A resonant power electronic converter and converter device

Abstract

The invention relates to the technical field of power electronic converters, and aims to provide a resonant power electronic converter and a converter device. The converter includes an input-stage rectifier circuit and a subsequent DC / DC circuit. The input-stage rectifier circuit includes three bridge arms, and each bridge arm is composed of upper and lower half-bridge arms. The midpoints of each bridge arm are respectively connected to The three-phase connection of the high-voltage AC power grid; each half bridge arm includes n module units, and the ports of each module unit are connected end to end to form a bridge arm structure. The high-frequency isolation of the input and output sides of the present invention eliminates the bulky low-frequency transformer, and realizes high-efficiency energy transmission and intelligent control at the same time. It can block the harmonic transfer between different power grids and the mutual influence of faults. At the same time, the output voltage range is very wide, and the continuous adjustment of current and voltage can be realized. Moreover, the collection of operating information of the converter system is simple and convenient. Multiple converter systems They can communicate with each other to realize smart grid.

Description

technical field

[0001] The invention relates to the technical field of power electronic converters, in particular to a power electronic converter system capable of realizing high efficiency, high-frequency isolation, high-voltage input, wide-range stable voltage output, and bidirectional energy flow. Background technique

[0002] With the increasingly serious ecological environment problems and the depletion of traditional energy sources, energy-saving technologies and efficient use of new energy sources are receiving attention and support from all over the world. Undoubtedly, as an important application aspect of energy-saving technology, smart grid has become a research hotspot in industry and academia. Distributed power generation is an important way to utilize new energy. The combination of distributed power generation and smart grid has become an inevitable trend of the future grid.

[0003] The traditional new energy distributed power generation system realizes the e...

Examples

Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] First of all, explain: the "high frequency" mentioned in the present invention refers to several kilohertz to tens of kilohertz; the "high voltage" mentioned refers to tens of kilovolts to hundreds of kilovolts, or even higher. The circuit or component using this qualifier in the name refers to the circuit or component that can realize the corresponding function or be used in the corresponding environment. This concept belongs to the basic concept of this field, which is well known to those skilled in the art, so the present invention will not repeat it.

[0047] refer to figure 1 , the entire converter system includes a two-stage structure of input stage and isolation stage, in which the front stage is a three-phase rectification (inversion) circuit, and the latter stage is a resonant DC / DC circuit with high-frequency isolation that ca...

technical field

[0001] The invention relates to the technical field of power electronic converters, in particular to a power electronic converter system capable of realizing high efficiency, high-frequency isolation, high-voltage input, wide-range stable voltage output, and bidirectional energy flow. Background technique

[0002] With the increasingly serious ecological environment problems and the depletion of traditional energy sources, energy-saving technologies and efficient use of new energy sources are receiving attention and support from all over the world. Undoubtedly, as an important application aspect of energy-saving technology, smart grid has become a research hotspot in industry and academia. Distributed power generation is an important way to utilize new energy. The combination of distributed power generation and smart grid has become an inevitable trend of the future grid.

[0003] The traditional new energy distributed power generation system realizes the e...

Examples

Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] First of all, explain: the "high frequency" mentioned in the present invention refers to several kilohertz to tens of kilohertz; the "high voltage" mentioned refers to tens of kilovolts to hundreds of kilovolts, or even higher. The circuit or component using this qualifier in the name refers to the circuit or component that can realize the corresponding function or be used in the corresponding environment. This concept belongs to the basic concept of this field, which is well known to those skilled in the art, so the present invention will not repeat it.

[0047] refer to figure 1 , the entire converter system includes a two-stage structure of input stage and isolation stage, in which the front stage is a three-phase rectification (inversion) circuit, and the latter stage is a resonant DC / DC circuit with high-frequency isolation that ca...

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