SOPD Emergency Response & System Restoration Procedures

Question 1

A black‑start resource is defined as a generating unit that can:

Accepted Answer

Start without off‑site power

Answer

A black-start resource is a generating unit or set of units that has the capability to start up independently without requiring an external electrical supply from the grid. These units are critical for system restoration after a widespread blackout, as they can energize portions of the grid to bring other non-black-start generators online.

Question 2

Under‑frequency load shedding (UFLS) is automatically triggered when system frequency drops below:

Accepted Answer

59.3 Hz

Answer

Under-frequency load shedding (UFLS) is an automatic protection scheme designed to prevent a complete system collapse during severe generation-load imbalances. When the system frequency drops to a predetermined critical level, typically around 59.3 Hz, UFLS relays automatically trip pre-selected blocks of load to quickly restore the frequency balance and stabilize the grid.

Question 3

NERC standard that requires each Balancing Authority to have a restoration plan is:

Accepted Answer

EOP‑005

Answer

NERC Reliability Standard EOP-005, titled 'System Restoration from Blackstart Resources,' specifically requires each Balancing Authority and Transmission Operator to develop, maintain, and implement a system restoration plan. This plan outlines the procedures for restoring the bulk electric system following a partial or total blackout, including the use of blackstart resources.

Question 4

During storm damage, operators first prioritize:

Accepted Answer

Isolating faulted segments to secure the system

Answer

During storm damage or any system disturbance, the immediate priority for operators is to isolate the faulted sections of the grid. This action prevents further damage, limits the extent of the outage, and secures the remaining healthy parts of the system, creating a stable foundation for subsequent restoration efforts.

Question 5

A cascading outage is defined as:

Accepted Answer

Sequential protective trips leading to widespread loss

Answer

A cascading outage occurs when the failure of one component or a small number of components triggers a sequence of subsequent failures throughout the power system. This chain reaction typically involves protective relays tripping lines or generators, leading to widespread power loss that extends far beyond the initial fault location.

(SOPD) System Operator/Power Dispatching Practice Test

(SOPD) System Operator/Power Dispatching Practice Test

SOPD Emergency Response & System Restoration Procedures