Modeling Performance Analysis and Optimization of Modular Multilevel Converter MMC Based VSC HVDC Systems (PhD Thesis)
Nusrat Husain,
Modeling Performance Analysis and Optimization of Modular Multilevel Converter MMC Based VSC HVDC Systems (PhD Thesis) - Karachi : NED University of Engineering and Technology Department of Electronic Engineering, 2020 - XXVI, 99 p. : ill
Includes Bibliographical References
Abstract :
High Voltage Direct Current (HVDC) structures have obtained greater attention in advanced electrical power transmission systems due to their huge power handling capability with numerous advantages. The HVDC transmission systems usually consist of two major types of power-electronic converters, i.e., either the LCCs (Line Commutated Converters) or the self-commutated VSCs (Voltage Source Converters). Although the former topology is a well-known and well-matured HVDC technology, the VSC topology has additional advantages over its counterpart LCC. Modular Multilevel Converter (MMC) is a promising VSC type having further advantages and active research is still going on to enhance its performance.
In the proposed research work, a generalized but improved fundamental-cell (FC) for MMCs is suggested. This new FC based MMC can increase the steps of voltage and current waveforms and thus lessen the number of solid-state power devices, significantly. To produce all voltage steps at the output, various configurations are suggested to determine the FC output. The proposed MMC is compared with the conventional symmetrical and asymmetrical modular multilevel converters. The evaluations confirm that the offered configurations involve a lesser sum of powerelectronic switches, gate-drivers, DC-capacitors, and protection switches; produces more output voltage steps resulting in lesser THD, and provides better efficiency. As a result, the footprint and total cost of the converter decreases. The mathematical model is presented, whereas the performance of the suggested topology is confirmed through the simulations performed in the MATLAB-Simulink® environment, and by prototype hardware results. The insinuations of the results and further research works are also highlighted.
High Voltage Direct Current Thesis
Modular Multi-level Converter (MMC) Thesis
VSC Topology Thesis
621.31912378242 / NUS
Modeling Performance Analysis and Optimization of Modular Multilevel Converter MMC Based VSC HVDC Systems (PhD Thesis) - Karachi : NED University of Engineering and Technology Department of Electronic Engineering, 2020 - XXVI, 99 p. : ill
Includes Bibliographical References
Abstract :
High Voltage Direct Current (HVDC) structures have obtained greater attention in advanced electrical power transmission systems due to their huge power handling capability with numerous advantages. The HVDC transmission systems usually consist of two major types of power-electronic converters, i.e., either the LCCs (Line Commutated Converters) or the self-commutated VSCs (Voltage Source Converters). Although the former topology is a well-known and well-matured HVDC technology, the VSC topology has additional advantages over its counterpart LCC. Modular Multilevel Converter (MMC) is a promising VSC type having further advantages and active research is still going on to enhance its performance.
In the proposed research work, a generalized but improved fundamental-cell (FC) for MMCs is suggested. This new FC based MMC can increase the steps of voltage and current waveforms and thus lessen the number of solid-state power devices, significantly. To produce all voltage steps at the output, various configurations are suggested to determine the FC output. The proposed MMC is compared with the conventional symmetrical and asymmetrical modular multilevel converters. The evaluations confirm that the offered configurations involve a lesser sum of powerelectronic switches, gate-drivers, DC-capacitors, and protection switches; produces more output voltage steps resulting in lesser THD, and provides better efficiency. As a result, the footprint and total cost of the converter decreases. The mathematical model is presented, whereas the performance of the suggested topology is confirmed through the simulations performed in the MATLAB-Simulink® environment, and by prototype hardware results. The insinuations of the results and further research works are also highlighted.
High Voltage Direct Current Thesis
Modular Multi-level Converter (MMC) Thesis
VSC Topology Thesis
621.31912378242 / NUS