24-04-2012, 10:45 AM
Power System Analysis & Stability
1) Representation of Power system Components: One line diagram, impedance diagram. Per unit system, per unit impedance diagram of power system, Formation of Y bus by rule of inspection. 4 Hrs.
2) Symmetrical 3 - Phase faults: Transients on a transmission line, Short-Circuit currents and the reactance of synchronous machines on no load and on load, selection of circuit breaker ratings. 3 Hrs.
3) Symmetrical components: Analysis of unbalanced load against balanced 3-phase supply, resolution of unbalanced phasors into their symmetrical components. Phase shift of symmetrical components in star-delta transformer bank. Power in terms of symmetrical components. Sequence impedances and sequence networks. Sequence impedance of power system elements (alternator, transformer and transmission line), positive, negative and zero sequence networks of power system elements.
4) Unsymmetrical faults: L-G, L-L, L-L-G faults on an unbalanced alternator without and with fault impedance. Unsymmetrical faults on a power system without and with fault through impedance. 10 Hrs.
5) Load Flow Studies: Introduction, Bus Admittance Matrix, Power flow equations, Classification of buses, Gauss-Seidal Method – Algorithm for PQ and PV buses, Acceleration of convergence, Newton-Raphson Method in polar coordinates, Fast Decoupled load flow method, Comparison of Load Flow Methods. 12 Hrs
6) Steady State Stability Studies: Power angle equation, Equal area criterion of stability and its application. 5 Hrs.
7) Transient Stability Studies: Swing equation, Numerical solution of Swing Equation – Point-by-point method, Modified Euler’s method, Runge-Kutta 4th order method,