July 2014
Intermediate to advanced
826 pages
28h 53m
English
book
Power Electronics for Renewable Energy Systems, Transportation and Industrial Applications
by Kamal Al-Haddad, Mariusz Malinowski, Haitham Abu-Rub
Content preview from Power Electronics for Renewable Energy Systems, Transportation and Industrial Applications
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Chapter 14Multilevel Converter/Inverter Topologies and Applications
Baoming Ge1, Fang Zheng Peng1 and Yongdong Li2
1Department of Electrical and Computer Engineering, Michigan State University, Michigan, USA
2Department of Electrical Engineering, Tsinghua University, Beijing, China
14.1 Introduction
The demand for clean energy and energy saving has stimulated the rapid growth of sustainable energy generation and adjustable speed drives (ASDs). Today's wind and solar power unit ratings, as popular renewable energy sources, reach tens of megawatts. Many laminators, mills, conveyors, pumps, fans, blowers and compressors require large ASDs with medium voltage (several kV to tens of kV). In addition, flexible AC transmission system (FACTS) devices for the control of power flow, voltage and frequency are used to increase transmission capacity, reduce congestion, improve controllability and integrate more renewable energy into grids. FACTS devices are normally connected to medium-voltage distribution or to high-voltage transmission systems. For traditional two-level inverters used in the above applications, step-up transformers and/or zigzag transformers are used to reach the medium- and high-voltage levels and to synthesize output voltage to multipulse waveforms. However, transformers are bulky, lossy, high cost and present nonlinear/saturation problems that lead to difficulties in the system control.
Multilevel inverters provide a novel approach for reaching high voltage and reducing ...
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