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PJM Transmission Study Guide Exam Questions and Answers 100% Solved
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PJM Transmission Study Guide Exam Questions and Answers 100% Solved During System Restoration, what is the optimal Frequency Range? - 59.75 - 61 Hz The 500 kV system has normal bus voltages between? - 500 to 550 kV When Connecting 2 islands, the operator must match? - Voltage, Phase Angle and...

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  • November 2, 2024
  • 41
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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©NINJANERD 2024/2025. YEAR PUBLISHED 2024.
PJM Transmission Study Guide Exam

Questions and Answers 100% Solved


During System Restoration, what is the optimal Frequency Range? -

✔✔59.75 - 61 Hz

The 500 kV system has normal bus voltages between? - ✔✔500 to 550 kV

When Connecting 2 islands, the operator must match? - ✔✔Voltage, Phase

Angle and Frequency

What are the Minimum Source Requirements for a 500kV line? (Gen/mile

and load/mile) - ✔✔30 MW Gen/mile of energized 500 kV and 20 MW

Load/mile of energized 500 kV

When will PJM issue a Minimum Generation Alert? (how many MW under

normal operating limits) - ✔✔When expected generation levels fall within

2500 MW of normal operating limits

When a thunderstorm is nearing the BES should auto-reclosing be turned

on? - ✔✔Yes

What does SCADA stand for? - ✔✔Supervisory Control & Data Acquisition

,©NINJANERD 2024/2025. YEAR PUBLISHED 2024.
What does IROL stand for? - ✔✔Interconnection Reliability Operating Limit

What does eDART stand for? - ✔✔Dispatcher Application and Reporting

Tool

What is eDART used for? (Electronic Disp Reporting Tool) - ✔✔It is used

for: Generation Outage Scheduling, Instantaneous Reserve Checks,

Generator Reactive Capabilities and to enter and submit switching

What direction do VARS flow? - ✔✔From HIGH Voltage to LOW Voltage

What direction do MW flow? - ✔✔From HIGH Phase Angle to LOW Phase

Angle

Which of the following factors are NOT used in forecasting load?



1) Weather Forecast

2) Historical Load Forecast

3) Historical Weather Data

4) Locational Marginal Pricing (LMP) Data - ✔✔4

What one-way communication system is used to disseminate info to local

call centers? - ✔✔All-Call

The 3 categories of messages issued by PJM All-Call all EXCEPT:

,©NINJANERD 2024/2025. YEAR PUBLISHED 2024.
1) Operational

2) Informational

3) Conflicting Interchange Values

4) Emergency Procedures - ✔✔3

When should, transmission outages should be submitted to PJM to avoid

cancellation and to be considered "on time?' - ✔✔First day of Month Prior

to the Outage

What report will be requested by PJM when a Max Generation Alert is

issued? - ✔✔Supplementary Status Report (SSR)

The loss of a large generation unit on the PJM system can be detected by

monitoring: - ✔✔Frequency and PJM Area Control Error (ACE)

The PJM system is operated such that the contingency flow is less than

the: - ✔✔Emergency Rating

When ordered a 5% voltage reduction should be taken on: - ✔✔The

Distribution System

TOs are required to report "Hot Line Work" on what voltage levels? -

✔✔345 kV and Above

Load dump rating of an EHV line is determined by? - ✔✔115% of the

facility's 4 hour Emergency Rating

, ©NINJANERD 2024/2025. YEAR PUBLISHED 2024.
During System Restoration, will closing additional tie lines increase the

strength & stability of an interconnected area? - ✔✔Yes

Which of the following factors influence load forecast (3)?



1) Weather

2) Temperature

3) Reactive Reserves

4) Day of the week - ✔✔1, 2, 4

During system restoration, what is the voltage range the system should be

kept between? - ✔✔90% and 105% maintain voltage profile between for

system restoration

PJM will coordinate and direct all restoration lines of what voltage levels? -

✔✔500kV and above

How much load would you dump to increase the frequency by 1 Hz

(percentage range)? - ✔✔6-10%

Generation is disconnected after 5 seconds, when the frequency: -

✔✔Drops below 57.5Hz

How much of the total Dynamic Reserve should be used on Under

Frequency relay load? - ✔✔

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