DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor

DC transformer is the key equipment to interconnect the high voltage dc systems with different voltage levels and build dc grid. Compared with the dc/ac/dc converter based on modular multilevel converter, the non-isolated modular dc/dc converter (MDCC) offers lower cost and higher efficiency, due to...

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Autores principales:	Hongcheng You, Xu Cai, Liangzhong Yao, Yuanzhi Cao, Zhibing Wang
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2018
Materias:	DC/dc power conversion high voltage direct current (HVDC) transmission modular multilevel converter (MMC) dc grid Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/ec15dfe9a8ef48c4ba60260ef5fc36f6
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spelling	oai:doaj.org-article:ec15dfe9a8ef48c4ba60260ef5fc36f62021-11-19T00:02:01ZDC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor2169-353610.1109/ACCESS.2018.2878683https://doaj.org/article/ec15dfe9a8ef48c4ba60260ef5fc36f62018-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/8528303/https://doaj.org/toc/2169-3536DC transformer is the key equipment to interconnect the high voltage dc systems with different voltage levels and build dc grid. Compared with the dc/ac/dc converter based on modular multilevel converter, the non-isolated modular dc/dc converter (MDCC) offers lower cost and higher efficiency, due to the elimination of the ac transformer and reduced submodules (SMs). However, the MDCC based on the half bridge SM (HBSM) can not block the dc short fault. Therefore, the MDCC with the hybrid configuration of the unipolar full-bridge SM (UFBSM) and HBSM, which achieves the dc fault blocking capability, is analysed in this paper, and a damping resistor is introduced in the UFBSM to reduce the ascending voltage of the SM capacitor under dc fault. The fault blocking mechanism of the converter is described, and the fast recovery strategy is presented to ride through the temporary fault. In addition, the design principle of the converter is discussed through a study case. Finally, the simulation performed in Matlab/Simulink verifies the theoretical analysis.Hongcheng YouXu CaiLiangzhong YaoYuanzhi CaoZhibing WangIEEEarticleDC/dc power conversionhigh voltage direct current (HVDC) transmissionmodular multilevel converter (MMC)dc gridElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 6, Pp 67625-67636 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	DC/dc power conversion high voltage direct current (HVDC) transmission modular multilevel converter (MMC) dc grid Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	DC/dc power conversion high voltage direct current (HVDC) transmission modular multilevel converter (MMC) dc grid Electrical engineering. Electronics. Nuclear engineering TK1-9971 Hongcheng You Xu Cai Liangzhong Yao Yuanzhi Cao Zhibing Wang DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor
description	DC transformer is the key equipment to interconnect the high voltage dc systems with different voltage levels and build dc grid. Compared with the dc/ac/dc converter based on modular multilevel converter, the non-isolated modular dc/dc converter (MDCC) offers lower cost and higher efficiency, due to the elimination of the ac transformer and reduced submodules (SMs). However, the MDCC based on the half bridge SM (HBSM) can not block the dc short fault. Therefore, the MDCC with the hybrid configuration of the unipolar full-bridge SM (UFBSM) and HBSM, which achieves the dc fault blocking capability, is analysed in this paper, and a damping resistor is introduced in the UFBSM to reduce the ascending voltage of the SM capacitor under dc fault. The fault blocking mechanism of the converter is described, and the fast recovery strategy is presented to ride through the temporary fault. In addition, the design principle of the converter is discussed through a study case. Finally, the simulation performed in Matlab/Simulink verifies the theoretical analysis.
format	article
author	Hongcheng You Xu Cai Liangzhong Yao Yuanzhi Cao Zhibing Wang
author_facet	Hongcheng You Xu Cai Liangzhong Yao Yuanzhi Cao Zhibing Wang
author_sort	Hongcheng You
title	DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor
title_short	DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor
title_full	DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor
title_fullStr	DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor
title_full_unstemmed	DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor
title_sort	dc fault analysis of modular dc/dc converter employing a new submodule with damping-resistor
publisher	IEEE
publishDate	2018
url	https://doaj.org/article/ec15dfe9a8ef48c4ba60260ef5fc36f6
work_keys_str_mv	AT hongchengyou dcfaultanalysisofmodulardcdcconverteremployinganewsubmodulewithdampingresistor AT xucai dcfaultanalysisofmodulardcdcconverteremployinganewsubmodulewithdampingresistor AT liangzhongyao dcfaultanalysisofmodulardcdcconverteremployinganewsubmodulewithdampingresistor AT yuanzhicao dcfaultanalysisofmodulardcdcconverteremployinganewsubmodulewithdampingresistor AT zhibingwang dcfaultanalysisofmodulardcdcconverteremployinganewsubmodulewithdampingresistor
_version_	1718420703331483648

DC Fault Analysis of Modular DC/DC Converter Employing a New Submodule With Damping-Resistor

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