Performance Evaluation of BB-QZSI-Based DSTATCOMUnder Dynamic Load Condition

Mangaraj, Mrutyunjaya; Sabat, Jogeswara; Barisal, Ajit Kumar; Patra, Anil Kumar; Chahattaray, Ashok Kumar

doi:10.2478/pead-2022-0004

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 BBQZSI-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, icos ϕ 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.

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Performance Evaluation of BB-QZSI-Based DSTATCOMUnder Dynamic Load Condition

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