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NERC Interconnection and Balancing Operations Flashcards

6 cards from real NERC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. The North American power grid is divided into how many major synchronous interconnections?

    Answer: Four

    North America has four major synchronous interconnections: Eastern, Western, Texas (ERCOT), and Quebec.

  2. Under NERC TOP-002, Transmission Operators must assess their systems against which planning events during the operating horizon?

    Answer: P0 through P7 planning events as defined in TPL-001

    TOP-002 requires Transmission Operators to assess system conditions against P0 through P7 contingency categories, matching the transmission planning standards.

  3. What is a 'Special Protection System' (SPS) or 'Remedial Action Scheme' (RAS) in power system operations?

    Answer: An automated scheme designed to detect system conditions and take pre-planned corrective actions to maintain reliability

    An SPS/RAS is an automated scheme that detects abnormal system conditions (such as line trips or overloads) and automatically takes corrective actions like generation tripping or load shedding.

  4. Under NERC IRO-010, what information must Reliability Coordinators provide to neighboring RCs?

    Answer: Current operating status and anticipated reliability issues to support wide-area situational awareness

    IRO-010 requires RCs to share real-time system status and anticipated reliability issues with adjacent RCs to maintain wide-area situational awareness.

  5. What is the purpose of NERC's 'Transmission Loading Relief' (TLR) procedure?

    Answer: Coordinating curtailment of interchange schedules to relieve overloaded transmission flowgates

    TLR is a coordinated procedure where the Reliability Coordinator directs curtailment of interchange transactions to relieve thermal or stability constraints on transmission flowgates.

  6. NERC's 'Cold Weather Preparedness' standards (EOP-012) were developed primarily in response to:

    Answer: Generator and fuel supply failures during extreme cold weather events including Winter Storm Uri in 2021

    EOP-012 was accelerated following Winter Storm Uri (February 2021), which exposed widespread generator weatherization and fuel supply failures in cold weather.