This paper addresses theoretical calculation of a single-phase multilevel pulsewidth modulation (PWM) inverter current total harmonic distortion (THD). Analytical approach introduced in late 1980s for a two-level inverter is generalized for an arbitrary level count for a single-phase inverter. Although the obtained closed-form piecewise analytical solutions assume (infinitely) large ratio of switching and fundamental frequencies and pure inductive load, they are practically very accurate for the ratios of (apparent) switching and fundamental frequencies larger than 25-30 and inductance-dominated loads. Along with strict mathematical solutions, simple accurate Bessel function approximation and hyperbolic average trend one are suggested. The formulas clearly reveal a single-phase PWM inverter current THD dependence on modulation index for an arbitrary voltage level count and are easily modified to cover grid-connected cases.

Simple Time Averaging Current Quality Evaluation of a Single-Phase Multilevel PWM Inverter / Reznikov, Boris; Srndovic, Milan; Familiant, Yakov L.; Grandi, Gabriele; Ruderman, Alex. - In: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. - ISSN 0278-0046. - STAMPA. - 63:6(2016), pp. 7430289.3605-7430289.3615. [10.1109/TIE.2016.2541078]

Simple Time Averaging Current Quality Evaluation of a Single-Phase Multilevel PWM Inverter

Srndovic, Milan;GRANDI, GABRIELE;
2016

Abstract

This paper addresses theoretical calculation of a single-phase multilevel pulsewidth modulation (PWM) inverter current total harmonic distortion (THD). Analytical approach introduced in late 1980s for a two-level inverter is generalized for an arbitrary level count for a single-phase inverter. Although the obtained closed-form piecewise analytical solutions assume (infinitely) large ratio of switching and fundamental frequencies and pure inductive load, they are practically very accurate for the ratios of (apparent) switching and fundamental frequencies larger than 25-30 and inductance-dominated loads. Along with strict mathematical solutions, simple accurate Bessel function approximation and hyperbolic average trend one are suggested. The formulas clearly reveal a single-phase PWM inverter current THD dependence on modulation index for an arbitrary voltage level count and are easily modified to cover grid-connected cases.
2016
Simple Time Averaging Current Quality Evaluation of a Single-Phase Multilevel PWM Inverter / Reznikov, Boris; Srndovic, Milan; Familiant, Yakov L.; Grandi, Gabriele; Ruderman, Alex. - In: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. - ISSN 0278-0046. - STAMPA. - 63:6(2016), pp. 7430289.3605-7430289.3615. [10.1109/TIE.2016.2541078]
Reznikov, Boris; Srndovic, Milan; Familiant, Yakov L.; Grandi, Gabriele; Ruderman, Alex
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/541331
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