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Title: A simple single-input-single-output (SISO) model for a three-phase PWM rectifier
Authors: Yin, B.
Oruganti, R. 
Panda, S.K. 
Bhat, A.K.S.
Keywords: Pulsewidth modulation (PWM) power converters
Voltage mode control
Issue Date: 2009
Citation: Yin, B., Oruganti, R., Panda, S.K., Bhat, A.K.S. (2009). A simple single-input-single-output (SISO) model for a three-phase PWM rectifier. IEEE Transactions on Power Electronics 24 (3) : 620-631. ScholarBank@NUS Repository.
Abstract: The challenge in controlling a three-phase pulsewidth modulation (PWM) rectifier under balanced conditions arises from the fact that the state-space averaged model reported in literature has a multi-input - multi-output nonlinear structure and furthermore exhibits a nonminimum phase feature. In this paper, a simple single-input-single-output model is constructed by separating the d-axis and the q-axis dynamics through appropriate nonlinear feedforward decoupling while maintaining nearly unity power factor operation. With the proposed model, the nonminimum phase feature inherent in an ac-to-dc rectifier becomes a simple right-half-plane zero appearing in the small-signal control-to-output transfer function. In addition, the model exhibits a close similarity to a dc-dc boost converter under both large-signal and small-signal operating conditions. This makes it possible to extend the system analysis and control design techniques of dc-dc converters to the three-phase PWM rectifier also. The validity of the proposed model has been verified experimentally in the frequency domain under open-loop operation of the PWM rectifier. The usefulness of the model is further demonstrated through closed-loop operation of the rectifier with both voltage mode and inner-current-loop-based schemes. © 2009 IEEE.
Source Title: IEEE Transactions on Power Electronics
ISSN: 08858993
DOI: 10.1109/TPEL.2008.2012529
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