NDLI: Novel modulation and control strategy for five-level ANPC converter with unbalanced DC voltage applied to a single-phase grid connected PV system

Content Provider	IEEE Xplore Digital Library
Author	Teymour, H.R. Sutanto, D. Muttaqi, K.M. Ciufo, P.
Copyright Year	2013
Description	Author affiliation: Univ. of Wollongong, Wollongong, NSW, Australia (Teymour, H.R.; Sutanto, D.; Muttaqi, K.M.; Ciufo, P.)
Abstract	This paper proposes a new control strategy and a novel modulation technique for a grid-connected photo-voltaic (PV) system using a single-phase five-level flying capacitor (FC) based active-neutral-point-clamped (ANPC) converter. The proposed modulator can control the FC voltage to follow the requested reference value and simultaneously generate the required ac output voltage regardless of the values of the dc capacitor voltages of the converter. By implementing this method, smaller values of dc-link and flying capacitors can be used even in applications that could experience ripple or transient in the capacitors voltage. In the grid-connected single-phase five-level ANPC, where the capacitors can experience pulsation power and dc-link balancing issues, the selection of the reference voltage value for the FC can play an important role to balance the average values of the dc-link capacitors voltage. The proposed new control strategy uses a new reference voltage for the FC to be applied by the new modulator to have an average balanced dc-link voltages as well as an ac output voltage with good power quality. Simulation studies demonstrate the effectiveness of the proposed modulation technique and control strategy even with using relatively small dc capacitors to produce high quality output voltage and current and maintaining an average balanced dc-link voltages.
Starting Page	1
Ending Page	8
File Size	2967136
Page Count	8
File Format	PDF
ISSN	01972618
e-ISBN	9781467352024
DOI	10.1109/IAS.2013.6682502
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multilevel converters Active-neutral-point-clamped (ANPC) converter Capacitors Switches Voltage balancing Pulse width modulation Robustness Inverters Flying capacitor Artificial intelligence Photovoltaic (PV) power system
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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