Active thermal loading control of the modular multilevel converter by a multi-objective optimization method
The modular multilevel converter (MMC) has become the most attractive converter topology for medium/high-power applications. However, uneven power loss distribution and thermal loading among the semiconductor devices of each submodule (SM) compromise the reliability and lifetime of the converter. In...
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| Vydáno v: | IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society s. 4482 - 4487 |
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01.10.2017
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| Abstract | The modular multilevel converter (MMC) has become the most attractive converter topology for medium/high-power applications. However, uneven power loss distribution and thermal loading among the semiconductor devices of each submodule (SM) compromise the reliability and lifetime of the converter. In this paper, an active thermal loading control method for the MMC is proposed to simultaneously (i) minimize the total semiconductor power loss and (ii) balance the thermal loading of the semiconductor devices within each submodule. In the proposed method, a multi-objective optimization problem is formulated and solved to establish a trade-off between the total power loss and the power loss of the semiconductor devices with the highest thermal loading. Subsequently, the Pareto optimal solutions for circulating currents, output common-mode voltage, and capacitor voltages are explored. Performance and effectiveness of the proposed method are verified by simulation and experimental studies. |
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| AbstractList | The modular multilevel converter (MMC) has become the most attractive converter topology for medium/high-power applications. However, uneven power loss distribution and thermal loading among the semiconductor devices of each submodule (SM) compromise the reliability and lifetime of the converter. In this paper, an active thermal loading control method for the MMC is proposed to simultaneously (i) minimize the total semiconductor power loss and (ii) balance the thermal loading of the semiconductor devices within each submodule. In the proposed method, a multi-objective optimization problem is formulated and solved to establish a trade-off between the total power loss and the power loss of the semiconductor devices with the highest thermal loading. Subsequently, the Pareto optimal solutions for circulating currents, output common-mode voltage, and capacitor voltages are explored. Performance and effectiveness of the proposed method are verified by simulation and experimental studies. |
| Author | Saeedifard, Maryam Qichen Yang |
| Author_xml | – sequence: 1 surname: Qichen Yang fullname: Qichen Yang email: gyang45@gatech.edu organization: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA – sequence: 2 givenname: Maryam surname: Saeedifard fullname: Saeedifard, Maryam email: maryam@ece.gatech.edu organization: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA |
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| Snippet | The modular multilevel converter (MMC) has become the most attractive converter topology for medium/high-power applications. However, uneven power loss... |
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| SubjectTerms | Capacitors Current control Integrated circuits Junctions Modulation Voltage control |
| Title | Active thermal loading control of the modular multilevel converter by a multi-objective optimization method |
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