An Improved Space Vector PWM Algorithm with a Seven-Stage Switching Sequence for Three-Level Neutral Point Clamped Voltage Source Inverters

Aleksandr N. Shishkov, Maxim M. Dudkin, Aleksandr S. Maklakov, Le Van Kan, Andrey A. Radionov () and Vlada S. Balabanova
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Aleksandr N. Shishkov: Project Activity Center, Scientific Activity Sector, Moscow Polytechnic University, Bolshaya Semyonovskaya Street 38, 107023 Moscow, Russia
Maxim M. Dudkin: Polytechnic Institute, Department of Electric Drive, Mechatronics and Electromechanics, South Ural State University, Lenin Prospect 76, 454080 Chelyabinsk, Russia
Aleksandr S. Maklakov: Project Activity Center, Scientific Activity Sector, Moscow Polytechnic University, Bolshaya Semyonovskaya Street 38, 107023 Moscow, Russia
Le Van Kan: Project Activity Center, Scientific Activity Sector, Moscow Polytechnic University, Bolshaya Semyonovskaya Street 38, 107023 Moscow, Russia
Andrey A. Radionov: Project Activity Center, Scientific Activity Sector, Moscow Polytechnic University, Bolshaya Semyonovskaya Street 38, 107023 Moscow, Russia
Vlada S. Balabanova: Project Activity Center, Scientific Activity Sector, Moscow Polytechnic University, Bolshaya Semyonovskaya Street 38, 107023 Moscow, Russia

Energies, 2025, vol. 18, issue 10, 1-17

Abstract: The main purpose of this research is to develop an improved space vector pulse-width modulation (SVPWM) algorithm for three-level (3L) neutral point clamped (NPC) voltage source inverters (VSIs). The results of experiments conducted on the three-level power converter laboratory setup showed that the proposed SVPWM algorithm with a seven-stage switching sequence (SS) can reduce a VSI’s switching frequency by 43.48% compared to the SVPWM algorithm with the base SS. It also improves the neutral point (NP) voltage balance in the VSI DC link by 4.2% by controlling the duty factor of distributed base vectors in each SVPWM period based on phase load currents. It reduced the values of the 5th- and 7th-order harmonics of the VSI output voltage by 19% and 15.7%, respectively. The results show that the usage of the improved SVPWM algorithm helps increase the efficiency of a 3L NPC VSI by 0.6% and reduce the higher harmonics. The obtained results confirm the efficiency of the suggested algorithm and its great potential for power converters in industry.

Keywords: power converters; voltage source inverter; space vector PWM; switching sequence; voltage balance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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