EE458

POWER SYSTEM DYNAMICS


Stability considerations - Dynamic modeling requirements- angle stability – equal area criterion-Critical fault clearing time and angle-numerical integration techniques.


Synchronous machines - Park’s transformation – flux linkage equations – formulation of normalized equations – state space current model – simplified models of the synchronous machine – turbine, Generator – steady state equations and phasor diagrams.


Dynamics of Synchronous machines - Mechanical relationships – electrical transient relationships – adjustment of machine models – Park’s equation in the operational form.


Induction motor equivalent circuits and parameters - free acceleration characteristics – dynamic performance – effect of three phase short circuit and unbalanced faults.


Transient and dynamic stability distinction – linear model of unregulated synchronous machine and its oscillation modes – distribution of power impacts – effects of excitation on stability – supplementary stabilization signals.


1. Elgerd, O.I.,'Electric Energy Systems Theory', TMH, New Delhi, 2nd edition ,1991 .

2. Anderson, P.M. and Fouad, A.A.,'Power System Control and Stability', Galgotia Publ., New Delhi, 2003.

3. Krause, P.C. , ‘Analysis of Electric Machinery' McGraw-Hill International Editions, 2000.