The master's thesis entitled: Improving the Voltage Stability of a Weak Distribution Network using Renewable Energy Resource By researcher Mohammed Qasim Majeed This study was conducted on the electricity distribution network of the western region in Al-Qadisiyah Governorate in Iraq, where the network suffers from voltage deviations, energy losses, and scheduled power outages. This work aims to improve the performance and reliability of the network by improving voltage stability and eliminating scheduled power outages by integrating distributed generation sources based on renewable and sustainable energy resources available in the region and its neighboring areas. The results indicated that the proposed hybrid system generates power that is adaptable to changes in solar radiation and fluctuations in energy demand throughout the day. The results also showed that the proposed hybrid system improves the efficiency of the network by reducing total active energy losses, total reactive energy losses, and voltage deviation index by 77%, 42%, and 87%, respectively. The Homer Pro tool was used to analyze the economic feasibility. The results showed a satisfactory economic feasibility of the project. The thesis was approved by the discussion committee, which consisted of Assistant Professor Dr. Marwa Mohammed Marai (College of Engineering, University of Karbala) as Chairman and the membership of each of Assistant Professor Dr. Hatem Ghadhban Abboud (College of Engineering, University of Karbala) and Assistant Professor Dr. Saif Hussam Abdul Wahid (College of Al-Hussein University) and the membership and supervision of each of Professor Dr. Ali Jaafar Al-Husseini (College of Information Technology Engineering, Al-Zahra University for Girls) and Assistant Professor Dr. Manal Hussein Nower (College of Engineering, University of Karbala)