Active bridge complex power determination method and device of multi-port isolation type direct-current converter

A DC converter, isolated technology, used in electrical devices, measuring devices, measuring electrical power and other directions, can solve the converter's active bridge and resonant unit structure change, complex multi-winding magnetic circuit relationship, converter topology Coupling and other issues

Pending Publication Date: 2020-09-29
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex relationship between the multi-winding magnetic circuit of MBIDC and the changeable structure of the active bridge and resonant unit of the converter, a series of problems such as topological coupling of the converter have been caused. Therefore, an equivalent model of MBIDC is established to analyze the multi-port isolated DC conversion. The complex power of the active bridge of the device has become a key problem to be solved urgently

Method used

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  • Active bridge complex power determination method and device of multi-port isolation type direct-current converter
  • Active bridge complex power determination method and device of multi-port isolation type direct-current converter
  • Active bridge complex power determination method and device of multi-port isolation type direct-current converter

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Embodiment 1

[0050] The embodiment of the present invention proposes a method for determining the complex power of the active bridge of the multi-port isolated DC converter. The flow chart is as follows figure 1 shown, including:

[0051] Determine the active bridge AC side current excitation corresponding to the port of the shared magnetic core according to the frequency domain phasor of the active bridge AC side voltage excitation source corresponding to the port of the shared magnetic core and the winding coupling equivalent inductance of the shared magnetic core source;

[0052] The active bridge complex power of the multi-port isolated DC converter is determined by using the active bridge AC side current excitation source corresponding to the port of the shared magnetic core.

[0053] The multi-port isolated DC converter includes a multi-winding shared magnetic core and a resonant unit and an active bridge corresponding to the ports of the shared magnetic core. Its structure is as fo...

Embodiment 2

[0067] The embodiment of the present invention proposes an active bridge complex power determination device for a multi-port isolated DC converter, and its structure diagram is as follows Figure 4 shown, including:

[0068] The first determining module is used to determine the corresponding frequency of the port of the shared magnetic core according to the frequency domain phasor of the active bridge AC side voltage excitation source corresponding to the port of the shared magnetic core and the winding coupling equivalent inductance of the shared magnetic core. Active bridge AC side current excitation source;

[0069] The second determining module is configured to determine the active bridge complex power of the multi-port isolated DC converter by using the active bridge AC side current excitation source corresponding to the port of the shared magnetic core.

[0070] The multi-port isolated DC converter includes a shared magnetic core and a resonant unit and an active bridge...

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Abstract

The invention relates to an active bridge complex power determination method and device of a multi-port isolation type direct current converter. The method comprises the following steps: determining an active bridge alternating current side current excitation source corresponding to a port of a common magnetic core according to a frequency domain phasor of the active bridge alternating current side voltage excitation source corresponding to the port of the common magnetic core and a winding coupling equivalent inductance of the common magnetic core; and determining active bridge complex powerof the multi-port isolation type direct current converter by utilizing the active bridge alternating current side current excitation source corresponding to the port of the common magnetic core. According to the technical scheme provided by the invention, active bridge topological structure commonality, a resonance unit type and a multi-winding magnetic circuit coupling relationship of the multi-port isolation type direct current converter are analyzed; and an active bridge complex power analysis method of the multi-port isolation type direct-current converter is provided and lays a solid foundation for optimizing energy transmission and distribution control of the multi-port isolation type direct-current converter and improving efficiency and power density.

Description

technical field [0001] The invention relates to the technical field of AC and DC hybrid power distribution, in particular to a method and device for determining active bridge complex power of a multi-port isolated DC converter. Background technique [0002] With larger-scale power distribution requirements and more types of "source" and "load" elements connected, the complexity of the distribution network has increased sharply, the interaction between devices has become more frequent and intense, and the multi-directional power flow has become more obvious. , and a series of issues such as stricter requirements for electrical isolation and protection. The AC-DC hybrid power distribution system built with the energy router as the hub realizes functions such as distributed power supply, plug-and-play flexible load, AC-DC power customization, and active power flow control. [0003] In this context, the Multiport Bidirectional Isolated DC / DC Converter (MBIDC) emerged as the tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/00
CPCG01R21/00
Inventor 沙广林段青盛万兴马春艳赵彩虹谭璐洪君田昕
Owner CHINA ELECTRIC POWER RES INST
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