Results 171 to 180 of about 673,416 (205)

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
openaire   +2 more sources

A novel voltage balancing method of Modular Multilevel Converter (MMC)

2011 International Conference on Energy, Automation and Signal, 2011
The main problem in the new potential Modular Multilevel converter (MMC) topology for high and medium level is the voltage balancing of the capacitors of their sub modules. The novel balancing technique which is introduced in this paper based on sorting of the capacitor voltages. After sorting and detection of the arm current direction, neither require
P. M. Meshram, V. B. Borghate
openaire   +1 more source

An equivalent power test scheme for modular multilevel converters (MMCs)

2017 IEEE Applied Power Electronics Conference and Exposition (APEC), 2017
For modular multilevel converters (MMCs), it is important to investigate the electromagnetic and electrothermal performance of sub-modules for design validation and optimization. This paper presents an equivalent test scheme for sub-modules, which has the clear advantages of system simplicity and reduced facility requirements.
Junsong Tang, Yufei Dong, Heya Yang, Wuhua Li, Xiangning He, Jun Ma, Guodong Chen, Ye Tian, Enxing Yang   +8 more
openaire   +1 more source

A novel topology and control strategy of modular multilevel converter (MMC)

2011 International Conference on Electrical and Control Engineering, 2011
Modular multilevel converter (MMC) is a newly introduced topology of multilevel converter, which is based on cascade connection of chopper-cells per leg. This paper presents a novel topology of MMC, in which, based on traditional topology of MMC, H-bridge (HB) cells are used for more levels of output voltage. Corresponding control strategy is presented
Chun Gao, Jianguo Jiang, Xingwu Yang, Liang Xie, Kai Cao   +4 more
openaire   +1 more source

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), 2016
Multi-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, Michael Steurer, Dionne Soto, Matthew Bosworth, Manfred Winkelnkemper   +4 more
openaire   +1 more source

Operation of three-phase modular multilevel converter (MMC) with reduced number of arms

2016 IEEE International Conference on Industrial Technology (ICIT), 2016
Conventional 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, Shehab Ahmed, Ahmed M. Massoud   +2 more
openaire   +2 more sources

Modular multilevel converter (MMC) based resonant high voltage multiplier

2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015
This 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
openaire   +1 more source

Slides - Modular Multilevel Converter (MMC) for Traction Applications

2017
TEC Webinar ...
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source