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A New Transformerless Single-Phase Buck-Boost AC Voltage RegulatorYALCIN, F. , HIMMELSTOSS, F. A.
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AC voltage regulator, buck-boost converter, PWM, THD
voltage(30), regulator(22), electronics(10), power(8), isie(8), high(7), converter(6), buck(6), novel(5), chopper(5)
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About this article
Date of Publication: 2016-05-31
Volume 16, Issue 2, Year 2016, On page(s): 63 - 68
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2016.02009
Web of Science Accession Number: 000376996100009
SCOPUS ID: 84974850960
Voltage regulation is one of the important goals for electrical sources and consumers. In this paper a new transformerless single-phase AC voltage regulator based on buck-boost converter topology is presented. The regulator circuit has a simple structure using only two bidirectional active switches, one inductor and one capacitor. A closed loop control system is implemented for the proposed regulator operation. A control law depending on the instantaneous values of the regulator's real input and desired output voltage is obtained and supports the PI controller. The control law allows the controller to obtain efficient pulse width modulation (PWM) switching duty ratio for the desired output voltage when the input voltage has surges or fluctuations and the output load is changed. An experimental laboratory setup has been implemented for the proposed AC voltage regulator. The obtained results demonstrate that the proposed topology is capable of and efficient for both bucking and boosting the input AC voltage to a high quality output voltage with a low total harmonic distortion (THD) for different input voltage and load conditions.
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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