NDLI: Observer based power feedforward control for AC/AC converters

Content Provider	IEEE Xplore Digital Library
Author	Uhrin, R. Zboray, L. Profumo, F.
Copyright Year	1998
Description	Author affiliation: Div. of Regulation & Control, SIEI SpA, Gerenzano, Italy (Uhrin, R.)
Abstract	In this paper a disturbance observer based power feedforward is proposed as a new alternative control solution of the input AC/DC stage of a quasi direct AC/AC converter. The observer identifies the DC link current drawn by the output inverter section. The observed load current is then used to constitute the DC link power based feedforward signal added to the output of the converter DC link voltage regulator improving its dynamic response. This solution permits achievement of the fast dynamic response to the load power requirements resulting in DC link voltage variation comparable to the one obtainable by the traditional solutions. Furthermore, the proposed solution overcomes typical drawbacks of the traditional approaches based on the power estimated in the inverter stage such as a fast communication link, etc. The control of the input AC/DC converter can be contained in a DSP separated from the output inverter stage, still maintaining high performance characteristics. This solution is also attractive for the stand alone AC/DC converters suitable for common DC bus systems. The simulation and the experimental comparison of several existing control schemes with the proposed one confirms that the observer based feedforward provides equivalent performance characteristics. The experimental results are obtained from a 7.5 kW quasi direct AC/AC converter. The paper also focuses on the observer design methodology.
Starting Page	1657
Ending Page	1662
File Size	537397
Page Count	6
File Format	PDF
ISBN	0780349431
ISSN	01972618
DOI	10.1109/IAS.1998.729762
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation inverters Reactive power State feedback Regulators Design methodology Communication system control Drives Control systems Harmonic distortion Voltage control
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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