Cover
Vol. 20 No. 2 (2024)

Published: December 31, 2024

Pages: 284-297

Original Article

Lyapunov Function Control Strategy for a Three-Phase Grid-Tied LCL Filtered Quasi Z-Source Inverter (qZSI)

Ali Kadhim Abdulabbas 1 Shafaa Mahdi Salih
1Electrical Engineering Department, University of Basrah, Basra, Iraq
History
  • Received: August 4, 2024
  • Revised: September 3, 2024
  • Accepted: September 17, 2024
  • Available Online: November 1, 2024
DOI

https://doi.org/10.37917/ijeee.20.2.25

Abstract

The presented research introduces a control strategy for a three-phase grid-tied LCL-filtered quasi-Z-source inverter (qZSI) using a Lyapunov-function-based method and cascaded proportional-resonant (PR) controllers. The suggested control strategy ensures the overall stability of the closed-loop system and eliminates any steady-state inaccuracy in the grid current. The inverter current and capacitor voltage reference values of qZSI are created by the utilization of cascaded coupled proportional-resonant (PR) controllers. By utilizing synchronous reference frame and Lyapunov function- based control, the requirement to perform derivative operations and anticipate inductance and capacitance are avoided, resulting in achieving the goal of zero steady-state error in the grid current. The qZSI can accomplish shoot-through control by utilizing a simple boost control method. Computer simulations demonstrate that the suggested control strategy effectively achieves the desired control objectives, both in terms of steady-state and dynamic performance.

Keywords

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