Results 11 to 20 of about 1,944 (265)

A Wind Energy Prediction Scheme Combining Cauchy Variation and Reverse Learning Strategy

Advances in Electrical and Computer Engineering, 2021
Modular multilevel converters (MMCs) can be a reliable solution since they have modular structure and high quality output waveform for permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS). Capacitor voltage balancing
WU, X., SHEN, X., ZHANG, J., ZHANG, Y.
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Capacitor voltage balancing strategy based on sub-module capacitor voltage estimation for modular multilevel converters [PDF]

CSEE Journal of Power and Energy Systems, 2016
The modular multilevel converter (MMC) is expected to be used extensively in high-voltage direct current (HVDC) transmission networks because of its superior characteristics over the line-commutated converter (LCC). A key issue of concern is balancing sub-module capacitor voltages in the MMCs, which is critical for the correct operation of these ...
ABDELSALAM, Mahmoud, Marei, Mostafa, TENNAKOON, Sarath, GRIFFITHS, Alison   +3 more
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Capacitor Voltages Measurement and Balancing in Flying Capacitor Multilevel Converters Utilizing a Single Voltage Sensor [PDF]

IEEE Transactions on Power Electronics, 2017
This paper proposes a new method for measuring capacitor voltages in multilevel flying capacitor (FC) converters that requires only one voltage sensor per phase leg. Multiple dc voltage sensors traditionally used to measure the capacitor voltages are replaced with a single voltage sensor at the ac side of the phase leg.
Farivar, Glen, Ghias, Amer M. Y. M., Hredzak, Branislav, Pou, Josep, Agelidis, Vassilios   +4 more
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Active Voltage Balancing of Series Connected SiC MOSFET Submodules Using Pulsewidth Modulation

IEEE Open Journal of Power Electronics, 2021
Series connection of multiple transistors is an attractive solution to achieve higher voltage capability. However, the voltage imbalance among the series-connected devices is a critical issue caused by mismatches of device characteristics and gate ...
Inhwan Lee, Xiu Yao
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An Optimized Capacitor Voltage Balancing Control Strategy of Modular Multilevel Converter Based on Comparison of Variable Reference Values

Zhongguo dianli, 2019
The capacitor voltage balance of modular multilevel converter is the key to its stable operation, aiming at problem of large calculation amount and high switching frequency existing in traditional capacitor voltage balancing strategy. This paper proposes
Fengyang GAO, Guodong QIANG, Yunbo GAO, Guoheng ZHANG   +3 more
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A Novel Submodule Voltage Balancing Scheme for Modular Multilevel Cascade Converter—Double-Star Chopper-Cells (MMCC-DSCC) Based STATCOM

IEEE Access, 2019
A novel capacitor voltage balancing scheme for modular multilevel cascade converter-double-star chopper-cells (MMCC-DSCC)-based STATCOM is proposed in this paper.
Yu Jin, Qian Xiao, Chaoyu Dong, Hongjie Jia, Yunfei Mu, Bing Xie, Yanchao Ji, Sanjay K. Chaudhary, Remus Teodorescu   +8 more
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Capacitor voltage balancing control with reducing the average switching frequency in MMC

The Journal of Engineering, 2019
Modular multilevel converter (MMC) has a very good application prospect in the flexible high-voltage direct current (HVDC) transmission, but higher self-loss will affect the efficiency and restrict the development.
Shunliang Wang, Tianqi Liu, Tianqi Liu, XingChuan Huang, Yuexiao Yu   +4 more
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Improved Control of Capacitor Voltage Balancing in Modular Multilevel Converter Submodules

IEEE Access
An improved incremental capacitor voltage balancing control strategy is proposed to solve the problems of large switching frequency, high complexity of the bubble method sorting algorithm, and exceeding the limit of the capacitor voltage fluctuation rate
Yanling Lyu, Yuansong Zi, Xiaowei Li
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Capacitor balancing controller voltage sorting statistics in modular multilevel converters [PDF]

2017 IEEE Southern Power Electronics Conference (SPEC), 2017
Modular multilevel converters (MMCs) are made up of many submodules (SMs) connected in series. In order to avoid semiconductor over-voltages, SM capacitors should be kept within strict voltage limits. The capacitor balancing controller (CBC) is used to sort SM capacitor voltages prior to modulation.
Heath, Theodor, Green, Peter, Barnes, Mike, Coventry, Paul   +3 more
openaire   +1 more source

Ripple Analysis and Capacitor Voltage Balancing of Five-Level Hybrid Clamped Inverter (5L-HC) for Medium-Voltage Applications

IEEE Access, 2019
The five-level hybrid clamped inverter (5L-HC) is a promising new topology for medium-voltage applications. However, to minimize the capacitors and ensure good performance of the converter, capacitor voltage ripples, as well as voltage balancing control,
Ze Wang, Chao Gao, Canfeng Chen, Jian Xiong, Kai Zhang   +4 more
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