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A novel hybrid Phase Shifted-Modified Synchronous Optimal Pulse Width Modulation based 27-level inverter for grid-connected PV system

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  • Gayathri Devi, B.
  • Keshavan, B.K.

Abstract

In grid connected Photovoltaic (PV) systems, Multilevel Inverters (MLI) are commonly employed for providing better reliability and getting minimal harmonics. Most of the MLIs function with Phase-Shifted Pulse Width Modulation (PSPWM) techniques for achieving high level performance. However, in the in existing PSPWM techniques, the harmonic voltage profiles are not efficient. This paper aims to improve the harmonic voltage profile of the 4 KW grid-connected PV system using a novel hybrid PSPWM-Modified Synchronous Optimal PWM (PS-MSOPWM) technique for a 27-level inverter. With the combination of these hybrid PSPWM-Modified SOPWM techniques, optimum switching angles are computed to match the switching frequency with the fundamental frequency. From the results, it is identified that the proposed hybrid modulation method effectively reduces the Total Harmonic Distortion (THD) and exhibits improved reliability of the grid-connected solar system.

Suggested Citation

  • Gayathri Devi, B. & Keshavan, B.K., 2019. "A novel hybrid Phase Shifted-Modified Synchronous Optimal Pulse Width Modulation based 27-level inverter for grid-connected PV system," Energy, Elsevier, vol. 178(C), pages 309-317.
    • Handle: RePEc:eee:energy:v:178:y:2019:i:c:p:309-317
    DOI: 10.1016/j.energy.2019.03.173
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    1. Topal, Huseyin & Taner, Tolga & Naqvi, Syed Arslan Hassan & Altınsoy, Yelda & Amirabedin, Ehsan & Ozkaymak, Mehmet, 2017. "Exergy analysis of a circulating fluidized bed power plant co-firing with olive pits: A case study of power plant in Turkey," Energy, Elsevier, vol. 140(P1), pages 40-46.
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    1. Osmani, Khaled & Haddad, Ahmad & Lemenand, Thierry & Castanier, Bruno & Ramadan, Mohamad, 2021. "An investigation on maximum power extraction algorithms from PV systems with corresponding DC-DC converters," Energy, Elsevier, vol. 224(C).
    2. Jiang, Shiqi & Wang, Panbao & Mei, Zhaozhao & Wang, Wei & Xu, Dianguo, 2021. "A variable inductor based harmonic filter design for multi-phase renewable energy systems with double closed-loop control," Energy, Elsevier, vol. 236(C).

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