Cascade Multilevel Inverters for Utility Applications

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Cascade multilevel inverters have been developed by the authors for utility applications. A cascade M-level inverter consists of (M-1)/2 H- bridges in which each bridge has its own separate dc source. The new inverter: (1) can generate almost sinusoidal waveform voltage while only switching one time per fundamental cycle, (2) can eliminate transformers of multipulse inverters used in conventional utility interfaces and static var compensators, and (3) makes possible direct parallel or series connection to medium- and high-voltage power systems without any transformers. In other words, the cascade inverter is much more efficient and suitable for utility applications than traditional ... continued below

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8 p.

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Peng, F.Z., McKeever, J.W., Adams, D.J. December 31, 1997.

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Description

Cascade multilevel inverters have been developed by the authors for utility applications. A cascade M-level inverter consists of (M-1)/2 H- bridges in which each bridge has its own separate dc source. The new inverter: (1) can generate almost sinusoidal waveform voltage while only switching one time per fundamental cycle, (2) can eliminate transformers of multipulse inverters used in conventional utility interfaces and static var compensators, and (3) makes possible direct parallel or series connection to medium- and high-voltage power systems without any transformers. In other words, the cascade inverter is much more efficient and suitable for utility applications than traditional multipulse and pulse width modulation (PWM) inverters. The authors have experimentally demonstrated the superiority of the new inverter for reactive power (var) and harmonic compensation. This paper will summarize features,feasibility, and control schemes of the cascade inverter for utility applications including utility interface of renewable energy, voltage regulation, var compensation, and harmonic filtering in power systems.Analytical, simulated, and experimental results demonstrate the superiority of the new inverters.

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8 p.

Notes

OSTI as DE97009359

Source

  • IEEE/IECON `97 meeting, New Orleans, LA (United States), 9 Nov 1997

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  • Other: DE97009359
  • Report No.: CONF-971160--1
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 621554
  • Archival Resource Key: ark:/67531/metadc697315

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  • December 31, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 25, 2016, 6:52 p.m.

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Peng, F.Z., McKeever, J.W., Adams, D.J. Cascade Multilevel Inverters for Utility Applications, article, December 31, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc697315/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.