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Power balancing in multi-converter systems composed of modular multilevel converters (MMCs)
2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe), 2016Multi-converter systems composed of series or parallel connected modular multilevel converters (MMCs) require a means to manage power sharing between the MMCs by balancing the load during operation. Series connected MMCs require proper voltage balancing while parallel connected MMCs require proper current balancing.
Pawel Blaszczyk +4 more
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Operation of three-phase modular multilevel converter (MMC) with reduced number of arms
2016 IEEE International Conference on Industrial Technology (ICIT), 2016Conventional three-phase MMC consists of six-arms, each arm is controlled to generate unipolar voltage ranging from zero to Vdc where Vdc is the input DC voltage. Each arm voltage has two components (DC and AC components). In this work, the operation of MMC with reduced number of arms (four arms only), correspondingly reduced cost is presented.
Ahmed A. Elserougi +2 more
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Slides - Modular Multilevel Converter (MMC) for Traction Applications
2017TEC Webinar ...
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Modular multilevel converter (MMC) based resonant high voltage multiplier
2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015This paper addresses the limitation of current technologies in the interconnection between medium-voltage (MV) DC and high-voltage (HV) DC grids. One transformerless approach is proposed to achieve bidirectional high power transfer and high step up/down ratio, which can be configured to interface with different grids connection. The proposed technology
Liming Liu, Sandeep Bala
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Efficient Grounding for Modular Multilevel HVDC Converters (MMC) on the AC Side
IEEE Transactions on Power Delivery, 2014An 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 +3 more
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Modular Multilevel Converter (MMC) for Traction Applications Slides
2017Since 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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Reliability-oriented switching frequency analysis for Modular Multilevel Converter (MMC)
2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015In this paper, reliability-oriented switching frequency analysis for Modular Multilevel Converter is investigated. In the medium voltage and high voltage direct current applications, the switching frequency should be low enough to avoid the converter from high switching power losses.
Vahid Najmi +3 more
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IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
Modular multilevel converter (MMC) is considered as an idea and promising candidate for multilevel technology. By connecting two MMCs in back-to-back configuration with a DC transmission cable, a so-called indirect MMC can be constructed for high-voltage direct current transmission application.
Yun Wan, Steven Liu, Jianguo Jiang
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Modular multilevel converter (MMC) is considered as an idea and promising candidate for multilevel technology. By connecting two MMCs in back-to-back configuration with a DC transmission cable, a so-called indirect MMC can be constructed for high-voltage direct current transmission application.
Yun Wan, Steven Liu, Jianguo Jiang
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An improved circuit topology of modular multilevel converter (MMC) for DC to AC applications
2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2016This paper proposes a new circuit topology of MMC for DC to AC applications. The main advantage of the proposed topology is the elimination of lower arms of conventional MMC. Additionally, the DC bus voltage magnitude is half compared to conventional MMC. This is achieved by replacing the lower arms of conventional MMC topology with LC filter.
Nibedita Parida, Anandarup Das
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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), 2017This 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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