2024 : 5 : 19
Amin Mirzaei naghlbari

Amin Mirzaei naghlbari

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-5120-6602
Education: PhD.
ScopusId: 36809806700
Faculty: Engineering
Address: Arak University


Compensating Voltage Sag in Distribution Systems Using Single Phase Quasi-Z-Source AC/AC Converter
voltage sag, pulse width modulation, quasi-Z-source, continuous current mode, distribution system, safe-commutation scheme, direct AC/AC converter
Journal Electric Power Components and Systems
Researchers Farshad Khosravi ، Amin Mirzaei naghlbari ، Mahdi Rezvanyvardom


The utilization of a single-phase Quasi-Z-source AC/ AC converter for voltage sag mitigation is introduced in this paper. The suggested topology can compensate voltage sag up to 50%, which is an advantage in comparison with traditional structure, as most voltage sags are not more than 50%. The suggested topology has superior characteristics compared to the conventional topologies and has the following specifications: using the same ground for sharing output and input voltages; functioning in the continuous current mode; employing direct AC/AC converter; applying safe-commutation scheme; the ability to expand of the output voltage range increasing reliability and reducing the harmonics in the output voltage. Because of using safe commutation strategy, as shown in results, no ripple and spike exist in the output voltage. The hardware prototype of the offered structure has magnificently been developed to obtain the experimental results. The experimental results were obtained based on the resistive and inductive loads for a few different sags in the input voltage. The results presented showed good performance despite the simplicity in the control scheme. Moreover, they confirm the good performance of the proposed topology.