scholarly journals Cascaded H-Bridge Multilevel Converter for a High-Power Medium-Voltage Impedance-Admittance Measurement Unit

2018 ◽  
Author(s):  
Marko Petkovic ◽  
Nicolai Hildebrandt ◽  
Francisco D. Freijedo ◽  
Drazen Dujic
Keyword(s):  
High Power ◽  
Measurement Unit ◽  
Multilevel Converter ◽  
Medium Voltage ◽  
Admittance Measurement

A New Asymmetric and Cascaded Switched Diode Multilevel Inverter Topology for Reduced Switches, DC Source and Blocked Voltage on Switches

2019 ◽  
Vol 28 (04) ◽  
pp. 1950064 ◽  
Author(s):  
S. A. Ahamed Ibrahim ◽  
P. Anbalagan ◽  
M. A. Jagabar Sathik
Keyword(s):  
High Power ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Basic Unit ◽  
Prototype Model ◽  
Multilevel Converter ◽  
Multilevel Converters ◽  
Medium Voltage ◽  
Blocking Voltage ◽  
Inverter Topology

In this paper, a new asymmetric switched diode (ASD) multilevel inverter is presented for medium-voltage and high-power applications. The proposed converter consists of series connection basic unit with full-bridge inverter. In addition to this, a cascaded switched diode (CSD) structure is recommended to generate the higher number of voltage levels. Seven different algorithms are presented to determine the magnitudes of DC sources in CSD topology. To prove the advantages of proposed multilevel converter over recent multilevel converters in terms of blocking voltage, numbers of IGBTs and on-state switches are presented. To show the authority of the proposed multilevel inverter, it is simulated using MATLAB/Simulink and is experimentally tested using prototype model for 13-level inverter. Finally, various output voltage and current waveforms are shown to prove the dynamic behavior of proposed inverter.

scholarly journals Medium Voltage Impedance-Admittance Measurement System Based on the Cascaded H-Bridge Multilevel Converter

2019 ◽  
Vol 22 (2) ◽  
pp. 105
Author(s):  
Marko Petkovic ◽  
Nicolai Hildebrandt ◽  
Francisco D. Freijedo ◽  
Drazen Dujic
Keyword(s):  
Smart Grids ◽  
Renewable Energy Sources ◽  
System Stability ◽  
System Level ◽  
Preliminary Design ◽  
Multilevel Converter ◽  
Medium Voltage ◽  
Recent Trends ◽  
Inverter Topology ◽  
Admittance Measurement

Recent trends in power system design such as an increasing share of renewable energy sources and smart grids are creating different subsystem interactions that require proper investigation, understanding, describing and estimating global system stability through impedance-admittance measurement and identification. This paper proposes and presents the cascaded H-bridge multilevel inverter topology for perturbation injection converter and impedance-admittance measurement. The methodology of impedance-admittance measurement is explained together with different measurements requirements. Performance and suitability of this topology for impedance-admittance measurement is evaluated through simulations. Preliminary design principles are given for the converter. System level feasibility of the solution is proposed as a main result of the work.

Analysis and Optimization of Modulation Transitions in Medium Voltage High Power Converters

2021 ◽  
pp. 1-1
Author(s):  
Hector Fernandez-Rebolleda ◽  
Alain Sanchez-Ruiz ◽  
Salvador Ceballos ◽  
Angel Perez-Basante ◽  
Juan Jose Valera Garcia ◽  
...  
Keyword(s):  
High Power ◽  
Power Converters ◽  
Medium Voltage
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