04-05-2012, 03:21 PM
POWER SYSTEM ANALYSIS
8th semester.txt (Size: 19.6 KB / Downloads: 41)
Module 1
Power System Model: Representation – Single Line Diagram – per unit system – per unit impedance diagram – network model formulation – bus admittance matrix – formation of Y bus and Z bus using singular transformation – symmetrical components – sequence impedance and networks
Module 2
Power Flow Studies: Load flow problem – Gauss Siedal method – Newton Raphson method – algorithm for load flow solution – handling of voltage controlled buses, off nominal transformer ratios and phase shifting transformers
Module 3
Economic Load Dispatch: System constraints – Economic dispatch neglecting losses – optimal load dispatch including transmission losses – physical interpretation of co ordination equations – exact transmission loss formulae – modified co ordination equation – automatic load dispatching
Module 4
Symmetrical and unsymmetrical short circuit analysis: Different types of faults in power systems – symmetrical fault analysis – selection of circuit breakers – use of reactors Unsymmetrical faults – analysis of single line to ground, line to line and double line to ground faults in power system – analysis of unsymmetrical fault using Z bus.
Module 5
Stability Analysis: Swing equation – power angle equation and power angle curve – inertia constant – steady state stability - transient stability – equal area criterion – application – numerical solution of swing equation – critical clearing time and angle – effect of clearing time on stability –methods of improving system stability – modified Euler’s method – Rangakutta method – application to the solution of swing equation and computational algorithms
Switchgear: Circuit breaker – basic principle of operation – arc phenomenon – initiation and maintenance of arc - arc interruption methods – arc voltage and current waveform in AC circuit breaking – re-striking and recovery voltage – current chopping – DC breakers – rating of circuit breakers - breaking capacity – making capacity – short time rating – working principle and important features of oil CB, minimum oil CB, air blast CB, vacuum CB and SF6 CB – auto high speed re-closing.