Load flow analysis is the most critical investigation done on an electric power system to determine the operation condition of the system at steady state. This paper involves the analysis of a 3-Bus and 5-Bus power system model using the ETAP software. This research work is based on the analysis of voltage magnitude, active power flow, reactive power flow, transformer loading, and transmission line analysis at different operating conditions. Buses, Transformers, Loads, Generators and Transmission lines are created in ETAP software to form the electrical network. The load flow analysis of the model is done by using the Newton-Raphson approach due to its fast convergence and higher accuracy. Several operating scenarios including the Normal Operating Condition, Transformer Overload, and Increased Load conditions were studied, and the results indicate that although the system works efficiently at normal operating conditions, it will face voltage drop, transformer overload, and power loss when loading increases.

Keywords: Load Flow Analysis, ETAP, Power System, Bus System, Voltage Profile, Transformer Loading, Power Flow.