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Hybrid power module type direct-current transformer

A technology of DC transformer and hybrid power, which is applied in the direction of conversion of DC power input to DC power output, conversion of irreversible DC power input to AC power output, and output power conversion device, which can solve the problem of increasing system operating costs and high cost. question

Inactive Publication Date: 2019-06-07
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in order to improve the power transmission efficiency of the system, this type of converter can use SiC-type MOSFET devices to reduce system switching losses. However, compared with traditional Si-type IGBT devices, the cost of this device is relatively high, which greatly increases the operating cost of the system.

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  • Hybrid power module type direct-current transformer
  • Hybrid power module type direct-current transformer
  • Hybrid power module type direct-current transformer

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Hybrid power module type DC transformer of the present invention such as figure 1 shown. The hybrid power module type DC transformer contains two types of power modules inside. The two types of power modules are connected in cascade at the first DC port and connected in parallel at the second DC port.

[0030] The first type of power module is composed of N phase-shifting dual active bridge converters, and the range of N is 10-15. Each phase-shifting dual active bridge converter high voltage side energy storage capacitor C H1 The positive terminal a of is connected to the adjacent phase-shifting dual active bridge converter phase-shifting dual active bridge converter C H1 The negative terminal b of each phase-shifting dual active bridge converter phase-shifting dual active bridge converter high voltage side energy storage capacitor C ...

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Abstract

Disclosed is a hybrid power module type direct-current transformer. The hybrid power module type direct-current transformer comprises a phase-shifting type double-active-bridge converter, based on a SiC MOSFET switching device, of a first type power module, and a series resonance type double-active-bridge converter, based on a Si IGBT switch device, of a second power module. In a continuous control period, the first type power module adopts a voltage closed loop and phase shifting control mode; and the second type power module adopts a voltage output control mode, wherein the duty ratio of theopen loop is 50% square waves. Compared with a traditional direct-current transformer circuit topology of a phase-shifting type double-active-bridge converter power module based on the Si-IGBT switchdevice, the hybrid power module type direct-current transformer can effectively improve the system electric energy transmission efficiency.

Description

technical field [0001] The invention relates to a hybrid power module type DC transformer. Background technique [0002] At present, in the existing distribution network, the AC form is used for power transmission. In recent years, consumer electronics such as computers, mobile phones, and tablets, DC loads such as LEDs, data centers, and electric vehicles, and distributed renewable energy sources such as photovoltaics, wind energy, and solar energy have become more and more important in power distribution systems. , through the construction of a DC distribution network, the energy interaction between renewable energy and DC loads can be directly realized, thereby saving a large number of power conversion links, reducing costs, reducing losses, and improving power transmission efficiency. In addition, compared with the traditional AC distribution network, the DC distribution network has the advantages of larger power supply capacity, longer power supply radius, less promine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/48
CPCY02B70/10
Inventor 张航李子欣张宸宇王平赵聪高范强李耀华
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI