Equal Area Criterion in Power System: In a system where one machine is swinging with respect to an infinite bus, it is possible to study transient stability by means of a simple Equal Area Criterion…
Transient Stability in Power System: Transient Stability in Power System - It has been shown already that the dynamics of a single synchronous machine connected to infinite bus bars is governed by the nonlinear differential…
Steady State Stability in Power System: The steady state stability limit of a particular circuit of a power system is defined as the maximum power that can be transmitted to the receiving end without loss…
Single Machine Infinite Bus in Power System: Figure 12.14 is the circuit model of a Single Machine Infinite Bus in Power System through a line of reactance Xe. In this simple case From Eq. (12.29b)…
Node Elimination Technique in Power System: In stability studies, it has been indicated that the buses to be considered are those which are excited by the internal machine voltages (transient emf's) and not the load…
Power Angle Equation of Synchronous Machine: Power Angle Equation of Synchronous Machine - In solving the swing equation (Eq. (12.10)), certain simplifying assumptions are usually made. These are: Mechanical power input to the machine (Pm)…
Dynamics of Synchronous Machine: The Kinetic Energy of the Rotor at Dynamics of a Synchronous Machine is where J = rotor moment of inertia in Kg-m2 ωsm = synchronous speed in rad (mech)/s But where P…
What is Power System Stability?: The stability of an interconnected power system is its ability to return to normal or stable operation after having been subjected to some form of disturbance. Conversely, instability means a…
Bus Impedance Matrix Method for Analysis of Unsymmetrical Shunt Faults: Bus Impedance Matrix Method of fault analysis, given for symmetrical faults  can be easily extended to the case of unsymmetrical faults. Consider for example an…
Open Conductor Faults: An open conductor faults is in series with the line. Line currents and series voltages between broken ends of the conductors are required to be determined. Figure 11.19 shows currents and voltages…
