A dc/dc converter

A technology of converters and reactors, which is applied in the direction of instruments, converting DC power input to DC power output, and adjusting electrical variables, etc., can solve the problems of high-voltage side voltage withstand voltage limitation, unsatisfactory cost and volume, and inability to make high-level products. Achieve the effects of high withstand voltage level, easy expansion, and low equipment cost

Active Publication Date: 2019-03-08
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The patent (CN20140310090.4) applied by Sungrow Power Supply Co., Ltd. relates to a DC-DC converter with high transformation ratio, but its high-voltage side voltage is still limited by the withstand voltage of power electronic devices and cannot be made high
The patent (201180072746.8) proposed by Alstom Technology Co., Ltd. involves a DC-to-DC converter assembly, but its topology requires a large number of modules, including sub-modules and a single semiconductor device, so its topology is complex, The cost and size are not ideal

Method used

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] An embodiment of a DC / DC converter provided by the present invention is as follows figure 1 As shown, specifically:

[0035] The DC / DC converter in this embodiment includes a first bridge arm unit 1 , a second bridge arm unit 2 , a third bridge arm unit 3 , a fourth bridge arm unit 4 , a first reactor 7 and a second reactor 8 . in,

[0036] ①: The first bridge arm unit 1 and the second bridge arm unit 2 are connected to the low-voltage side DC power supply Vin, and the third bridge arm unit 3 and the fourth bridge arm un...

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Abstract

The invention provides a novel DC-DC converter which comprises a first bridge arm unit, a second bridge arm unit, a third bridge arm unit, a fourth bridge arm unit, a first reactor and a second reactor, wherein the first bridge arm unit and the second bridge arm unit access to a low-voltage side dc source, the third bridge arm unit and the fourth bridge arm unit access to a high-voltage side dc source, the first bridge arm unit is connected with the second bridge arm unit in series, the third bridge arm unit is connected with the fourth bridge arm unit in series, the other end of the first bridge arm unit is connected with the other end of the third bridge arm unit through the first reactor, the other end of the second bridge arm unit is connected with the other end of the fourth bridge arm unit through the second reactor, and the connecting ends of the first bridge arm unit and the second bridge arm unit are directly connected with the connecting ends of the third bridge arm unit and the fourth bridge arm unit. Compared with the prior art, the novel DC-DC converter is low in cost, small in space and wide in transformation ratio scope and is suitable for mediate and large power situations.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a DC / DC converter. Background technique [0002] With the gradual application of multi-terminal flexible DC and DC grid technologies based on voltage source converters (VSC), high-voltage DC / DC converters are required to meet DC grid interconnection of different voltage levels and DC parallelism of new energy such as offshore wind power. Network and other high-voltage DC / DC energy interaction occasions. Currently, various types of DC / DC converters are mainly suitable for low-voltage power conversion applications, such as converters with a voltage level range below 1 kV. At present, the DC transmission voltage is usually tens of kV or even hundreds of kV, so the previous low-voltage DC / DC converters are not suitable for high-voltage applications. [0003] The patent (CN20140310090.4) applied by Sungrow Power Supply Co., Ltd. relates to a DC-DC converter with high trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
Inventor 高阳孔德煜魏晓光贺之渊杨兵建于海玉彭玲
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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