Energy-balancing Control Strategy for Modular Multilevel Converters Under Submodule Fault Conditions
The modular multilevel converter (MMC) is a newly introduced switch-mode converter topology with the potential for high-voltage and high-power applications. This paper focuses on the design and control methods for fault-tolerant operation using redundant submodules (SMs), which is one of the most im...
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| Published in | IEEE transactions on power electronics Vol. 29; no. 9; pp. 5021 - 5030 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
New York, NY
IEEE
01.09.2014
Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subjects | |
| Online Access | Get full text |
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| Abstract | The modular multilevel converter (MMC) is a newly introduced switch-mode converter topology with the potential for high-voltage and high-power applications. This paper focuses on the design and control methods for fault-tolerant operation using redundant submodules (SMs), which is one of the most important features in the MMC topology. By comparing three design schemes of redundant SMs, the most economic and reliable scheme is identified. In addition, a mathematical model of the MMC with arms containing different numbers of SMs is developed. Based on the identified scheme and mathematical model, an energy-balancing control strategy is proposed to keep the MMC operating normally under SM fault conditions. Finally, time-domain simulations of a 61-level MMC system are performed, using the PSCAD/EMTDC software, while experiments are carried out on a 41-level MMC prototype. The simulation and experimental results validate the design scheme, mathematical model, and proposed energy-balancing control strategy. |
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| AbstractList | The modular multilevel converter (MMC) is a newly introduced switch-mode converter topology with the potential for high-voltage and high-power applications. This paper focuses on the design and control methods for fault-tolerant operation using redundant submodules (SMs), which is one of the most important features in the MMC topology. By comparing three design schemes of redundant SMs, the most economic and reliable scheme is identified. In addition, a mathematical model of the MMC with arms containing different numbers of SMs is developed. Based on the identified scheme and mathematical model, an energy-balancing control strategy is proposed to keep the MMC operating normally under SM fault conditions. Finally, time-domain simulations of a 61-level MMC system are performed, using the PSCAD/EMTDC software, while experiments are carried out on a 41-level MMC prototype. The simulation and experimental results validate the design scheme, mathematical model, and proposed energy-balancing control strategy. The modular multilevel converter (MMC) is a newly introduced switch-mode converter topology with the potential for high-voltage and high-power applications. This paper focuses on the design and control methods for fault-tolerant operation using redundant submodules (SMs), which is one of the most important features in the MMC topology. By comparing three design schemes of redundant SMs, the most economic and reliable scheme is identified. In addition, a mathematical model of the MMC with arms containing different numbers of SMs is developed. Based on the identified scheme and mathematical model, an energy-balancing control strategy is proposed to keep the MMC operating normally under SM fault conditions. Finally, time-domain simulations of a 61-level MMC system are performed, using the PSCAD/EMTDC software, while experiments are carried out on a 41-level MMC prototype. The simulation and experimental results validate the design scheme, mathematical model, and proposed energy-balancing control strategy. [PUBLICATION ABSTRACT] |
| Author | Yuebin Zhou Zhiyong Lin Pengfei Hu Daozhuo Jiang Yiqiao Liang Jie Guo |
| Author_xml | – sequence: 1 givenname: Pengfei surname: Hu fullname: Hu, Pengfei – sequence: 2 givenname: Daozhuo surname: Jiang fullname: Jiang, Daozhuo – sequence: 3 givenname: Yuebin surname: Zhou fullname: Zhou, Yuebin – sequence: 4 givenname: Yiqiao surname: Liang fullname: Liang, Yiqiao – sequence: 5 givenname: Jie surname: Guo fullname: Guo, Jie – sequence: 6 givenname: Zhiyong surname: Lin fullname: Lin, Zhiyong |
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| Keywords | Power converter Balancing Prototype Control system redundant submodules (SMs) Power electronics Switching convertors Topology Experimental study submodule (SM) fault Fault tolerance High power Time domain method High voltage Energy-balancing control strategy System simulation modular multilevel converters (MMCs) Software Control method Mathematical model Multilevel system Fault tolerant system Message transmission |
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| SubjectTerms | Applied sciences Capacitors Circuit properties Control systems Converters Convertors Design engineering Electric, optical and optoelectronic circuits Electrical engineering. Electrical power engineering Electrical equipment Electrical machines Electronic circuits Electronics Energy-balancing control strategy Equations Exact sciences and technology Fault diagnosis Faults Inductance Mathematical model Mathematical models Metal matrix composites Modular modular multilevel converters (MMCs) Multilevel Power electronics, power supplies prototype Prototypes redundant submodules (SMs) Regulation and control Signal convertors Strategy submodule (SM) fault Switches Topology Voltage control |
| Title | Energy-balancing Control Strategy for Modular Multilevel Converters Under Submodule Fault Conditions |
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