SOPD Power System Operations 2

Question 1

What is the primary purpose of Automatic Generation Control (AGC) in an interconnected power system?

Accepted Answer

To balance generation and load while maintaining scheduled tie-line flows

Answer

AGC continuously adjusts generator output to match load changes and maintain scheduled interchange with neighboring control areas.

Question 2

A power system operator observes that the Area Control Error (ACE) is persistently positive. What corrective action should be taken?

Accepted Answer

Decrease generation output within the control area

Answer

Positive ACE indicates the area is generating more than scheduled, so generation must be reduced to restore balance.

Question 3

Which NERC reliability standard governs the Control Performance Standard (CPS) requirements for balancing authorities?

Accepted Answer

BAL-001

Answer

BAL-001 establishes the real power balancing requirements including CPS compliance for balancing authorities.

Question 4

During an N-1 contingency analysis, what does the 'N' represent?

Accepted Answer

The normal pre-contingency system state with all elements in service

Answer

N represents the intact system with all components in service, and N-1 means the loss of any single element.

Question 5

What is the function of a phase angle regulator (PAR) in transmission system operations?

Accepted Answer

To control real power flow on a transmission line by introducing a phase angle shift

Answer

A PAR inserts a controllable phase angle difference between its terminals to regulate active power flow on parallel paths.

(SOPD) System Operator/Power Dispatching Practice Test