Modelling and controlling of multilevel converters for smart grid applications

The modular multilevel converter (MMC) has been a subject of increasing interests for medium and high-power conversions in smart grids application. There have been several advancements of MMC over the last few years, however, MMC presents new challenges mainly due to the increasing complexity of con...

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Main Author: Dzulfaqar Shah Muhamad
Other Authors: Tang Yi
Format: Final Year Project
Language:English
Published: 2018
Subjects:
Online Access:http://hdl.handle.net/10356/76317
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-763172023-07-07T16:16:24Z Modelling and controlling of multilevel converters for smart grid applications Dzulfaqar Shah Muhamad Tang Yi School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering The modular multilevel converter (MMC) has been a subject of increasing interests for medium and high-power conversions in smart grids application. There have been several advancements of MMC over the last few years, however, MMC presents new challenges mainly due to the increasing complexity of controlling power circuits and more available switching states. The objectives are to provide techniques for the following control objectives which are voltage capacitor balancing method, output power control and voltage ripple reduction. Capacitor voltage fluctuation is still an issue in MMC, hence, capacitor voltage balancing control is needed to maintain the capacitor voltages using a voltage sorting algorithm and PD-PWM. The output power control uses a resonant controller to track the output current. It is noted that resonant controller is only used for single-phased MMC. In a three-phased system, a Direct-Quadrature-Zero (D-Q) or Space Vector transformation will be chosen to simplify the complexity of the control loops. The Capacitor Voltage Ripple depends on the upper and lower SM capacitor currents. Moreover, they also depend on the upper and lower modulation signals and the upper and lower arm currents. Bachelor of Engineering (Electrical and Electronic Engineering) 2018-12-18T13:38:52Z 2018-12-18T13:38:52Z 2018 Final Year Project (FYP) http://hdl.handle.net/10356/76317 en Nanyang Technological University 43 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Dzulfaqar Shah Muhamad
Modelling and controlling of multilevel converters for smart grid applications
description The modular multilevel converter (MMC) has been a subject of increasing interests for medium and high-power conversions in smart grids application. There have been several advancements of MMC over the last few years, however, MMC presents new challenges mainly due to the increasing complexity of controlling power circuits and more available switching states. The objectives are to provide techniques for the following control objectives which are voltage capacitor balancing method, output power control and voltage ripple reduction. Capacitor voltage fluctuation is still an issue in MMC, hence, capacitor voltage balancing control is needed to maintain the capacitor voltages using a voltage sorting algorithm and PD-PWM. The output power control uses a resonant controller to track the output current. It is noted that resonant controller is only used for single-phased MMC. In a three-phased system, a Direct-Quadrature-Zero (D-Q) or Space Vector transformation will be chosen to simplify the complexity of the control loops. The Capacitor Voltage Ripple depends on the upper and lower SM capacitor currents. Moreover, they also depend on the upper and lower modulation signals and the upper and lower arm currents.
author2 Tang Yi
author_facet Tang Yi
Dzulfaqar Shah Muhamad
format Final Year Project
author Dzulfaqar Shah Muhamad
author_sort Dzulfaqar Shah Muhamad
title Modelling and controlling of multilevel converters for smart grid applications
title_short Modelling and controlling of multilevel converters for smart grid applications
title_full Modelling and controlling of multilevel converters for smart grid applications
title_fullStr Modelling and controlling of multilevel converters for smart grid applications
title_full_unstemmed Modelling and controlling of multilevel converters for smart grid applications
title_sort modelling and controlling of multilevel converters for smart grid applications
publishDate 2018
url http://hdl.handle.net/10356/76317
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