This manuscript proposes a novel approach for determining phase and neutral-current-ripple RMS in grid-connected four-leg inverters with the neutral inductor. The harmonic pollution is determined for any arbitrary pulse width modulation (PWM) technique and a generic value of the neutral inductor. Thanks to the proposed approach, it is possible to describe the neutral inductor in a parametric way with respect to phase inductors and obtain a wide range of results, ranging from a direct neutral connection (no neutral inductor) to a conventional three-phase inverter (no fourth wire) for any value of modulation index and common mode injection. The results permit one to compare different design choices in multiple scenarios effectively. The findings were validated by numerical simulations and experimental tests employing the most popular PWM techniques, such as space vector PWM (SVPWM) and discontinuous PWM (DPWM).

A Generalized Approach for Determining the Current Ripple RMS in Four-Leg Inverters with the Neutral Inductor / Mandrioli, Riccardo; Lo Franco, Francesco; Ricco, Mattia; Grandi, Gabriele. - In: ENERGIES. - ISSN 1996-1073. - ELETTRONICO. - 16:4(2023), pp. 1710.1-1710.19. [10.3390/en16041710]

A Generalized Approach for Determining the Current Ripple RMS in Four-Leg Inverters with the Neutral Inductor

Mandrioli, Riccardo
Primo
;
Lo Franco, Francesco;Ricco, Mattia;Grandi, Gabriele
Ultimo
2023

Abstract

This manuscript proposes a novel approach for determining phase and neutral-current-ripple RMS in grid-connected four-leg inverters with the neutral inductor. The harmonic pollution is determined for any arbitrary pulse width modulation (PWM) technique and a generic value of the neutral inductor. Thanks to the proposed approach, it is possible to describe the neutral inductor in a parametric way with respect to phase inductors and obtain a wide range of results, ranging from a direct neutral connection (no neutral inductor) to a conventional three-phase inverter (no fourth wire) for any value of modulation index and common mode injection. The results permit one to compare different design choices in multiple scenarios effectively. The findings were validated by numerical simulations and experimental tests employing the most popular PWM techniques, such as space vector PWM (SVPWM) and discontinuous PWM (DPWM).
2023
A Generalized Approach for Determining the Current Ripple RMS in Four-Leg Inverters with the Neutral Inductor / Mandrioli, Riccardo; Lo Franco, Francesco; Ricco, Mattia; Grandi, Gabriele. - In: ENERGIES. - ISSN 1996-1073. - ELETTRONICO. - 16:4(2023), pp. 1710.1-1710.19. [10.3390/en16041710]
Mandrioli, Riccardo; Lo Franco, Francesco; Ricco, Mattia; Grandi, Gabriele
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/918346
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