Title: Robust power conditioning system based on LCL-type quasi-Y-source inverter for grid connection of photovoltaic arrays

Authors: Navid Rasekh; Majid Hosseinpour; Abdolmajid Dejamkhooy; Adel Akbarimajd

Addresses: Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran ' Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran ' Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran ' Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract: Design of a power conditioning system is a matter of concern in LCL-type grid-connected systems. The governing standard on power delivery has limited the total harmonic distortion (THD) of the injected power into the grid. Both stability of the system and the power quality should be considered in the control of grid-tied systems. In this study, a grid-connected system consists of photovoltaic arrays, inverter, and LCL filter has been considered for investigation. The proportional resonant (PR) controller is applied in the control system. A systematic procedure has been proposed for tuning the PR controller in converter side current control (CSCC) of the grid-tied inverter. The proposed control scheme for PV-based power conditioning system aims at suppressing contents of injected current harmonics, enhancing the power quality, and ensuring the system stability. Besides, the robustness of the proposed power conditioning system against grid voltage and grid impedance variation is investigated. Simulations are carried out in MATLAB/Simulink environment to verify the credibility of the proposed approach.

Keywords: quasi-Y-source inverter; converter side current control; CSCC; PR controller; LCL filter.

DOI: 10.1504/IJAAC.2021.118526

International Journal of Automation and Control, 2021 Vol.15 No.6, pp.692 - 709

Received: 14 Sep 2019
Accepted: 28 Feb 2020
Published online: 28 Oct 2021 *

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