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Voltage THD Reduction for Cascaded H-Bridge MLC using Sliding Mode Controlling Approach

Research Area: Volume 7 Issue 1 Year: 2019
Type of Publication: Article Keywords: Cascaded MLI, Sliding Mode Controlling, Hysteresis Modulation
  • Swati Gour
  • Mithlesh Gautam
  • Meha Shrivastava
  • Nilesh Diwakar
  • Rajeev Arya
Journal: IJNIST Volume: 7
Number: 1 Pages: 109-116
Month: Jan-June
ISSN: 2321-0468
In this work, a generalized multiband hysteresis modulation and its characterization have been proposed for the sliding-mode control of cascaded H-bridge multilevel-inverter controlled systems. A frequency-domain method is proposed for the determination of net hysteresis bandwidth for a given desired maximum switching frequency of the inverter. The switching transition concept of Tsypkin’s method and the describing function of nonlinear relay have been used for the derivation of results. A hierarchical switching algorithm has been suggested for the modular cells of the cascaded multilevel inverter. The hierarchy of each cell is swapped sequentially to provide the self-balancing capability in case the dc-link voltage is supported by the capacitors.


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