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Multi-functional intelligent bidirectional current converter

A bidirectional converter, multi-functional technology, applied in the direction of converting AC power input to DC power output, output power conversion device, electrical components, etc., can solve the difficulty of power improvement, and the step-up ratio of power frequency bidirectional converters is large and other problems, to achieve the effect of simple and reliable control, easy power frequency isolation, and improved boost ratio

Active Publication Date: 2016-12-14
江苏耐思特新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The problem to be solved by the present invention is to provide a multifunctional intelligent bidirectional converter that can meet the demands of 110Vac and 220Vac power grids and loads simultaneously, and at the same time solve the problem that the power frequency bidirectional converter is too large in the low-voltage energy storage system. Raise the more difficult questions

Method used

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Effect test

Embodiment 1

[0039] Such as Figure 5 As shown, the isolated energy storage unit includes a first isolation transformer 151, a first output capacitor 152, a second isolation transformer 153 and a second output capacitor 154, the first isolation transformer 151 is connected to the first filter unit 13, and the first output capacitor 152 is connected to the two output terminals of the secondary side of the first isolation transformer 151, the second isolation transformer 153 is connected to the second filter unit 14, and the second output capacitor 154 is connected to the two output terminals of the secondary side of the second isolation transformer 153 connection, the first output capacitor 152 and the second output capacitor 154 are both connected to the load output port 16 , and both the first output capacitor 152 and the second output capacitor 154 are connected to the grid interface unit 17 .

[0040] The DC input unit 10 can be a photovoltaic input or a storage battery input. The stora...

Embodiment 2

[0044] Such as Figure 10 As shown, the isolated energy storage unit includes a third isolation transformer 155 and a third output capacitor 156, one primary side input terminal of the third isolation transformer 155 is connected with the first filter unit 13, and the other primary side of the third isolation transformer 155 The input end is connected with the second filter unit 14, the third output capacitor 156 is connected with the two output ends of the secondary side of the third isolation transformer 155, the third output capacitor 156 is connected with the load output port 16, and the third output capacitor 156 It is connected with the grid interface unit 17.

[0045] in, Figure 10 and Figure 5 The difference is that the output of the two independent first power conversion unit 11 and the second power conversion unit 12 have a 180° chopping waveform that is connected in series after passing through the first filtering unit 13 and the second filtering unit 14. conne...

Embodiment 3

[0049] Such as Figure 15 As shown, the multifunctional intelligent bidirectional converter also includes a third power conversion unit 18, a third filter unit 19, and the isolated energy storage unit includes a fourth isolation transformer 157, a fourth output capacitor 158, a fifth isolation transformer 159, and a fifth isolation transformer 159. The output capacitor 1510, the sixth isolation transformer 1511 and the sixth output capacitor 1512, the third power conversion unit 18 is connected to the DC input unit 10, the third filter unit 19 is connected to the third power conversion unit 18, and the fourth isolation transformer 157 It is connected with the first filter unit 13, the fourth output capacitor 158 is connected with the two output terminals of the secondary side of the fourth isolation transformer 157, the fifth isolation transformer 159 is connected with the second filter unit 14, and the fifth output capacitor 1510 is connected with the second filter unit 14. T...

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Abstract

The invention relates to the field of an electronic circuit, in particular to a multi-functional intelligent bidirectional current converter. The multi-functional intelligent bidirectional current converter comprises a DC input unit, a first power conversion unit, a second power conversion unit, a first filter unit, a second filter unit, an isolation energy storage unit, a load output port and a power grid interface unit, wherein the isolation energy storage unit is used for electrical isolation, voltage adjustment and output energy storage, the first filter unit and the second filter unit are both connected with the isolation energy storage unit, and the load output port and the power grid interface unit are both connected with the isolation energy storage unit. By the multi-functional intelligent bidirectional current converter, the demands of a 110Vac power grid, a 220Vac power grid and a load can be simultaneously satisfied, and meanwhile, the problems that the step-up ratio of power frequency bidirectional current converter is excessively large in a low-voltage energy storage system and the power is difficult to improve are solved.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a multifunctional intelligent bidirectional converter. Background technique [0002] The bidirectional converter is the core energy conversion unit in the energy storage system. The traditional topology of the bidirectional converter for energy storage mainly includes a power frequency isolation structure and a high frequency isolation structure, such as figure 1 As shown, it is mainly composed of a DC input unit 1, a power conversion unit 2, a filter unit 3, an isolation transformer 4, an output capacitor 5, a grid interface unit 6, and a load interface unit 7; the DC input unit 1 includes a photovoltaic panel The input interface also includes the energy storage battery input interface and the sampling circuit. The power commutation unit 2 is composed of four switching transistors, and its main function is to perform DC-AC bidirectional commutation. The DC input unit 1 transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M7/5395
CPCH02M7/53873H02M7/5395
Inventor 郑俊涛苏岩罗霆黄建亮
Owner 江苏耐思特新能源科技有限公司
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