Power Generation & Transmission Flashcards
7 cards from real AEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Power Generation & Transmission flashcards as text
What is the 'N-1 reliability criterion' used in transmission planning?
Answer: The grid must survive the loss of any single transmission element without interrupting customer service
The N-1 criterion requires that the system remain stable and serve all load even after losing any single major element (line, transformer, or generator).
What is 'pumped-storage hydropower' and how does it benefit a transmission grid?
Answer: Hydro plants that pump water uphill at night to store energy and generate during peak hours
Pumped-storage facilities use off-peak surplus electricity to pump water to an upper reservoir, then release it through turbines during peak demand, acting as large-scale energy storage.
In power plant thermodynamics, what does the Rankine cycle describe?
Answer: The thermodynamic cycle used by steam power plants converting heat to work
The Rankine cycle describes how steam power plants convert thermal energy into mechanical work using a boiler, turbine, condenser, and pump.
What is 'tie-line bias control' in the context of interconnected grid operations?
Answer: A control mode that corrects area control error by adjusting generation to maintain scheduled tie-line flow and frequency
Tie-line bias control adjusts a control area's generation based on both deviation from scheduled interchange and frequency error, so each area shares responsibility for frequency regulation.
Which NERC region does AEP's transmission system primarily operate within?
Answer: RFC and SERC
AEP's footprint spans the ReliabilityFirst Corporation (RFC) and SERC Reliability Corporation regions, covering states from Michigan to Louisiana.
What is a 'thermal rating' for a transmission line?
Answer: The maximum current a line can carry before conductor temperature exceeds safe sag limits
Thermal ratings define the maximum steady-state or emergency current a line can carry without the conductor sagging dangerously close to objects below due to heat-induced expansion.
What role does AEP play as a member of the PJM Interconnection?
Answer: AEP is a transmission owner and load-serving entity subject to PJM's market and reliability rules
As a PJM member, AEP owns and operates transmission assets under PJM's tariff, participates in capacity and energy markets, and must comply with PJM's reliability directives.