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Low-power-consumption single-phase energy storage converter, control method and control system thereof

A control system, low power consumption technology, applied in the field of circuits, which can solve the problems of inability to achieve battery redundancy and low overall system efficiency

Active Publication Date: 2016-11-09
江苏林洋亿纬储能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] This patent is aimed at the problems that the traditional two-stage bidirectional converter cannot adapt to the relatively large fluctuation range of the battery DC voltage, cannot realize the redundancy of the battery, and has low overall system efficiency. The structure of the phase-to-phase bidirectional converter has been improved,

Method used

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  • Low-power-consumption single-phase energy storage converter, control method and control system thereof
  • Low-power-consumption single-phase energy storage converter, control method and control system thereof

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Effect test

Embodiment 1

[0069] Example 1: Combination figure 1 , A low-power single-phase energy storage converter, which includes an AC / DC conversion module, a DC / DC conversion module and an energy storage body. The single-phase AC is connected to the input end of the AC / DC conversion module and the AC / DC conversion module The output terminal is connected to the input terminal of the DC / DC conversion module, and the output terminal of the DC / DC conversion module is connected to an energy storage body. The energy storage body includes a first energy storage body 111 and a second energy storage body 112 connected in series. The negative terminal of the body 111 is connected to the positive terminal of the second energy storage body 112, wherein:

[0070] The AC / DC conversion module includes a bridge-type fully-controlled rectifier circuit. The bridge-type fully-controlled rectifier circuit is a conventional bridge circuit structure, including a first power switch tube 101, a second power switch tube 102, ...

Embodiment 2

[0073] Embodiment 2: In a low-power single-phase energy storage converter as described in Embodiment 1, the AC / DC conversion module further includes a first filter capacitor 113, and the first filter capacitor 113 is connected to a bridge full The two ends of Vc1 on the DC output side of the controlled rectifier circuit are used to smooth the DC voltage.

Embodiment 3

[0074] Embodiment 3: A low-power single-phase energy storage converter as described in Embodiment 1, the DC / DC conversion module further includes a first filter inductor 109 and a second filter inductor 110, the first energy storage The positive terminal of the body 111 is connected to the fifth power switch tube 105 and the seventh power switch tube 107 through the first filter inductor 109, and the negative terminal of the second energy storage body 112 is connected back to the AC / DC conversion through the second filter inductor 110 The low voltage output terminal of the module; the first filter inductor 109 and the second filter inductor 110 are used to smooth the current waveform and limit the sudden change of the current.

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Abstract

The invention discloses a low-power-consumption single-phase energy storage converter, a control method and a control system thereof. The low-power-consumption single-phase energy storage converter comprises an AC / DC converter module, a DC / DC converter module and an energy storage member. Single-phase AC current is connected with the input end of the AC / DC converter module. The output end of the AC / DC converter module is connected with the input end of the DC / DC converter module. The output end of the DC / DC converter module is connected with the energy storage member. The energy storage member comprises a first energy storage member and the second energy storage member which are connected in series. The cathode end of the first energy storage member is connected with the anode end of the second energy storage member. The invention provides the low-power-consumption single-phase energy storage converter for aiming at single-phase AC current. A unique topological structure which can realize redundancy and serial connection of a battery module is adopted for the DC / DC converter part, thereby reducing limitation to DC voltage fluctuation by the system. Furthermore full-time operation of the power switch of the DC / DC converter module in a high-frequency state is not required, thereby improving system efficiency in a relatively high manner and reducing power loss.

Description

Technical field [0001] The invention relates to the field of circuits, in particular to a low-power single-phase energy storage converter and its control method and control system. Background technique [0002] With economic development, population growth, and the scarcity of fossil energy sources, countries have begun to focus on the development of renewable energy. However, the development of new energy sources such as wind and solar energy are all affected by geographical location, climate and other conditions, resulting in strong intermittentness between wind and solar energy. In order to maximize the use of wind and solar energy, energy storage has become a very reasonable solution. The solution, although various energy storage technologies have their own advantages and disadvantages, with the development of technology, energy storage is expected to become an effective measure to resolve the conflict between energy generation and load. [0003] The existing energy storage tec...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M3/156H02M1/14
CPCH02M1/14H02M3/156H02M7/219H02M1/0048H02M1/007H02M3/1566Y02B70/10
Inventor 曾繁鹏方状志叶曙光钱立军
Owner 江苏林洋亿纬储能科技有限公司
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