Results 151 to 160 of about 951 (185)

Modular Multilevel Converter (MMC) for Traction Applications Slides

2017
Since its initial conception, the transformer has been used in the most diverse applications where insulation and adaptation of voltage levels are demanded. In fact, this device is widely employed either directly or indirectly in all electric engineering fields due its simple design for distinct power and voltage conversion levels.
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A novel capacitor voltage balancing control strategy for modular multilevel converters (MMC)

2013 International Conference on Electrical Machines and Systems (ICEMS), 2013
Recently modular multilevel converters are highly attractive for medium, high-voltage power transition and electrical machine drive. Capacitor voltage sorting is very important for capacitor voltage-balancing control. This paper describes a novel sorting algorithm for capacitor voltage of modular multilevel converters (MMC).
null Lin Wang, null Ping Wang, null Zixin Li, null Yaohua Li   +3 more
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Efficient Grounding for Modular Multilevel HVDC Converters (MMC) on the AC Side

IEEE Transactions on Power Delivery, 2014
An unbalance voltage between a positive pole and negative pole will exist for a long time in an ungrounded modular multilevel converter (MMC) HVDC transmission system. A zig-zag transformer has been proposed to construct an artificial neutral point and keep voltage balance between the positive pole and the negative pole.
Haitian Wang, Guangfu Tang, Zhiyuan He, Jie Yang   +3 more
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Arm Balance Control Scheme of Novel Isolated Modular Multilevel Converter (I-MMC)

2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia), 2019
This paper introduces an isolated modular multilevel converter (I-MMC) structure which can transport the energy power from LVDC to HVDC and HVAC with single-stage, and the arm balance control strategy. The paper also analyzes the reason of leading to the unbalance in arm, establish the relevant model, and propose the unbalance control strategy of the ...
Lin Lin, Qi Chen, Xingang Wu, Chuang Liu, Jinming Li, Dehao Kong   +5 more
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Hierarchical control strategies for islanded microgrids based on modular multilevel converters (MMCs)

2017 2nd International Conference on Power and Renewable Energy (ICPRE), 2017
This paper presents a hierarchical control strategy (HCS) for modular multilevel converter (MMC)-based islanded microgrid which is composed of two parts: the inner MMC control (IMC) and the outer loop control (OLC). The former includes the voltage and current control loops and the circulating current suppression algorithm, which are used to stabilize ...
Zhenyu Wu, Chang Lu, Zhifeng Zhou, Yulong Zhao, Yang Han   +4 more
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Steady-state analysis of modular multilevel converter (MMC) under unbalanced grid conditions

2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016
This paper presents a steady-state analysis of the modular multilevel converter (MMC) for the second order voltage and current ripple prediction under unbalanced conditions, taking the impact of negative sequence current control into account. Using the circular relationship among current and voltage quantities, the magnitudes and initial phase angles ...
Xiaojie Shi, Yalong Li, Zhiqiang Wang, Bo Liu, Leon M. Tolbert, Fred Wang   +5 more
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MMC-UPQC: Application of Modular Multilevel Converter on Unified Power Quality Conditioner

2013 IEEE Power & Energy Society General Meeting, 2013
This paper is presented a topology of Unified Power Quality Conditioner (UPQC) based on Modular Multilevel Converter (MMC), which can compensate all kinds of disturbance from the supply voltage by the series Active Power Filter (APF) and reactive power, harmonic currents generated by nonlinear load by the shunt APF.
null Yunbo Long, null Xiangning Xiao, null Yonghai Xu, null Yu Baolai, null Yunfei Xu, null Junwei Hao   +5 more
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Elimination of low frequency harmonics of modular multilevel converters (MMC): Implications to MMC HVDC and STATCOM

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
Based on pin-pointing the theoretical origin, the second harmonic current in MMC is eliminated at the source and, with it, the low frequency harmonics which proliferate from it. The implications of the elimination to MMC HVDC and MMC STATCOM are discussed.
Can Wang, Boon Teck Ooi
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A novel SVPWM technique for capacitor voltage balancing in modular multilevel converters(MMCs)

2017 11th IEEE International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG), 2017
This paper proposes a novel space vector pulse width modulation (SVPWM) technique to address the capacitor voltage balancing issue in MMCs. The MMC topology consists of cascade connected identical and individual controllable submodules (SMs) to generate higher level output voltages.
M. Aswini Kumar, Mukti Barai
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Cryo-MMC: a Modular Multilevel Converter with Superconducting Arm Coils

2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe), 2021
Coelho-Medeiros, Rafael, Quéval, Loïc, Dai, Jing, Vannier, Jean-Claude, Egrot, Philippe   +4 more
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