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Novel multi-topology DC voltage converter for DC micro-grid

A technology of DC microgrid and DC voltage, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and AC network circuits. Rich bottom-level control experiment environment, safe DC voltage conversion, and space-saving effects

Pending Publication Date: 2021-11-09
商飞信息科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the existing bottom-level open source converters, first of all, most of them are separately divided into single-function devices such as DC boost converters, DC step-down converters, and buck / boost converters. The study of topology is inconvenient and takes up a lot of space in the laboratory
In terms of safety and convenience, a small number of open source devices with two sets of functions have the problems of difficulty in replacement and messy wiring harnesses; in addition, in some devices with bidirectional power flow, the PWM signal simultaneously opens the upper and lower bridges. signal, the user needs to set the dead zone by himself, if it is not set properly, it will cause the power tube to blow up
At the same time, these problems constitute application obstacles for beginners, and are extremely unfavorable for the iteration of scientific research results

Method used

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  • Novel multi-topology DC voltage converter for DC micro-grid
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  • Novel multi-topology DC voltage converter for DC micro-grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Regarding the one-way and two-way control of BOOST, by connecting the No. 2 pin of the first terminal S1 and the No. 4 pin of the third terminal S3, the No. 2 pin of the second terminal S2 and the No. 2 pins, No. 1 pins and No. 2 pins of the fifth connection terminal S5 constitute as figure 2 The BOOST structure connection diagram shown in the figure, the user connects the positive and negative ends of the low-voltage side unidirectional or bidirectional power supply to the No. 1 pin of the first terminal S1 and the No. 1 pin of the second terminal S2 on the power layer 1, respectively. , connect the load on the high-voltage side or the positive and negative ends of the power supply to H+ and H- respectively; at the control layer 4, the user collects I L1 and U H The signal can be adjusted through PWM1, and the user can perform closed-loop control of the output side voltage with sudden changes in the input voltage; through connecting the No. 1 pin and No. 4 pin of the...

Embodiment 2

[0033] Regarding the one-way and two-way control of BUCK, by connecting pin No. 2 of the first terminal S1 and pin No. 4 of the third terminal S3, pin No. 1 and pin 4 of the third terminal S3, The No. 2 pin of the second connecting terminal S2 and the No. 1 pin of the fourth connecting terminal S4, the No. 1 pin and the No. 2 pin of the sixth connecting terminal S6 can be formed as follows image 3 The connection diagram of the BUCK structure shown in the figure, the user connects the positive and negative ends of the low-voltage side load or power supply to the No. 1 pin of the first terminal S1 and the No. 1 pin of the second terminal S2 on the power layer 1, respectively. Connect the positive and negative ends of the unidirectional or bidirectional power supply on the high-voltage side to H+ and H- respectively; at the control layer 4, the user collects the I H and U L The signal can be adjusted through PWM1, and the user can perform closed-loop control of the output side ...

Embodiment 3

[0035] Regarding the one-way and two-way control of BUCK / BOOST, by connecting the No. 2 pin of the first terminal S1 and the No. 1 pin of the third terminal S3, and the No. 1 pin and the No. 4 pin of the third terminal S3 , No. 4 pin of the third connecting terminal S3 and No. 1 pin of the seventh connecting terminal S7 can be constituted as follows Figure 4 The connection diagram of the BUCK structure shown in the figure, the user connects the positive and negative ends of the low-voltage side load or power supply to the No. 1 pin of the first terminal S1 and the No. 1 pin of the second terminal S2 on the power layer 1, respectively. Connect the positive and negative ends of the unidirectional or bidirectional power supply on the high-voltage side to H+ and H- respectively; at the control layer 4, the user collects I H and U L The signal can be adjusted through PWM1, and the user can perform closed-loop control of the output side voltage for sudden changes in the input volt...

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Abstract

A novel multi-topology DC voltage converter for a DC micro-grid comprises a power layer, a transmission layer, a conditioning layer and a control layer. The power layer is connected with the conditioning layer through the transmission layer; the power layer comprises seven wiring terminals, a three-phase two-level IGBT half-bridge power module, a first capacitor and a second capacitor, the pin of the third wiring terminal is connected to one end of the first capacitor and the AC side of the three-phase two-level IGBT half-bridge power module, the pin of the fourth wiring terminal is connected to the three-phase two-level IGBT half-bridge power module and the sixth wiring terminal, the pin of the sixth wiring terminal is connected with the second capacitor, and the pin of the fifth wiring terminal is connected with the three-phase two-level IGBT half-bridge power module and the second capacitor. The defects in the prior art are overcome, the boost control, the buck control, the boost bidirectional conversion, the buck bidirectional conversion and the function conversion of a parallel expansion structure can be realized, and the rapid and safe DC voltage conversion can be realized.

Description

technical field [0001] The invention relates to the technical field of open-source scientific research and testing of DC voltage converters, in particular to a novel multi-topology DC voltage converter for DC microgrids. Background technique [0002] With the advantages of simple control structure and less conversion times, DC microgrid can more efficiently and reliably accept distributed renewable energy generation systems such as wind and light, energy storage units, electric vehicles and other DC loads, while DC voltage conversion As a key component of the DC microgrid, the inverter is widely used in DC photovoltaic grid-connected systems, DC boost control systems, DC step-down control systems, DC energy storage system, high-power DC transmission and other research fields. In these research occasions, researchers not only require the bottom layer to be open source, but more importantly, they hope that the converter can perform one-way and two-way energy flow of step-up a...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02J3/38
CPCH02M3/156H02J3/381H02J2300/26Y02E10/56
Inventor 牛玺童韩非李鹏萱
Owner 商飞信息科技(上海)有限公司
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