NDLI: Virtual-sensor-based control of PWM current source rectifiers

Content Provider	IEEE Xplore Digital Library
Author	Espinoza, J.R. Joos, G. Araya, E. Sbarbaro, D. Moran, L.A.T.
Copyright Year	1999
Description	Author affiliation: Dept. de Ingenieria Electr., Univ. de Concepcion, Chile (Espinoza, J.R.)
Abstract	High performance control strategies applied to pulse-width modulated current source rectifiers (PWM-CSR) require sensing of the supply currents, the input capacitor voltages, and synchronization with the AC supply voltage in addition to the DC voltage and current sensors used for protection purposes. For instance, control strategies developed to provide the necessary input line current damping-thus avoiding the need for damping resistors-and decoupled control of the active and reactive instantaneous powers, require the sensing of the supply currents and input capacitor voltages. As a result, a large number of sensors is needed and the over all reliability is therefore reduced. This paper proposes a technique based on virtual sensors to provide the required AC current and voltage values without actually sensing the electrical variables. The technique takes into account the nonlinear model of the PWM-CSR by using the information from the DC current and DC voltage sensors in combination with a linear state observer and a linear parameter identification algorithm. As a result, at least four sensors can be eliminated, while the features of the control strategy are preserved. The paper includes a complete formulation of the virtual sensor based algorithm and its application to the control of active and reactive instantaneous powers in a PWM-CSR. Results are presented to confirm the validity of the theoretical considerations.
Starting Page	2201
Ending Page	2207
File Size	592301
Page Count	7
File Format	PDF
ISBN	078035589X
ISSN	01972618
DOI	10.1109/IAS.1999.798759
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space vector pulse width modulation Damping Parameter estimation Capacitors Rectifiers Pulse width modulation Current supplies Capacitive sensors Voltage control Protection
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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