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
CN106533162BActive Publication Date: 2019-03-08GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
Publication Date
2019-03-08

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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.
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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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