8. Transmission and Distribution Analysis
NCEES Topic 8 (8–12 questions). HV/MV/LV — voltage drop, regulation, PF correction, power quality, fault current, power flow, stability.
Chapters
A. Voltage drop
Feeder voltage drop calculations, ANSI C84.1 limits, conductor sizing.
B. Voltage regulation and support
Transformer voltage regulation, transmission-line modeling (ABCD parameters, Ferranti effect, SIL).
C. Power factor correction
Capacitor sizing for PF correction, kVAR calculation, economic dispatch of reactive power.
D. Power quality
Harmonics + IEEE 519 limits, voltage sags + IEEE 1159 + ITIC curve, mitigation strategies.
E. Fault current analysis
Three-phase + unbalanced (line-to-ground, line-to-line, double-line-to-ground) fault calculations.
G. Power flow
Y-bus formulation, Newton-Raphson power flow, optimal power flow (OPF) + SCED.
H. Power system stability
Transient stability (equal-area criterion), voltage stability (PV curve), frequency response (AGC), small-signal stability (PSS).