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Three-input-isolation DC/DC converter

A converter and three-input technology, which is applied in the direction of conversion of DC power input to DC power output, conversion of AC power input to DC power output, output power conversion device, etc., can solve the problem of increasing the total system volume and installation cost, increasing the distribution Control complexity of conventional power generation system, reduce the utilization rate of renewable energy, etc., to achieve the effect of reducing control complexity, light weight, and low loss

Inactive Publication Date: 2014-10-08
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

These two control methods are also based on the control methods of traditional distributed systems, and they control different power sources in the network separately. Complexity, reducing utilization of renewable energy

Method used

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Examples

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] A three-input isolated DC / DC converter, such as figure 2 As shown, including the pre-stage inverter circuit, transformer and post-stage rectification circuit;

[0025] The pre-stage inverter circuit includes:

[0026] By the first power switch tube S 11 , the second power switch tube S 13 , the third power switch tube S 2 and the fourth power switch S 4 The voltage source type full-bridge inverter circuit composed of the first power switch tube S 11 The drain and the second power switch S 13 The drain is connected to the positive pole of the first DC input power supply, the first power switch tube S 11 The source is connected to the third power switch S2 The drain of the second power switch S 13 The source is connected to the fourth power switch S 4 The drain of the third power switch tube S 2 and the fourth power switch S 4 t...

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Abstract

The invention discloses a three-input-isolation DC / DC converter which includes a former stage inversion circuit, a transformer and a backward stage rectifying circuit. The former-stage inversion circuit and the backward stage rectifying circuit are coupled together through the transformer so that input and output electrical isolation is realized. The three-input-isolation DC / DC converter is capable of realizing bidirectional flowing of energy and saving electric energy so that modularization is easy to realize and application is easy to expand. The three-input-isolation DC / DC converter connects different power generation units in a DC distributed power generation system through an integrated interface current transformer so that control of the DC distributed power generation system is converted to control of the single interface current transformer and thus control complexity of the DC distributed power generation system is reduced significantly and power density of the system is improved.

Description

technical field [0001] The present invention relates to power electronic interface technology, in particular to a three-input isolated DC / DC converter that can be used in a DC distributed power generation system, which can integrate various forms of renewable energy and traditional energy through an interface converter Together, the control of the DC distributed generation system is transferred to the control of the converter, which greatly simplifies the control of the DC microgrid. Background technique [0002] The distributed power generation system converts different energy forms into electric energy and utilizes it. It is an effective way to utilize distributed energy. It generally refers to a small distributed power generation with a power generation of several thousand watts to 50MW, distributed, and installed near the user. A power system composed of a distributed generator (DG) to supply power to users. And since most forms of power in the distributed power generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/5387H02M7/217H02J7/35
Inventor 孙孝峰熊亮亮李昕
Owner YANSHAN UNIV
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