Investigation of three-phase AC-DC-AC multilevel nine-leg converter

Maia, Ayslan C. N.; Jacobina, Cursino B.; Freitas, Nayara B. de; Vitorino, Montiê A.

doi:10.1109/ecce.2015.7310492

Cited by 3 publications

(2 citation statements)

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“…When P k is positive, v Ck (the DC-link voltage of converter k) increases and, when P k is negative, v Ck decreases. According to the equations (12) and (16), P vk depends on the values of the parameters µ gh and µ lh and, consequently, their values can be used in order to control v Ck .…”

Section: Current Rating Of Power Switchesmentioning

confidence: 99%

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Investigation of Three-Phase AC–DC–AC Multilevel Nine-Leg Converter

Maia

Jacobina

Freitas

et al. 2016

IEEE Trans. on Ind. Applicat.

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In this paper, a reversible multilevel nineleg converter for three-phase applications is investigated. This topology can be applied in line voltage regulators, power factor correction (PFC) devices and uninterrupted power supplies (UPS). It is composed of three singlephase three-leg converters with a leg shared by both load and grid sides. Suitable modelling, a pulse-width modulation (PWM) strategy based on vector approach and a control system are developed. The proposed PWM and control strategies are suitable to balance the DC-link voltages and to optimize the harmonic distortion, reducing switching stress and power losses. The investigated configuration is compared with two conventional topologies, including a neutral-point clamped (NPC) converter, and has demonstrated that it presents some advantages in terms of voltage rating of the power switches, harmonic distortion and semiconductor losses. Computer simulations and experimental results have been carried in the same operation conditions to verify the validity of theoretical considerations.

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Section: Current Rating Of Power Switchesmentioning

confidence: 99%

“…1(a), denoted as the nine-leg converter (9L), is investigated in this work. The previous version of this paper was presented in ECCE 2015 [12]. Fig.…”

Section: Introductionmentioning

confidence: 99%