Performance Evaluation of BB-QZSI-Based DSTATCOMUnder Dynamic Load Condition
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1
Department of Electrical & Electronics Engineering, Lendi Institute of Engineering & Technology, Vizianagaram, India-535005
2
Department of Electrical Engineering, Odisha University of Technology and Research, Bhubaneswar, India-751029
3
Department of Electrical & Electronics Engineering, Kalam Institute of Technology, Berhampur, India-76100
4
Department of Electrical & Electronics Engineering, National Institute of Science and Technology, Berhampur, India-761008
Power Electronics and Drives 2022;7 (42):43-55
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ABSTRACT
This paper presents the shunt compensation performance of quasi-Z-source inverter (QZSI) and back to back connected QZSIs
(BB-QZSI) to address the power quality (PQ) issues in the three-phase three-wire power utility network (PUN). Generally, these PQ
issues are poor voltage regulation, low power factor (PF), source current distortion, unbalanced voltage, etc. The proposed BB-
QZSI-based distribution static compensator (DSTATCOM) consists of two QZSIs with a common dc-link capacitor. Because the QZSI
could achieve buck/boost conversion as well as DC to AC inversion in a single-stage and the back to back configuration decreases
the system down time cost (if a fault occurs in one QZSI the other can continue the shunt compensation). Particularly, icosϕ control
algorithmcontrol algorithm is implemented to generate proper switching pulses for the switches of DSTATCOM. The effectiveness of
the BB-QZSI is verified through simulation studies over QZSI using MATLAB/Simulink software satisfying the recommended grid code.