Stability Analysis and Design of Variable Step-Size P Algorithm Based on Fuzzy Robust Tracking of MPPT for Standalone/Grid Connected Power System

Daud Sibtain, Muhammad Majid Gulzar, Kamal Shahid, Imran Javed, Sadia Murawwat, Muhammad Majid Hussain*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This research aims to design a modified P algorithm for the efficient tracking of maximum power point (MPPT) for standalone and grid-connected systems. The proposed research work modifies the P algorithm for the dc-dc converter where the fixed step size P algorithm is translated into variable step size with the help of ant colony optimization (ACO) to generate optimal parameters for the PID controller to generate a variable step size in the P algorithm. This variable step size is dependent upon the error that is the difference between the generated power and desired power. By doing this it improves the efficiency of the P algorithm and its limitations are overcome. Furthermore, the PV is extended to connect with a grid where the inverter is controlled by a fuzzy logic controller (FLC) so that the combined structure of variable P and fuzzy helps to achieve MPP efficiently. The robustness of the proposed work is compared with other state-of-the-art controllers to justify the effectiveness of the proposed work. Finally, a stability test of the system is carried out to verify the overall stability of the power system.
Original languageEnglish
Article numbere8986
Number of pages17
JournalSustainability
Volume14
Issue number15
Early online date22 Jul 2022
DOIs
Publication statusPublished - 22 Jul 2022

Keywords

  • perturbation and observation
  • maximum power point tracking
  • fuzzy logic controller
  • variable step size

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