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Bidirectional double-input BUCK/BUCKBOOST dc converter and power distribution method thereof

A DC converter, dual-input technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problems of high cost and complex structure, achieve the effect of small loss, energy feedback, and energy realization

Inactive Publication Date: 2013-11-20
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

[0003] In the traditional new energy joint power supply system, each energy form usually requires a DC / DC converter to convert various energy sources into DC output, and connect them in parallel to the common DC bus to supply DC loads, but its structure is more complicated. and higher cost

Method used

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  • Bidirectional double-input BUCK/BUCKBOOST dc converter and power distribution method thereof
  • Bidirectional double-input BUCK/BUCKBOOST dc converter and power distribution method thereof
  • Bidirectional double-input BUCK/BUCKBOOST dc converter and power distribution method thereof

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0029] Such as figure 1 As shown, a bidirectional double-input BUCK / BUCKBOOST DC converter of the present invention includes a BUCK pulse voltage source unit, a BUCKBOOST pulse current source unit and an output filter circuit;

[0030] The BUCK pulse voltage source unit includes a first input DC voltage source A (hereinafter referred to as power source A), a first power switch tube M 1 , the second power switch tube M 3 , the positive pole of the power supply A and the first power switch tube M 1 The drain connection of the first power switch tube M 1 The source and the second power switch tube M 3 The drain connection of the second power switch tube M 3 The source of is connected to the negative pole of power supply A;

[0031] The BUCKBOOST pulse current source unit includes a second input DC voltage source B (hereinafter referred to as ...

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Abstract

The invention discloses a bidirectional double-input BUCK / BUCKBOOST dc converter and a power distribution method thereof. The dc converter is composed of a BUCK pulse voltage source, a BUCKBOOST pulse current source and an output filter circuit, wherein the BUCK pulse voltage source comprises a power supply and a half-bridge switch block, the BUCKBOOST pulse current source comprises a power supply, a power switch tube and an inductor, and after the BUCK pulse voltage source is embedded into the BUCKBOOST pulse current source, a load is supplied via a filter C. The power distribution method comprises power distribution and load feedback power control is carried out on two input sources, wherein when the required power of the load is greater than the power provided by the power source A, the power source B is discharged; and when the required power of the load is lower than the power provided by the power source A, the power source B is charged. The dc converter and the power distribution method of the invention are characterized by capability of stepping voltage up / down, inversion of output polarity, large adjusting range of output voltage, energy feedback, low loss and high circuit efficiency, etc.

Description

technical field [0001] The invention relates to the field of power electronic converters, in particular to a bidirectional double-input BUCK / BUCKBOOST DC converter and a power distribution method thereof. Background technique [0002] With the increasingly prominent environmental protection issues, people pay more and more attention to the development and utilization of renewable energy. Renewable energy has the characteristics of cheap, reliable, clean and pollution-free, and abundant energy, so renewable energy power generation has shown a good market prospect. At present, the most widely used forms of renewable energy power generation include photovoltaic power generation, fuel cell power supply, wind power generation, hydropower generation, geothermal power generation, etc., but all have the characteristics of unstable power supply, discontinuity, and changes with climatic conditions. Therefore, it is necessary to A distributed power supply system that uses multiple ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10H02J7/35
Inventor 孙孝峰周悦刘飞龙李昕李伟松
Owner YANSHAN UNIV
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