An improved model and performance analysis for grid-connected photovoltaic system in Oman

Omar A Al-Shahri, Firas B Ismail, Nizar F O Al-Muhsen, Ammar Al-Bazi, M A Hannan

Research output: Contribution to journalArticlepeer-review


The PV systems' sources are environmentally friendly, but at the same time, they are constantly changing with time. When evaluating solar energy resources, it is necessary to consider the variability and effects of different environmental operation parameters like solar irradiances, ambient temperature, and module temperature. The study introduces a method to simulate an existing photovoltaic system using a mathematical model that permits intelligent strategies to optimise the efficiency and adjust the most effective operational parameters for the solar energy systems. A mathematical analysis for the data framework, including correlation and regression coefficients, was calculated to identify and chart the relationships between the system's most influential parameters and the generated power from the PV system. An improved mathematical model was built with the most influential parameters. The improved model was simple, accurate, and based on the loss ratio by eliminating the unknown parameters. The system's efficiency was analysed using an existing data framework-recorded hourly from 1 st January 2017 to December 2018 for a grid-connected photovoltaic system installed in the south of Oman. The results showed that the most influential parameters on the efficiency were the module's solar irradiance and surface temperature. The operating parameters such as ambient temperature, wind speed, and air humidity had a negligible effect on the generated power compared to the cell temperatures and solar radiation. The dissipation factor was used in the new output current and voltage equations to stimulate the output power of the PV model. The improved model was validated in a MATLAB Simulink and showed a more promising output with a lower RMSE of 5 %.

Original languageEnglish
Article numbere12237
Number of pages14
Issue number12
Early online date12 Dec 2022
Publication statusPublished - Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 The Author(s). This is an open access article under the CC BY-NC-ND license (

Funding Information:
Dr Firas B Ismail Alnaimi was supported by Universiti Tenaga Nasional [ J510050002 -BOLDRefresh2025-Centre of Excellence].


  • System efficiency analysis
  • Data analysis
  • Energy
  • Validation of the established model
  • Mathematical model
  • Solar energy systems


Dive into the research topics of 'An improved model and performance analysis for grid-connected photovoltaic system in Oman'. Together they form a unique fingerprint.

Cite this