**1.2 Relevance and important of research**

The idea of the research is to investigate the real causes of the blackouts and frequent outages in energy supply to consumers in Western region of Libyan power system grid. It is possible to achieve this goal by analyzing the performance of the power plants in Western region of Libya. Which are Alzawia Combined Cycle Power Plant" Alzawia CCPP" with a total installed capacity of 1440 MW and Western Mountain power plant with a total installed capacity of 600 MW [4]. These power plants represent more than a quarter of the energy produced in Libya. Therefore, focusing the study on these stations may help find suitable solutions for the electric company.
