(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.