7. Electric Power Devices
NCEES Topic 7 (8–12 questions). Transformers, capacitors, energy storage, alternative generation, testing.
Chapters
Chapter
A. Transformers
Transformer action, autotransformers, 3-winding, three-phase connections, parallel operation, tap changers, Scott connection.
Chapter
B. Capacitors
Capacitor energy storage, dielectric materials, capacitor banks for grid applications.
Chapter
C. Electrical energy storage (battery, ultra-capacitor)
Lithium-ion + flow batteries, long-duration storage, hydrogen fuel cells.
Chapter
D. Alternative power generation (PV, wind)
PV system design, wind power curves, wind turbine types 1-4.
Chapter
E. Testing
Transformer equivalent-circuit tests (open-circuit + short-circuit), test data → equivalent-circuit parameters.