This report focuses on modelling a balanced three-phase power system using the per-unit system and validating results through simulations with PSCAD (Power System Computer Aided Design) and PSS/E (Power System Simulation for Engineers). The system's one-line diagram is analysed, selecting a common base of 100 MVA and 22 kV at the generator side. Each group is assigned different load capacities with varying power factors to introduce realistic diversity. The report covers the identification of the electrical network sections, calculation of base voltage values for each section, and the determination of per-unit values for components under steady-state conditions. The per-unit system is employed to simplify calculations and facilitate comparisons of system parameters across different voltage levels. A simulation study is conducted using PSCAD and PSS/E to verify the accuracy of the per-unit system results and observe the system's dynamic behaviour. The outcomes highlight the effectiveness of the per-unit system in analysing complex power systems, while the simulation results provide validation of the theoretical calculations. This report is about generation control and transmission systems. It focuses on analysing the steady state of a power system by controlling the active and reactive power to maintain the voltage and frequency of the power grid though simulations with PSCAD (Power System Computer Aided Design). The system’s Single Line Diagram is taken from the Assignment A and modify the load capacities, generator controlling method and transmission parameters used. This report covers the analysing of the power system in terms of voltage and frequency regulations using the active and reactive power control of the synchronous generators. We also calculate the ABCD parameters of the modified power system for the nominal circuit “π” and determine the sending end line voltage and current including the percentage of voltage regulation for a medium transmission line model. Each group is assigned different load capacities with varying power factors to introduce realistic diversity. The outcomes highlight the behaviour of the system in regulating the voltage and frequency in power systems, while the simulation results provide validation of the theoretical calculations. This report investigates generation control and transmission systems, focusing on the analysis of a power system's steady-state performance. The study emphasizes controlling active and reactive power to maintain voltage stability and frequency regulation in the power grid, utilizing simulations conducted in PSCAD (Power System Computer-Aided Design). The system's Single Line Diagram, which taken from Assignment A, has been modified by adjusting load capacities, generator control methods, and transmission parameters. The report explores voltage and frequency regulation through active and reactive power control of synchronous generators. Additionally, it calculates the ABCD parameters of the modified power system for the nominal "π" circuit model. Using these parameters, the sending-end line voltage, current, and the percentage of voltage regulation for a medium transmission line model are determined. Each group in the assignment has been allocated unique load capacities with varying power factors to simulate realistic system diversity. The outcomes highlight the system's behaviour in achieving effective voltage and frequency regulation. The simulation results will thoroughly be analysed and compared with theoretical calculations In this assignment, we explored the critical aspects of generation control and transmission systems, focusing on the steady-state behaviour of a power system. By utilizing PSCAD simulations, we successfully demonstrated the control of active and reactive power to regulate the voltage and frequency of the power grid. The modifications made to the Single Line Diagram, including adjustments to load capacities, generator control methods, and transmission parameters, provided a comprehensive understanding of system behaviour under various conditions. The calculated ABCD parameters for the nominal "π" circuit model, along with the derived sendingend voltage, current, and voltage regulation percentage, validated the theoretical principles governing medium transmission line models. Simulations further reinforced the effectiveness of synchronous generator controls in managing voltage and frequency fluctuations, ensuring system stability. The assignment also underscored the importance of diverse load profiles with varying power factors in realistic power system analysis. The insights gained from the simulation results and their alignment with theoretical expectations highlight the critical role of advanced tools like PSCAD in studying and optimizing power systems. Overall, this task provided a robust foundation in understanding and addressing the challenges of voltage and frequency regulation in power systems.