Journal of Applied Science and Engineering

Published by Tamkang University Press


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Baoge Zhang This email address is being protected from spambots. You need JavaScript enabled to view it.1, Rui Sun1, Zhen Zhang1, Yao Rong1, and Yuemin Jiao1

1School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China


Received: July 29, 2021
Accepted: October 2, 2021
Publication Date: November 1, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Due to the continuous maturity of flexible DC transmission technology, DC transmission has become more popular. As a key part of the DC power network, the importance of high-voltage DC circuit breaker (DCCB) is self-evident. For the existing problems in DCCB, such as the large number of inputs leading to high cost, excessive current during short-circuit faults, and excessive energy absorption by surge arresters, a new current limiting multi-port high-voltage DC circuit breaker topology (MP-DCCB) is proposed. By the process of improving the DCCB topology structure, carrying out theoretical analysis of the current limiting and breaking processes of the new MP-DCCB, offering the relevant parameters of the device and the selection basis, the corresponding simulation model made by PSCAD software is finally constructed. Comparing the simulation results with the existing DCCB scheme, the new MP-DCCB has the advantages of suppressing the magnitude of fault current, reducing the energy consumed by the surge arrester, and shortening the shutdown time of the surge arrester and shut down the current. Therefore, the new MP-DCCB has good reliability and economy, and the simulation results verify that the proposed scheme topology can be applied to the current DC power network.

Keywords: DC network, multi-port high-voltage DC circuit breaker, current-limiting branch cir-cuit, grounding branch circuit, short-circuit fault, surge arrester


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