NERC Protection and Control Systems Flashcards

What does NERC standard FAC-001 require of transmission owners?

Answer: Establishment and documentation of facility ratings methodology

FAC-001 requires transmission owners and generator owners to document their methodology for establishing transmission and generation facility ratings.

A 'Sudden Pressure Relay' on a power transformer is primarily designed to protect against:

Answer: Internal transformer faults that produce a rapid rise in gas or oil pressure

Sudden pressure relays detect rapid pressure rises inside transformer tanks caused by internal arcing faults, providing fast fault clearing.

NERC PRC-002 requires disturbance monitoring equipment (DME) on the BES primarily to:

Answer: Capture high-resolution data during disturbances to support post-event analysis

PRC-002 requires DME (fault recorders, DFRs, PMUs) to capture event data for post-disturbance analysis and reliability studies.

Which protection philosophy uses two independent protection systems on a single transmission element to ensure fault clearing if one system fails?

Answer: Primary/backup redundancy

Primary/backup redundancy uses two independent protection systems so that if the primary system fails, the backup still clears the fault.

Under NERC standards, DC battery systems in substations are considered part of the protection system because:

Answer: They are the energy source required to operate relays and trip breakers during AC system disturbances

DC battery systems power the relays, control circuits, and breaker trip coils that must operate during AC system faults when station AC power may be compromised.

What is the primary purpose of NERC standard MOD-032?

Answer: Modeling data requirements for steady-state and dynamic simulations used in reliability studies

MOD-032 establishes data requirements for steady-state and dynamic models submitted to planners for BES reliability studies.