20100532726. The system disclosed in this document does not provide a system suitable for large-scale storage. Possible application examples

Method used

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  • Large-scale energy storing device and main circuit thereof
  • Large-scale energy storing device and main circuit thereof

Examples

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing, the utility model is described in further detail.

[0036] Note: The AC / DC or AC / DC (DC / AC) modules below and in the drawings all refer to converters.

[0037] Main circuit embodiment

[0038] figure 1It is the circuit topology of the energy storage device in which each AC port corresponds to a group of DC ports, each AC port corresponds to an energy storage unit, and the power of each unit is 250kW. Each unit includes a converter on the grid side and a DC / DC on the DC side. As shown in the figure, there are two converters (1#AC / DC, 2#AC / DC), and the DC side of each converter is connected with five DC / DC modules, and one end of each DC / DC module is connected to the converter The other end corresponds to a pair of DC ports, and each pair of DC ports is used to connect a group of energy storage batteries. The converter is a three-phase rectification (inversion) module. The DC side of the converter is connected with a su...

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Abstract

The invention provides a large-scale energy storing device and a main circuit thereof. The main circuit comprises at least one energy storing unit; each energy storing unit comprises one converter and at least two DC (direct current) / DC modules; one side of the converter is connected with a power supply and the other side of the converter is connected with the DC / DC modules; each DC / DC module is correspondingly connected with a group of energy storing batteries; a monitoring platform comprises a background monitor, a coordinated controller and converter controllers as well as DC / DC controllers; and the background monitor is connected with the coordinated controller by an RS485 bus in a communication mode. The monitoring platform is of a layered distribution structure, and the coordinated controller is used for controlling the converter controllers and DC / DC controllers at the bottom layer uniformly, thus realizing the uniform coordinated action in the real-time control and avoiding the failure shutdown caused by uncoordinated actions.

Description

technical field [0001] The utility model relates to the field of new energy, in particular to a large-scale energy storage device. Background technique [0002] First of all, the definition of energy storage device referred to in this article is: a device that is matched with an energy storage battery pack, connected between the battery pack and the grid, and stores grid power into the battery pack or feeds back the energy of the battery pack to the grid. converter and its control system. [0003] Large-scale energy storage technology can solve the randomness and volatility problems of new energy power generation and electric vehicle charging to a large extent, can realize the smooth output of new energy power generation, and can effectively adjust the grid voltage caused by new energy power generation and electric vehicle charging , frequency and phase changes, so that large-scale wind power and solar power generation can be easily and reliably integrated into the conventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/02H02J7/00
Inventor 张建兴陈天锦王定国陈世峰魏众李正力李俊霞王涛张冲
Owner XJ POWER CO LTD
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