The Experts below are selected from a list of 9114 Experts worldwide ranked by ideXlab platform
Dianguo Xu - One of the best experts on this subject based on the ideXlab platform.
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capacitance reduction of the hybrid modular multilevel converter by decreasing average capacitor voltage in variable speed drives
IEEE Transactions on Power Electronics, 2019Co-Authors: Shaoze Zhou, Binbin Li, Mingxu Guan, Xinyi Zhang, Zigao Xu, Dianguo XuAbstract:Modular multilevel converters (MMCs) represent an Emerging Topology in medium-voltage (MV) and high-voltage applications. But for MV variable-speed motor drives, the MMC faces the challenge of large capacitor voltage ripple at low speeds. Delightfully, a hybrid MMC (HMMC) has proved to be potential in MV motor drives, since this Topology has a lower capacitor voltage ripple and does not introduce any common voltage to the motor. This paper proposed a method to decrease the average capacitor voltage of the HMMC, which can effectively drive the motor at very low speeds without significantly increasing the submodule (SM) capacitance. Moreover, the selection of average capacitor voltage and the dimension of the SM capacitance are presented. Simulation and experimental results verify the effectiveness of the proposed method.
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An Improved Circulating Current Injection Method for Modular Multilevel Converters in Variable-Speed Drives
IEEE Transactions on Industrial Electronics, 2016Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Shaoze Zhou, Dianguo Xu, Concettina Buccella, Carlo CecatiAbstract:Modular multilevel converters (MMC) represent an interesting and Emerging Topology in medium-voltage motor drive applications. The main challenge of using such a Topology in variable-speed drives is the large voltage ripple of submodule capacitors at low speed with constant torque. In this paper, an improved circulating current injection method is proposed, which does not completely eliminate the capacitor voltage ripple, but maintains it bounded within reasonable values. As a result, magnitude of injected circulating current is reduced, leading to converter efficiency improvement and reduction of semiconductor current ratings. Dimensioning of submodule capacitance is also discussed, which is an important consideration when designing the MMCs in variable-speed drives. The proposed method has been successfully validated by simulation and experimental results.
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analysis of the phase shifted carrier modulation for modular multilevel converters
IEEE Transactions on Power Electronics, 2015Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Gaolin Wang, Wei Wang, Dianguo XuAbstract:The modular multilevel converter (MMC) is an Emerging Topology for high-power applications and is considered as the development trend of the high-voltage power converters. In this paper, general implementation of the phase-shifted carrier (PSC) modulation with a capacitor voltage balancing method for MMC is first introduced. Then, the mathematical analysis of PSC modulation for MMC is performed to identify the PWM harmonic characteristics of the output voltage and the circulating current. Moreover, influence of the carrier displacement angle between the upper and lower arms on these harmonics is also studied. Using this analysis, the optimum displacement angles are specified for the output voltage harmonics minimization and the circulating current harmonics cancellation, respectively. The harmonic features of the line-to-line voltage and the dc-link current are also investigated. Moreover, an extension of the PSC modulation for MMC with full-bridge submodules is also proposed which can increase the equivalent switching frequency of the output voltage and circulating current by two times compared with the conventional MMC. Finally, the findings are verified experimentally on a prototype of MMC.
Binbin Li - One of the best experts on this subject based on the ideXlab platform.
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capacitance reduction of the hybrid modular multilevel converter by decreasing average capacitor voltage in variable speed drives
IEEE Transactions on Power Electronics, 2019Co-Authors: Shaoze Zhou, Binbin Li, Mingxu Guan, Xinyi Zhang, Zigao Xu, Dianguo XuAbstract:Modular multilevel converters (MMCs) represent an Emerging Topology in medium-voltage (MV) and high-voltage applications. But for MV variable-speed motor drives, the MMC faces the challenge of large capacitor voltage ripple at low speeds. Delightfully, a hybrid MMC (HMMC) has proved to be potential in MV motor drives, since this Topology has a lower capacitor voltage ripple and does not introduce any common voltage to the motor. This paper proposed a method to decrease the average capacitor voltage of the HMMC, which can effectively drive the motor at very low speeds without significantly increasing the submodule (SM) capacitance. Moreover, the selection of average capacitor voltage and the dimension of the SM capacitance are presented. Simulation and experimental results verify the effectiveness of the proposed method.
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An Improved Circulating Current Injection Method for Modular Multilevel Converters in Variable-Speed Drives
IEEE Transactions on Industrial Electronics, 2016Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Shaoze Zhou, Dianguo Xu, Concettina Buccella, Carlo CecatiAbstract:Modular multilevel converters (MMC) represent an interesting and Emerging Topology in medium-voltage motor drive applications. The main challenge of using such a Topology in variable-speed drives is the large voltage ripple of submodule capacitors at low speed with constant torque. In this paper, an improved circulating current injection method is proposed, which does not completely eliminate the capacitor voltage ripple, but maintains it bounded within reasonable values. As a result, magnitude of injected circulating current is reduced, leading to converter efficiency improvement and reduction of semiconductor current ratings. Dimensioning of submodule capacitance is also discussed, which is an important consideration when designing the MMCs in variable-speed drives. The proposed method has been successfully validated by simulation and experimental results.
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analysis of the phase shifted carrier modulation for modular multilevel converters
IEEE Transactions on Power Electronics, 2015Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Gaolin Wang, Wei Wang, Dianguo XuAbstract:The modular multilevel converter (MMC) is an Emerging Topology for high-power applications and is considered as the development trend of the high-voltage power converters. In this paper, general implementation of the phase-shifted carrier (PSC) modulation with a capacitor voltage balancing method for MMC is first introduced. Then, the mathematical analysis of PSC modulation for MMC is performed to identify the PWM harmonic characteristics of the output voltage and the circulating current. Moreover, influence of the carrier displacement angle between the upper and lower arms on these harmonics is also studied. Using this analysis, the optimum displacement angles are specified for the output voltage harmonics minimization and the circulating current harmonics cancellation, respectively. The harmonic features of the line-to-line voltage and the dc-link current are also investigated. Moreover, an extension of the PSC modulation for MMC with full-bridge submodules is also proposed which can increase the equivalent switching frequency of the output voltage and circulating current by two times compared with the conventional MMC. Finally, the findings are verified experimentally on a prototype of MMC.
Shaoze Zhou - One of the best experts on this subject based on the ideXlab platform.
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capacitance reduction of the hybrid modular multilevel converter by decreasing average capacitor voltage in variable speed drives
IEEE Transactions on Power Electronics, 2019Co-Authors: Shaoze Zhou, Binbin Li, Mingxu Guan, Xinyi Zhang, Zigao Xu, Dianguo XuAbstract:Modular multilevel converters (MMCs) represent an Emerging Topology in medium-voltage (MV) and high-voltage applications. But for MV variable-speed motor drives, the MMC faces the challenge of large capacitor voltage ripple at low speeds. Delightfully, a hybrid MMC (HMMC) has proved to be potential in MV motor drives, since this Topology has a lower capacitor voltage ripple and does not introduce any common voltage to the motor. This paper proposed a method to decrease the average capacitor voltage of the HMMC, which can effectively drive the motor at very low speeds without significantly increasing the submodule (SM) capacitance. Moreover, the selection of average capacitor voltage and the dimension of the SM capacitance are presented. Simulation and experimental results verify the effectiveness of the proposed method.
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An Improved Circulating Current Injection Method for Modular Multilevel Converters in Variable-Speed Drives
IEEE Transactions on Industrial Electronics, 2016Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Shaoze Zhou, Dianguo Xu, Concettina Buccella, Carlo CecatiAbstract:Modular multilevel converters (MMC) represent an interesting and Emerging Topology in medium-voltage motor drive applications. The main challenge of using such a Topology in variable-speed drives is the large voltage ripple of submodule capacitors at low speed with constant torque. In this paper, an improved circulating current injection method is proposed, which does not completely eliminate the capacitor voltage ripple, but maintains it bounded within reasonable values. As a result, magnitude of injected circulating current is reduced, leading to converter efficiency improvement and reduction of semiconductor current ratings. Dimensioning of submodule capacitance is also discussed, which is an important consideration when designing the MMCs in variable-speed drives. The proposed method has been successfully validated by simulation and experimental results.
Carlo Cecati - One of the best experts on this subject based on the ideXlab platform.
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An Improved Circulating Current Injection Method for Modular Multilevel Converters in Variable-Speed Drives
IEEE Transactions on Industrial Electronics, 2016Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Shaoze Zhou, Dianguo Xu, Concettina Buccella, Carlo CecatiAbstract:Modular multilevel converters (MMC) represent an interesting and Emerging Topology in medium-voltage motor drive applications. The main challenge of using such a Topology in variable-speed drives is the large voltage ripple of submodule capacitors at low speed with constant torque. In this paper, an improved circulating current injection method is proposed, which does not completely eliminate the capacitor voltage ripple, but maintains it bounded within reasonable values. As a result, magnitude of injected circulating current is reduced, leading to converter efficiency improvement and reduction of semiconductor current ratings. Dimensioning of submodule capacitance is also discussed, which is an important consideration when designing the MMCs in variable-speed drives. The proposed method has been successfully validated by simulation and experimental results.
Rongfeng Yang - One of the best experts on this subject based on the ideXlab platform.
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An Improved Circulating Current Injection Method for Modular Multilevel Converters in Variable-Speed Drives
IEEE Transactions on Industrial Electronics, 2016Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Shaoze Zhou, Dianguo Xu, Concettina Buccella, Carlo CecatiAbstract:Modular multilevel converters (MMC) represent an interesting and Emerging Topology in medium-voltage motor drive applications. The main challenge of using such a Topology in variable-speed drives is the large voltage ripple of submodule capacitors at low speed with constant torque. In this paper, an improved circulating current injection method is proposed, which does not completely eliminate the capacitor voltage ripple, but maintains it bounded within reasonable values. As a result, magnitude of injected circulating current is reduced, leading to converter efficiency improvement and reduction of semiconductor current ratings. Dimensioning of submodule capacitance is also discussed, which is an important consideration when designing the MMCs in variable-speed drives. The proposed method has been successfully validated by simulation and experimental results.
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analysis of the phase shifted carrier modulation for modular multilevel converters
IEEE Transactions on Power Electronics, 2015Co-Authors: Binbin Li, Rongfeng Yang, Dandan Xu, Gaolin Wang, Wei Wang, Dianguo XuAbstract:The modular multilevel converter (MMC) is an Emerging Topology for high-power applications and is considered as the development trend of the high-voltage power converters. In this paper, general implementation of the phase-shifted carrier (PSC) modulation with a capacitor voltage balancing method for MMC is first introduced. Then, the mathematical analysis of PSC modulation for MMC is performed to identify the PWM harmonic characteristics of the output voltage and the circulating current. Moreover, influence of the carrier displacement angle between the upper and lower arms on these harmonics is also studied. Using this analysis, the optimum displacement angles are specified for the output voltage harmonics minimization and the circulating current harmonics cancellation, respectively. The harmonic features of the line-to-line voltage and the dc-link current are also investigated. Moreover, an extension of the PSC modulation for MMC with full-bridge submodules is also proposed which can increase the equivalent switching frequency of the output voltage and circulating current by two times compared with the conventional MMC. Finally, the findings are verified experimentally on a prototype of MMC.