Book ChapterDOI
Multilevel Converters for Step-Up-Transformer-Less Direct Integration of Renewable Generation Units with Medium Voltage Smart Microgrids
Md. Rabiul Islam,Youguang Guo,Jianguo Zhu +2 more
- pp 127-149
TLDR
It is expected that the medium voltage multilevel converter would have great potential for future renewable generation and smart microgrid applications.Abstract:
For grid integration of renewable generation units, a power frequency transformer operated at 50 or 60 Hz is generally used to step-up the low output voltage (usually ≤690 V) to the medium voltage level (typically 6–36 kV). Because of the heavy weight and large size of the power frequency step-up transformer, the grid integration system can be expensive and complex for installation and maintenance. To achieve a compact and lightweight direct grid connection, a medium voltage multilevel converter may be an alternative approach. Different multilevel converter topologies with switching and control issues are analyzed for their medium voltage applications. The practical implementation issues are also reported in this chapter. It is expected that the medium voltage multilevel converter would have great potential for future renewable generation and smart microgrid applications.read more
Citations
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Multi-level conversion : high voltage choppers and voltage-source inverters
TL;DR: In this paper, a multilevel commutation cell is introduced for high-voltage power conversion, which can be applied to either choppers or voltage-source inverters and generalized to any number of switches.
Journal ArticleDOI
State-of-the-Art of the Medium-Voltage Power Converter Technologies for Grid Integration of Solar Photovoltaic Power Plants
TL;DR: A comprehensive review of the current research activities and the possible future directions of research to develop medium-voltage converter technologies to provide for a cost-effective grid integration of solar PV power plants are presented.
Journal ArticleDOI
Energy Conversion Strategies for Wind Energy System: Electrical, Mechanical and Material Aspects
TL;DR: In this paper , the authors reviewed the classification of wind energy conversion systems and their various mechanical materials and electrical components, and the flow of power in WECS and its control strategies are described.
Book ChapterDOI
Photovoltaic Inverter Topologies for Grid Integration Applications
TL;DR: The operating principle and the converter structure are evaluated and it is expected that the transformerless PV inverter would have great potential for future renewable generation and smart microgrid applications.
Book ChapterDOI
Power Converter Topologies for Grid-Integrated Medium-Voltage Applications
TL;DR: Different multilevel converter topologies, such as neutral point clamped (NPC), flying capacitor (FC), and modular multilesvel cascaded (MMC), have been considered and compared for the design of an 11 kV converter system and the performance is analyzed and compared in the MATLAB/Simulink environment.
References
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A New Neutral-Point-Clamped PWM Inverter
TL;DR: In this article, a neutral-point-clamped PWM inverter composed of main switching devices which operate as switches for PWM and auxiliary switching devices to clamp the output terminal potential to the neutral point potential has been developed.
Journal ArticleDOI
A New Neutral-Point-Clamped PWM Inverter
TL;DR: The neutral-point-clamped PWM inverter adopting the new PWM technique shows an excellent drive system efficiency, including motor efficiency, and is appropriate for a wide-range variable-speed drive system.
Proceedings ArticleDOI
Multilevel converters-a new breed of power converters
Jih-Sheng Lai,Fang Zheng Peng +1 more
TL;DR: This paper presents three multilevel voltage source converters: (1) diode-clamp, (2) flying-capacitors, and (3) cascaded-inverters with separate DC sources.
Journal ArticleDOI
Multilevel converters for large electric drives
TL;DR: Simulation and experimental results show the superiority of the back-to-back diode-clamped converter over two-level pulsewidth-modulation-based drives.
Multi-level conversion : high voltage choppers and voltage-source inverters
TL;DR: In this paper, a multilevel commutation cell is introduced for high-voltage power conversion, which can be applied to either choppers or voltage-source inverters and generalized to any number of switches.