This paper proposes a general analytical method for the harmonic elimination in three-phase cascaded H-bridge inverters with l=2cdot 2^{n}+1 levels. The solution, consisting of 2 n switching angles, removes the first n low order harmonics and their multiples from the output, keeping the amplitude of the fundamental harmonic fixed by the modulation index, and is obtained for a wide range of modulation indices. If a switching angle is greater than pi/2, it is modified such as to obtain a valid solution. The proposed method has been successfully verified with simulations issued with 5, 9, and 17 level inverters and with a 9-level experimental test rig.

Linear-System-Based Selective Harmonic Elimination Solution for Multilevel Inverters

Buccella C.;Cimoroni M. G.;Cecati C.
2021

Abstract

This paper proposes a general analytical method for the harmonic elimination in three-phase cascaded H-bridge inverters with l=2cdot 2^{n}+1 levels. The solution, consisting of 2 n switching angles, removes the first n low order harmonics and their multiples from the output, keeping the amplitude of the fundamental harmonic fixed by the modulation index, and is obtained for a wide range of modulation indices. If a switching angle is greater than pi/2, it is modified such as to obtain a valid solution. The proposed method has been successfully verified with simulations issued with 5, 9, and 17 level inverters and with a 9-level experimental test rig.
978-1-7281-5135-9
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11697/183872
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