Sensorless Predictive Direct Power Control PDPC-SVM For PWM Converter Under Different Input Voltage Conditions
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Date
2020-03-26
Journal Title
Journal ISSN
Volume Title
Publisher
Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
Abstract
In this paper, a new virtual flux (VF) based predictive direct power control
(VF-PDPC) applied for a three-phase pulse width modulation (PWM)
rectifier is proposed. The virtual flux estimation is performed using a pure
integrator in series with a new adaptive algorithm in order to cancel dc offset
and harmonic distortions in the estimated VF. The introduced structure is
able to produce two virtual flux positive sequence components orthogonal
output signals under unbalanced and distorted voltage conditions. The main
features of the proposed virtual flux estimator are, it's a simple structure,
accuracy, and fast VF estimation over the excited integrators. Therefore, the
estimated VF is then used for robust sensorless VF-PDPC with a constant
switching frequency using space vector modulation (SVM) and tested
through numerical simulations. The instantaneous active and reactive powers
provided by orthogonal VF positive sequence components are directly
controlled. More importantly, this configuration gives quasi-sinusoidal and
balanced current under different input voltage conditions without using the
power compensation methods. The results of the simulation confirmed the
validity of the proposed virtual flux algorithm and demonstrated excellent
performance under different input voltage conditions, a complete rejection of
disturbances.