@inproceedings{d30d66e11a534d62b62d588f47601b12,
title = "Interleaved operation of parallel neutral-point clamped inverters with reduced circulating current",
abstract = "Parallel inverters are commonly adopted in high power applications, for instance wind energy system, smart transformer, and power conditioners. Meanwhile, interleaved PWM is usually considered as an optimal approach to reduce the current ripple and harmonics of the parallel inverters. However, in case of a common dc-link, the problem of circulating current emerges and leads to performance degradation. This paper aims at investigating the influence of different modulation techniques on the circulating current of parallel Neutral-Point Clamped (NPC) inverters under interleaved operation. Two modulation techniques: Phase Disposition (PD) and Alternative Phase Opposite Disposition (APOD), have been studied and compared in terms of current ripple, spectrum quality, and circulating current. Though the PD modulation was regarded as the optimum solution in most single NPC cases, it offers worse performance in the parallel NPC application due to higher circulating current. Simulation and experimental validations are provided and show that the APOD leads to much lower circulating current and similar current ripple as well as spectrum quality compared to the PD.",
keywords = "APOD, Circulating current, Interleaved operation, Npc inverters, PD",
author = "Zou, {Zhi Xiang} and Frederik Hahn and Sebastian Brueske and Sandro Guenter and Giampaolo Buticchi and Marco Liserre and Fuchs, {Friedrich W.}",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017 ; Conference date: 01-10-2017 Through 05-10-2017",
year = "2017",
month = nov,
day = "3",
doi = "10.1109/ECCE.2017.8096882",
language = "English",
series = "2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "5254--5261",
booktitle = "2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017",
address = "United States",
}
