A primary side integrated modular independent control battery energy storage system

A battery energy storage system and independent control technology, applied in the field of energy storage systems, can solve the problems of large current stress, high cost, and large conduction loss of devices, and achieve the effects of small control power, small absolute loss, and reduced weight

Active Publication Date: 2019-07-19
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the purpose of the present invention is to provide a primary-side integrated modular independent control battery energy storage system to solve all the problems of switching devices flowing through the battery modules in the existing full-power modular flexible group energy storage system. Charge and discharge current, which leads to the problems of large device current stress, high cost and large conduction loss

Method used

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  • A primary side integrated modular independent control battery energy storage system
  • A primary side integrated modular independent control battery energy storage system
  • A primary side integrated modular independent control battery energy storage system

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Embodiment Construction

[0049] Embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. In addition, in this specification, the same code|symbol represents the same part.

[0050] image 3 It is the main circuit diagram of the preferred embodiment of the battery energy storage system of the present invention, such as image 3 As shown, the battery energy storage system of the present invention includes:

[0051] A battery unit 100, wherein the battery unit 100 includes multiple sets of battery modules 110 connected in series;

[0052] The main power converter 200 is connected in parallel with the battery unit 100, the main power converter 200 i...

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Abstract

The invention discloses a primary-side integrated modularized independent control battery energy storage system. The battery energy storage system includes a battery unit, which is composed of multiple sets of battery modules connected in series; a main power converter, used to control the main Current, the main power converter is connected in parallel with the battery unit, and the main power converter is connected to the three-phase AC grid; and the auxiliary power converter is connected to multiple sets of battery modules and performs closed-loop independent control on each set of battery modules, which is used to control The difference between the charging and discharging current of each battery module and the main current. The invention realizes the independent control of the differential current part of the battery module through the main power converter and the auxiliary power converter, without independent control of all battery currents, and the primary side adopts an integrated single winding structure to reduce the loss of the converter and cost, and improve the energy utilization rate of the battery module.

Description

technical field [0001] The invention relates to the field of energy storage systems and the field of power electronic converters, in particular to a primary-side integrated modular independent control battery energy storage system. Background technique [0002] As environmental and energy issues become the focus around the world, renewable energy power generation has developed into an important driving force for smart grids, and its intermittency and volatility have an impact on grid voltage and frequency. Among them, the battery energy storage system has attracted much attention due to its functions of alleviating the power fluctuation of intermittent power supply and optimizing the quality of power grid. [0003] figure 1 It is a schematic diagram of a traditional battery energy storage system. Such as figure 1 As shown, hundreds of single batteries are concentrated in series, and a centralized high-power converter is used to connect to the grid. Due to the inconsisten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02M3/335
CPCH02J3/32H02M3/285H02M3/33561H02M3/33584H02M1/0067Y02E40/10
Inventor 梁晖李乾李丹
Owner BEIJING JIAOTONG UNIV
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