NDLI: Control-oriented modelling and adaptive control of a single-phase quasi-Z-source inverter

Content Provider	IEEE Xplore Digital Library
Author	Vazquez Sieber, A. Haimovich, H. Romero, M.E.
Copyright Year	2013
Description	Author affiliation: Dept. de Electron., Univ. Nac. de Rosario, Rosario, Argentina (Vazquez Sieber, A.; Romero, M.E.) \|\| Dept. de Control, Univ. Nac. de Rosario, Rosario, Argentina (Haimovich, H.)
Abstract	One key feature of Z-source and quasi-Z-source converters is the inclusion of a fully reactive network (the Z network) between input voltage source and inverter bridge. The inclusion of the Z network enables the possibility of utilizing the so-called shoot-through mode, i.e. the simultaneous activation of both switches in a single inverter bridge leg. Typical control strategies for these converters involve two separate objectives: (a) the control of Z-network variables (capacitor voltages) aimed at regulating the Z-network-to-inverter-bridge voltage and (b) standard inverter bridge output control. Modelling and control of the Z-network behavior, aiming at objective (a), is complicated by the fact that the current drawn from the Z-network by the inverter bridge during non shoot-through may be discontinuous and cannot be considered constant, especially in the case of a single-phase inverter. Our main contribution is to derive an adequately simple and sufficiently useful control-oriented model for the Z-network variables, taking full account of the variability of the aforementioned current and hence avoiding restrictive assumptions on the load or the PWM modulation strategy. A second contribution is to derive, based on the Z-network model, an adaptive control law able to compensate for large-signal variations. Successful operation is illustrated by means of a simulation example.
Sponsorship	IEEE Ind. Electron. Soc.
Starting Page	572
Ending Page	577
File Size	615669
Page Count	6
File Format	PDF
ISBN	9781479902248
ISSN	1553572X
DOI	10.1109/IECON.2013.6699198
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-10
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inverters Load modeling Voltage control Bridge circuits Mathematical model Adaptation models Switches large-signal perturbations Single-phase quasi-Z-Source inverter averaged model continuous conduction gain-scheduling feedforward
Content Type	Text
Resource Type	Article

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