A large-scale energy storage device and its main circuit

An energy storage device, large-scale technology, applied in circuit devices, battery circuit devices, current collectors, etc., can solve problems such as no example of large-scale energy storage applications, avoid failure and shutdown conditions, protect reliable, access The effect of a wide voltage range

Active Publication Date: 2011-12-21
XJ POWER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 Sto

Method used

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  • A large-scale energy storage device and its main circuit
  • A large-scale energy storage device and its main circuit
  • A large-scale energy storage device and its main circuit

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[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 connec...

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PUM

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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 invention 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 conventional...

Claims

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Application Information

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IPC IPC(8): H02J7/02H02J7/00
Inventor 张建兴陈天锦王定国陈世峰韩健仇志凌李正力王涛张冲
Owner XJ POWER CO LTD
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