The cascaded H-bridge converter (CHB) is a well-known solution for multiple applications, such as motor drives or flexible ac transmission systems, among others. This paper is focused on a CHB composed by a large number of cells (more than three) operated in general with unequal dc voltages. Under this circumstance, the output voltage spectrum presents high harmonic distortion at twice the carrier frequency and its multiples. In order to analyze this phenomenon, a harmonic distortion analysis of the CHB output voltage is presented. From this mathematical analysis, a modification of the phase-shifted PWM modulation is proposed in order to obtain a better harmonic performance.
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Vel Tech Rangarajan Dr Sagunthala R&D Inst Sci &, Dept Elect & Elect Engn, Chennai 600062, Tamil Nadu, IndiaVel Tech Rangarajan Dr Sagunthala R&D Inst Sci &, Dept Elect & Elect Engn, Chennai 600062, Tamil Nadu, India
Charan, N. Hari
Bandyopadhyay, A.
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Natl Inst Technol Meghalaya, Shillong 793003, Meghalaya, IndiaVel Tech Rangarajan Dr Sagunthala R&D Inst Sci &, Dept Elect & Elect Engn, Chennai 600062, Tamil Nadu, India
Bandyopadhyay, A.
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Roy, Priyankar
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Babita, M. A.
Prabhu, M. S.
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Vel Tech Rangarajan Dr Sagunthala R&D Inst Sci &, Dept Elect & Elect Engn, Chennai 600062, Tamil Nadu, IndiaVel Tech Rangarajan Dr Sagunthala R&D Inst Sci &, Dept Elect & Elect Engn, Chennai 600062, Tamil Nadu, India
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North Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USANorth Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USA
Montes, Oscar Andres
Dadzie, David
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North Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USANorth Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USA
Dadzie, David
Lukic, Srdjan
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North Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USANorth Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USA
Lukic, Srdjan
Tu, Hao
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Sichuan Univ, Coll Elect Engn, Chengdu 610065, Peoples R ChinaNorth Carolina State Univ, Future Renewable Elect Energy Delivery & Managemen, Raleigh, NC 27695 USA