Multilevel converters: topologies, modulation and control

2016 ◽  
pp. 267-306
Author(s):  
Pou ◽  
Konstantinou ◽  
Ceballos
Keyword(s):  
Multilevel Converters ◽  
And Control

scholarly journals Fault Simulations in a Multiterminal High Voltage DC Network with Modular Multilevel Converters Using Full-Bridge Submodules

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1653
Author(s):  
Ioan-Cătălin Damian ◽  
Mircea Eremia ◽  
Lucian Toma
Keyword(s):  
High Voltage ◽  
Energy Resource ◽  
Fault Analysis ◽  
Renewable Energy Resource ◽  
Dynamic Simulations ◽  
Multilevel Converters ◽  
Strong Focus ◽  
Modular Multilevel Converters ◽  
Overhead Power Lines ◽  
And Control

The concept of high-voltage DC transmission using a multiterminal configuration is presently a central topic of research and investment due to rekindled interest in renewable energy resource integration. Moreover, great attention is given to fault analysis, which leads to the necessity of developing proper tools that enable proficient dynamic simulations. This paper leverages models and control system design techniques and demonstrates their appropriateness for scenarios in which faults are applied. Furthermore, this paper relies on full-bridge submodule topologies in order to underline the increase in resilience that such a configuration brings to the multiterminal DC network, after an unexpected disturbance. Therefore, strong focus is given to fault response, considering that converters use a full-bridge topology and that overhead power lines connect the terminals.

Analysis and Control of Three-Phase Modular Multilevel Converters Under the Single Arm Fault Condition

2019 ◽  
Vol 34 (9) ◽  
pp. 8293-8298 ◽  
Author(s):  
Chao Wang ◽  
Kui Wang ◽  
Zedong Zheng ◽  
Bo Yang ◽  
Kai Sun ◽  
...  
Keyword(s):  
Multilevel Converters ◽  
Three Phase ◽  
Modular Multilevel Converters ◽  
And Control

scholarly journals Voltage Jump Suppression and Capacitor Voltage Fluctuation Analysis for a Four-Level Hybrid Flying Capacitor T-Type Converter

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 698 ◽  
Author(s):  
Chen Wei ◽  
Xibo Yuan ◽  
Juan Zhou ◽  
Kangan Wang ◽  
Yonglei Zhang ◽  
...  
Keyword(s):  
Dead Time ◽  
Fluctuation Analysis ◽  
Voltage Fluctuation ◽  
Multilevel Converters ◽  
Medium Voltage ◽  
Time Period ◽  
Capacitor Voltage ◽  
And Control ◽  
Laboratory Prototype ◽  
Voltage Jump

In low and medium voltage power conversion systems, multilevel converters are becoming more and more attractive due to improved power density. However, the complexity of topology and control is a big challenge for the application of multilevel converters. In this paper, a four-level (4L) hybrid flying capacitor (FC) T-type converter has been researched in detail. The topological advantage of the converter is displayed in comparison to existing four-level converters. According to the feature of the topology, the operating status has been analyzed and the reason for the voltage jump is researched in detail during the dead-time period. A strategy to reduce voltage jump by adjusting the switching states has be presented. The FC voltages can be balanced by selecting the appropriate switching states. The relationships between the fluctuations of FC voltages and the modulation index and power factor (PF) have been analyzed by simulation results. The performance of the 4L converter has been investigated in MATLAB/Simulink as well as on a down-scaled laboratory prototype.

scholarly journals Operation and Control of a Seven-Level V-Clamp Multilevel Converter

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4761
Author(s):  
Yao Xue ◽  
Xiaofeng Yang ◽  
Lutian Yuan ◽  
Trillion Q. Zheng
Keyword(s):  
Power Conversion ◽  
Modulation Method ◽  
Multilevel Converter ◽  
Multilevel Converters ◽  
Output Performance ◽  
Flying Capacitors ◽  
Dynamic Voltage ◽  
Set Up ◽  
And Control ◽  
Laboratory Prototype

Multilevel converters are well suited for high-power and high-quality power conversion. This paper presents a new seven-level V-clamp multilevel converter (VMC) with reduced clamping devices. All phases of the VMC share common DC-link capacitors and realize bidirectional power conversion without flying capacitors. Each branch of the VMC sustains only a single-level voltage of the DC-link capacitors during its commutation process. Hence, the series switches can be controlled as simple as one switch and the dynamic voltage unbalancing issue is avoided. In this paper, the operation principle and the modulation method of the VMC are analyzed in detail. In addition, compensation control for non-ideal factors is designed to improve the output performance. The output fundamental distortion is compensated and the harmonics are reduced. Finally, a laboratory prototype of the seven-level VMC is set up to verify the feasibility of the presented topology and analysis.

Analysis and Control of Modular Multilevel Converters Under Unbalanced Conditions

2013 ◽  
Vol 28 (4) ◽  
pp. 1986-1995 ◽  
Author(s):  
Yuebin Zhou ◽  
Daozhuo Jiang ◽  
Jie Guo ◽  
Pengfei Hu ◽  
Yiqiao Liang
Keyword(s):  
Multilevel Converters ◽  
Modular Multilevel Converters ◽  
And Control

Decoupled Current Model and Control of Modular Multilevel Converters

2015 ◽  
Vol 62 (9) ◽  
pp. 5382-5392 ◽  
Author(s):  
Ricardo Lizana ◽  
Marcelo A. Perez ◽  
David Arancibia ◽  
Jose R. Espinoza ◽  
Jose Rodriguez
Keyword(s):  
Current Model ◽  
Multilevel Converters ◽  
Modular Multilevel Converters ◽  
And Control

scholarly journals Performance Analysis and control strategies of Cascaded Multilevel Converters

2019 ◽  
pp. 327-336
Author(s):  
Polu Veera Pratap ◽  
S. Sridhar
Keyword(s):  
Performance Analysis ◽  
High Voltage ◽  
High Power ◽  
Control Strategies ◽  
Multilevel Inverter ◽  
Multilevel Converters ◽  
Matlab Simulink ◽  
Multilevel Inverters ◽  
And Control ◽  
Gate Drives

Multilevel inverters have been widely used for high-voltage and high-power applications. Their perf0rmance is greatly superi0r t0 that 0f c0nventi0nal tw0-level inverters due t0 their reduced t0tal harm0nic dist0rti0n (THD),. This t0p0l0gy requires fewer c0mp0nents when c0mpared t0 di0de clamped, flying capacit0r and Bridgeless cascaded inverters and it requires fewer carrier signals and gate drives. Theref0re, the 0verall c0st and circuit c0mplexity are greatly reduced. This paper presents a n0vel reference and multicarrier based PWM scheme It als0 c0mpares the perf0rmance 0f the pr0p0sed scheme with that 0f c0nventi0nal cascaded bridge less rectifier (CBR) multilevel inverters. finally Simulati0n results fr0m MATLAB/SIMULINK are presented t0 verify the perf0rmance 0f the Five-level Multilevel Inverter

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