Power conversion device and power supply system
A power conversion device and power technology, applied in the direction of output power conversion device, conversion of DC power input to DC power output, conversion of AC power input to DC power output, etc., can solve the problems of high system complexity, low work efficiency, and cost Increase and other issues
Active Publication Date: 2022-06-28
DELTA ELECTRONICS (SHANGHAI) CO LTD
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- Application Information
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Problems solved by technology
[0005] However, in the existing low-voltage DC power supply system architecture, due to the need to add a DC / DC converter, there are problems of low work efficiency, high system complexity and increased cost
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[0036] In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.
[0037] In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include one or more ...
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The present application provides a power conversion device and a power supply system. The power conversion device includes: a star / delta switching unit, a first power conversion unit, a second power conversion unit, a third power conversion unit, and a controller; the first power conversion The AC terminals of the unit, the second power conversion unit, and the third power conversion unit are connected to the three-phase AC terminals through the star / delta switching unit, and the DC terminals of the first power conversion unit, the second power conversion unit, and the third power conversion unit are connected to the DC terminals. The power supply terminal is connected; wherein, the controller is used to control the star / delta switching unit according to the signal reflecting the voltage of the DC power supply terminal, and the star / delta switching unit is used to form the three-phase AC terminal and the first power conversion unit, the second power conversion unit and the second power conversion unit. The star connection or delta connection between the three power conversion units realizes a wide range of DC voltage output.
Description
technical field [0001] The present application relates to electronic technology, and in particular, to a power conversion device and a power supply system. Background technique [0002] With the advancement of distributed power generation technology and the increasing number of DC power equipment, the demand for low-voltage DC power distribution is increasing. The traditional low-voltage DC power distribution system adopts the low-voltage DC power distribution method of power frequency isolation transformer, which has high transmission costs. , large losses, high light load losses, and large volume and weight have become one of the bottlenecks in realizing high power density and high efficiency smart grids. [0003] In the prior art, the traditional power frequency isolation transformer is replaced by a high-frequency isolation power electronic transformer (Power Electronic Transformer, PET for short). The existing PET usually uses two-stage converters. The first stage uses...
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IPC IPC(8): H02M7/219H02M3/335H02J3/00
CPCH02M7/219H02M3/33576H02J3/00H02M1/0077H02M1/007H02M3/01H02M3/33569H02M1/0048Y02B70/10H02M1/10H02M7/2176
Inventor 陆城陶勇胡文斐
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD