(i) Percent and per unit quantities. Single line diagram for a balanced 3-phase
system. (ii) Admittance Model: Branch and node admittances Equivalent admittance
network and calculation of Y bus. Modification of an existing Y bus.
Units: II
(i) Impendence Model: Bus admittance and impedance matrices. Thevenin’s
theorem and Z b Direct determination of Z bus. Modification of an existing bus. (ii)
Symmetrical fault Analysi Transient on a Transmission line, short circuit of a
synchronous machine on no load, short circu of a loaded synchronous machine.
Equivalent circuits of synchronous machine under su transient, transient and steady state
conditions. Selection of circuit breakers, Algorithm for sho circuit studies. Analysis of 3
phase faults.
Units: III
(i) Symmetrical Components: Fortescure theorem, symmetrical component
transformation. Phase shift in star-delta transformers. Sequence Impedances of
transmission lines, Synchronous Machine and Transformers, zero sequence network of
transformers and transmission lines. Construction of sequence networks of power system.
(ii) Fault Analysis:
Analysis of single line to ground faults using symmetrical components, connection of
sequence networks under the fault condition.
Units: IV
Unsymmetrical Fault Analysis: (i) Analysis of line-to-line and double line to
ground faults using symmetrical components, connection of sequence networks under
fault conditions. (ii) Analysis of unsymmetrical shunt faults using bus impedance matrix
method.
Units: V
Load Flow Analysis: Load flow problem, development of load flow equations, bus
classification. Gauss Seidel, Newton Raphosn, decoupled and fast decoupled
methods for load flow analysis. Comparison of load flow methods.