Robust and reliable power supply is a backbone of any industrial society. This module provides necessary analytical tools required to assess the performance of existing electric power systems under various operating conditions and also to plan the future expansion of such systems. In addition, it introduces various protection schemes employed in the industry. It adequately prepares students seeking employment in the electric energy related industries. The topics covered are: Modeling of power systems: bus admittance and bus impedance matrices, network building algorithms; Load flow studies: problem formulation, computer solution techniques, applications; Fault analysis: symmetrical components, sequence impedance networks, symmetrical and unsymmetrical faults; Protection: components, relay coordination; Protection of distribution systems; Differential, and earth fault protection systems.