,PJM TRANSMISSION EXAM STUDY (PJM
TRANSMISSION EXAM STUDY MATERIAL AS
OF 6/30/2024) QUESTIONS CORRECTLY
ANSWERED!!
During System Restoration, what is the optimal Frequency Range? Answer -
59.75 - 61 Hz
The 500 kV system has normal bus voltages between? Answer - 500 to 550 kV
When Connecting 2 islands, the operator must match? Answer - Voltage,
Phase Angle and Frequency
What are the Minimum Source Requirements for a 500kV line? (Gen/mile and
load/mile) Answer - 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) Answer - 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?
Answer - Yes
What does SCADA stand for? Answer - Supervisory Control & Data Acquisition
,What does IROL stand for? Answer - Interconnection Reliability Operating Limit
What does eDART stand for? Answer - Dispatcher Application and Reporting
Tool
What is eDART used for? (Electronic Disp Reporting Tool) Answer - It is used
for: Generation Outage Scheduling, Instantaneous Reserve Checks, Generator
Reactive Capabilities and to enter and submit switching
What direction do VARS flow? Answer - From HIGH Voltage to LOW Voltage
What direction do MW flow? Answer - 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 Answer - 4
What one-way communication system is used to disseminate info to local call
centers? Answer - All-Call
The 3 categories of messages issued by PJM All-Call all EXCEPT:
When should, transmission outages should be submitted to PJM to avoid
cancellation and to be considered "on time?' Answer - First day of Month Prior
to the Outage
What report will be requested by PJM when a Max Generation Alert is issued?
Answer - Supplementary Status Report (SSR)
The loss of a large generation unit on the PJM system can be detected by
monitoring: Answer - Frequency and PJM Area Control Error (ACE)
The PJM system is operated such that the contingency flow is less than the:
Answer - Emergency Rating
When ordered a 5% voltage reduction should be taken on: Answer - The
Distribution System
TOs are required to report "Hot Line Work" on what voltage levels? Answer -
345 kV and Above
Load dump rating of an EHV line is determined by? Answer - 115% of the
facility's 4 hour Emergency Rating
During System Restoration, will closing additional tie lines increase the strength
& stability of an interconnected area? Answer - Yes
Which of the following factors influence load forecast (3)?
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