Design and Development of a Novel 19-Level Inverter Using an Effective Fundamental Switching Strategy

• Published in: IEEE journal of emerging and selected topics in power electronics Vol. 6; no. 4; pp. 1903 - 1911
• Main Authors: Venkataramanaiah, J., Suresh, Y., Panda, Anup Kumar
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.12.2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Component reliability; Computer simulation; Electric potential; Fundamental sine quantized switching technique (FSQST); Harmonic analysis; Harmonic distortion; Inverters; multilevel inverter (MLI); Phase transformers; Power harmonic filters; Switches; Switching; Topology; total harmonic distortion (THD); Watermarking; Waveforms
• ISSN: 2168-6777; 2168-6785
• DOI: 10.1109/JESTPE.2017.2776294

This paper presents a single-phase 19-level inverter with fewer switching components, leading to reducing the cost and enhancing reliability for renewable applications. The anticipated multilevel inverter has two bridges that generate quasi-square and seven-level uneven waveforms with equal magnitude steps. Two voltage waveforms are cascaded at secondary side of transformers to create the 19-level output voltage waveform. Furthermore, to find the appropriate switching instants of the proposed configuration, a new fundamental switching method called the fundamental sine quantized switching technique is presented. In fact, it has the capacity to provide the <inline-formula> <tex-math notation="LaTeX">N </tex-math></inline-formula> number of switching instants with less computational efforts, and attain optimized total harmonic distortion in the output voltage. Finally, performance of the proposed topology is validated with simulations and a hardware setup.