abstract

• In this paper a new modulation strategy for the single-phase H-bridge neutral point clamped (HNPC) topology is presented. The proposed modulation scheme allows the conventional five levels multilevel inverter to generate a seven levels output voltage waveform, without any changes in the structure of the HNPC topology. For this purpose a modulation scheme based on the typical Level Shift Pulse Width Modulation (LS-PWM) is designed. In order to obtain the seven output voltage levels, the DC-link is split in asymmetric form, that is one of the DC-side capacitor voltage is the double of the other one. Numerical results were obtained for a grid-tied photovoltaic system in order to evaluate the performance of the proposed modulation technique. An efficiency analysis of the proposed modulation strategy is also shown to illustrate the advantage of this scheme. © 2018 IEEE.

authors

• Campos Delgado Daniel Ulises
• Martinez-Garcia J.F.
• Martínez Rodríguez Pánfilo Raymundo
• Sosa-Zuniga J.M.
• Valdéz Fernández Andrés Alejandro
• Vazquez-Guzman G.

publication date

• 2019-01-01

published in

• 2018 IEEE International Autumn Meeting on Power, Electronics and Computing, ROPEC 2018  Proceedings

keywords

• Bridge circuits; Photovoltaic cells; Pulse width modulation; Voltage control; Capacitor voltages; Design and analysis; Efficiency analysis; Modulation strategy; Modulation techniques; Multilevel inverter; Neutral point clamped; Photovoltaic systems; Topology

Digital Object Identifier (DOI)

• 10.1109/ROPEC.2018.8661361

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