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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Indonesian Journal of Electrical Engineering and Computer Science
Anitha, Golkonda
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Control & Systems Engineering Electrical & Electronics Engineering

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SVPWM technique for 3-ph 6-switch and 3-ph 4-switch inverters - a comparison Anitha, Golkonda; Krishnaveni, Kondreddi; Yesuratnam, Guduri
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 15, No 4: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v15.i4.pp2334-2343

Abstract

A novel 3-ph 4-switch inverter (TPFSI) is described in this study to reduce the inverter's size, complexity, cost, and losses during the conduction and switching process. This TPFS inverter is based on the principle of similarity of a 3-ph 6-switch inverter (TPSSI) where αβ plane is separated into six sectors to form the required reference voltage space vector. It has been demonstrated that TPFS inverters are more efficient than TPSS inverters while operating with different loads. A mathematical concept for the space vector pulse width modulation (SVPWM) technique has been developed for TPFSI by using Clarke's transformation. In this paper, a TPFS inverter model is designed to reduce the harmonic content in the output voltage and current responses when connected to different loads. The suggested modulation method enhances the output voltage/current response, resulting in usually balanced waveforms and reduced harmonic distortion. MATLAB/Simulink software is utilized to analyze the output response of both inverters.
A new modified B4 inverter using SRF controller with SVPWM technique for grid-connected PV system Anitha, Golkonda; Kondreddi, Krishnaveni; Yesuratnam, Guduri
Indonesian Journal of Electrical Engineering and Computer Science Vol 38, No 3: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v38.i3.pp1411-1421

Abstract

The integration of renewable power sources into the grid presents a complex challenge, as the grid operates at AC voltage, while photovoltaic (PV) arrays generate DC power. A 3-phase inverter synchronizes with the grid’s voltage and frequency for efficient energy integration. In conventional technique, a 3-ph 6-switch (B6) inverter is used for sharing the power to the grid. In this paper reduced switch count 3-ph 4-switch (B4) inverter topology is introduced with reduced power losses. This topology has 4 insulated gate bipolar transistor (IGBT) switches and two capacitors replacing the other 2 switches positioned in one leg of the inverter, which connects to a grid connected PV system. A grid synchronization method called synchronous reference frame (SRF) based proportional integral (PI) is used to track the phase angle of the grid and subsequently inject current into the grid. A B4 inverter is operated by a novel space vector pulse width modulation (SVPWM) control technique which operates in 4 possible switching states. A comparative analysis is carried out with the PV array grid integration connected through B4 and B6 inverter topologies with SRF control. The modeling and design are carried out in a MATLAB/Simulink environment with graphs plotted according to the conditions. The comparative analysis validates the importance of SRF controllers for the grid integration of any renewable source.
Co-Authors Kondreddi, Krishnaveni Krishnaveni, Kondreddi Yesuratnam, Guduri