Results 141 to 150 of about 490 (182)

Modulation Methods for Balancing the Capacitor Voltages of N-Level Diode-Clamped Converters

IEEE Transactions on Industrial Electronics, 2023
Diode-clamped converters (DCCs) suffer from the inherent capacitor voltage imbalance problem. Most software-based voltage-balancing methods fall into the space vector modulation category and the carrier-based pulsewidth modulation category. Despite their effectiveness for the three-level DCCs, it is not easy to extend them to a general n-level topology.
Huawei Yuan, Hin Sang Lam, Neha Beniwal, Josep Pou, S. Y. Ron Hui   +4 more
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Diode-clamped multilevel converters: a practicable way to balance DC-link voltages

IEEE Transactions on Industrial Electronics, 2002
The converter topologies identified as diode-clamped multilevel (DCM) or, equivalently, as multipoint clamped (MPC), are rarely used in industrial applications, owing to some serious drawbacks involving mainly the stacked bank of capacitors that constitutes their multilevel DC link. The balance of the capacitor voltages is not possible in all operating
MARCHESONI, MARIO, P. TENCA
openaire   +2 more sources

A Novel STATCOM Based on Diode-Clamped Modular Multilevel Converters

IEEE Transactions on Power Electronics, 2017
A new static synchronous compensator (STATCOM) based on the diode-clamped modular multilevel converter (DCM2 C) is proposed in this paper. In this converter topology, the capacitor voltage is clamped by using a low power rating diode in each submodule.
Xiangdong Liu, Jingliang Lv, Congzhe Gao, Zhen Chen, Si Chen   +4 more
openaire   +1 more source

Predictive control of a back to back Diode Clamped Multilevel converter

2010 IEEE International Conference on Industrial Technology, 2010
In this work, a back-to-back Diode Clamped Multilevel converter system using Model Predictive Control is evaluated. DC link voltage balance and currents as main parameters are optimized by means of a proper cost function design. This strategy allows fast system response and capacitors voltage balance under various operating conditions including active ...
Santiago A. Verne, Maria I. Valla
openaire   +1 more source

A diode-clamped multilevel converter with reduced number of clamping diodes

Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04., 2004
This paper presents a diode-clamped multilevel converter topology with reduced number of clamping diodes. The novel topology uses a combination of multilevel converter cells with different number of levels. The proposed topology and its switching pattern are discussed based on a five-level converter, and it can be easily extended to N-level converter ...
null Zhiguo Pan, null Fang Z. Peng, V. Stefanovic, M. Leuthen   +3 more
openaire   +1 more source

A matrix converter without diode clamped over-voltage protection

Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435), 2002
In this paper, the design and testing of a new protection strategy for a matrix power converter feeding an induction motor is described. The new protection strategy, with excellent overvoltage protection, allows to remove the large and expensive diode clamp.
Mahlein, Jochen, Braun, Michael
openaire   +1 more source

Voltage Balancing in Five-Level Diode-Clamped Power Converters

IFAC Proceedings Volumes, 2013
Abstract This paper addresses the voltage imbalance problem of the dc-link capacitors in multilevel power converters. Considering the five-level diode-clamped converter, a mathematical analysis of the capacitor voltage difference dynamics is carried out.
Francisco Umbría, Fabio Gómez-Estern, Francisco Gordillo, Francisco Salas   +3 more
openaire   +1 more source

A Novel Hybrid Voltage Balance Method for Five-Level Diode-Clamped Converters

IEEE Transactions on Industrial Electronics, 2018
Voltage balance control of dc capacitors is the key problem of multilevel diode-clamped converters (DCCs). In this paper, a novel hybrid voltage balance method is proposed for five-level DCCs. First, to balance the upper or lower two capacitors, a novel flying-capacitor-based voltage balance circuit (VBC) is proposed, and the time-domain average model ...
Dongdong Cui, Qiongxuan Ge
openaire   +1 more source

High efficient modeling of a diode clamped Modular Multilevel Converter for EMT simulation

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
Conventional Electromagnetic Transient (EMT) simulations of a Modular Multilevel Converter based HVDC (MMC-HVDC) is quite time consuming. Therefore, the sub modules are often modeled with equivalent transformation methods. In this paper, two equivalent models with much higher efficiency have been presented for a specific MMC topology, i.e.
Wenming Gong, Zhe Zhu, Shukai Xu, Xiaolin Li, Hong Rao   +4 more
openaire   +1 more source

Voltage Balancing Control of Diode-Clamped Multilevel Converters with Passive Front-Ends

2007 IEEE International Symposium on Industrial Electronics, 2007
In the previous literature, it has been reported that it is not possible to guarantee the balance of the dc-link capacitor voltages of three-phase diode-clamped multilevel dc-ac converters with passive front-ends for high modulation indices, especially for more than three levels.
Sergio Busquets-Monge, Salvador Alepuz, Josep Bordonau, Juan Peracaula   +3 more
openaire   +1 more source