Novel DC-DC converter

A converter, a new type of technology, is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables. It can solve problems such as unsatisfactory cost and volume, limited voltage withstand voltage on the high-voltage side, and inability to do high-level problems. The effects of low loss, high withstand voltage level, and low equipment cost

Active Publication Date: 2017-03-22
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
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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] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings 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 novel DC / DC converter provided by the present invention is as follows figure 1 As shown, specifically:

[0035] The new 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 th...

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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 novel 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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