Design and Control of a Modular Multilevel HVDC Converter With Redundant Power Modules for Noninterruptible Energy Transfer
This paper presents design and control methods for fault-tolerant operations with redundant converter modules, one of the most prominent features in modular multilevel converter (MMC) topology. In fully implementing MMC functionalities, a nearest level control is applied as a low-switching modulatio...
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| Published in | IEEE transactions on power delivery Vol. 27; no. 3; pp. 1611 - 1619 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
New York, NY
IEEE
01.07.2012
Institute of Electrical and Electronics Engineers |
| Subjects | |
| Online Access | Get full text |
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| Abstract | This paper presents design and control methods for fault-tolerant operations with redundant converter modules, one of the most prominent features in modular multilevel converter (MMC) topology. In fully implementing MMC functionalities, a nearest level control is applied as a low-switching modulation method. A dual sorting algorithm is newly proposed for effectively reducing the switching commutations of each power module as well as for voltage balancing control. Built upon these primary MMC topological and control features, its redundant operation is comprehensively investigated for fail-safe energy transfer. In particular, a novel spare process is proposed to handle an emergency situation when the number of faulty power modules exceeds the module redundancy. Since topological redundancy may cause the switching commutations of power modules in an arm to be unevenly distributed, a practical and effective mitigation measure is incorporated to keep the energy balance while avoiding the undesired switching stresses. Rigorous simulation studies for MMC and its application for high-voltage direct current are performed to demonstrate the validity and effectiveness of the proposed spare process under normal and emergency conditions. |
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| AbstractList | This paper presents design and control methods for fault-tolerant operations with redundant converter modules, one of the most prominent features in modular multilevel converter (MMC) topology. In fully implementing MMC functionalities, a nearest level control is applied as a low-switching modulation method. A dual sorting algorithm is newly proposed for effectively reducing the switching commutations of each power module as well as for voltage balancing control. Built upon these primary MMC topological and control features, its redundant operation is comprehensively investigated for fail-safe energy transfer. In particular, a novel spare process is proposed to handle an emergency situation when the number of faulty power modules exceeds the module redundancy. Since topological redundancy may cause the switching commutations of power modules in an arm to be unevenly distributed, a practical and effective mitigation measure is incorporated to keep the energy balance while avoiding the undesired switching stresses. Rigorous simulation studies for MMC and its application for high-voltage direct current are performed to demonstrate the validity and effectiveness of the proposed spare process under normal and emergency conditions. |
| Author | Jung-Wook Park Kyeon Hur Seung-Taek Baek Gum Tae Son Hee-Jin Lee Tae Sik Nam Uk-Hwa Lee Yong-Ho Chung |
| Author_xml | – sequence: 1 surname: GUM TAE SON fullname: GUM TAE SON organization: School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea, Republic of – sequence: 2 givenname: Hee-Jin surname: LEE fullname: LEE, Hee-Jin organization: School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea, Republic of – sequence: 3 surname: TAE SIK NAM fullname: TAE SIK NAM organization: School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea, Republic of – sequence: 4 givenname: Yong-Ho surname: CHUNG fullname: CHUNG, Yong-Ho organization: LSIS Co. Ltd, Anyang-si, Gyeonggi-do 431-080, Korea, Republic of – sequence: 5 givenname: Uk-Hwa surname: LEE fullname: LEE, Uk-Hwa organization: LSIS Co. Ltd, Anyang-si, Gyeonggi-do 431-080, Korea, Republic of – sequence: 6 givenname: Seung-Taek surname: BAEK fullname: BAEK, Seung-Taek organization: LSIS Co. Ltd, Anyang-si, Gyeonggi-do 431-080, Korea, Republic of – sequence: 7 givenname: Kyeon surname: HUR fullname: HUR, Kyeon organization: School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea, Republic of – sequence: 8 givenname: Jung-Wook surname: PARK fullname: PARK, Jung-Wook organization: School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea, Republic of |
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| Keywords | Performance evaluation HVDC power convertors Power converter spare process Power system stability Voltage control Implementation Fault tolerance redundancy process Direct current Control method Dual sorting algorithm Emergency system Multilevel system Fault tolerant system voltage-source converter-high-voltage direct current (VSC-HVDC) Control system Voltage regulation Power electronics Algorithm Switching Energy balance High voltage High current modular multilevel converter System simulation nearest level control Energy transfer |
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| SubjectTerms | Applied sciences Capacitors Convertors Dual sorting algorithm Electrical engineering. Electrical power engineering Electrical machines Exact sciences and technology HVDC transmission modular multilevel converter Modulation nearest level control Power electronics, power supplies Redundancy redundancy process Regulation and control Sorting spare process Switches Testing. Reliability. Quality control Topology voltage-source converter-high-voltage direct current (VSC-HVDC) |
| Title | Design and Control of a Modular Multilevel HVDC Converter With Redundant Power Modules for Noninterruptible Energy Transfer |
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