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Modular power distribution power electronic transformer

A technology for power electronics and transformers, applied in the field of modularized power electronic transformers for power distribution, can solve the problems of inconvenient modularization, large number of power electronic power devices, complicated control, etc., and achieve easy maintenance, easy expansion, and improved system reliability. Effect

Inactive Publication Date: 2019-02-15
NANNING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this circuit is that it requires a large number of power electronic power devices, it is not easy to realize modularization, and the control is relatively complicated

Method used

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  • Modular power distribution power electronic transformer
  • Modular power distribution power electronic transformer
  • Modular power distribution power electronic transformer

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Embodiment Construction

[0026] The technical solution of the present invention is further described below, but the scope of protection is not limited to the above.

[0027] A modular power electronic transformer for distribution; including at least one set of power units and a three-phase inverter, each set of power units includes three basic power units, corresponding to three-phase alternating current;

[0028] The basic power unit is connected in series with a three-phase line, and the positive and negative poles of the DC output end of the basic power unit are respectively connected with the positive and negative poles of the three-phase inverter.

[0029] The basic power unit includes m AC / DC / AC circuits, an intermediate transformer, and n single-phase rectifier circuits. The output of the m AC / DC / AC circuits is used as the input of the intermediate transformer. The n single-phase rectifier circuits are connected to the two intermediate transformers. The secondary winding is used as the input of the th...

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Abstract

The invention provides a modular power distribution power electronic transformer. The modular power distribution power electronic transformer comprises at least one group of power units and a three-phase inverter, wherein each group of power units comprises three basic power units which are corresponding to three-phase alternating current respectively. According to the circuit topology, the basicfunctions of the original circuit topology are kept, such as electrical isolation, voltage transformation, energy bidirectional flow and the like; due to the modular design, the control is simple, theexpansion is easy, redundant operation can be realized, the reliability is improved, and maintenance is facilitated; and the circuit topology is simplified, the number of needed power devices is reduced, and the decreasing of driving circuits causes improvement of the reliability of the system; and m and n can be selected preferably according to actual application conditions, the design is flexible, and the optimal design target can be obtained.

Description

Technical field [0001] The invention relates to a modularized distribution power electronic transformer. Background technique [0002] Traditional power transformer is a kind of electrical energy conversion equipment based on the principle of electromagnetic induction, which is widely used in power systems to play the role of voltage conversion and electrical isolation. With the development of power electronic technology, power electronic devices have been put into application on a large scale in the power system. Traditional power transformers cannot meet the requirements of the power system, and power electronic transformers have emerged. [0003] Power electronic transformer is a power electronic device composed of power electronic circuit and middle and high frequency intermediate transformer. There are many topological structures of power electronic transformers, and the basic circuit structure is AC / DC / AC+intermediate transformer+AC / DC / AC. The main function of the front-end...

Claims

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Application Information

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IPC IPC(8): H02M5/458
CPCH02M5/458
Inventor 陶兴华
Owner NANNING UNIV
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