PJM Transmission Exam Study
Questions and Answers
During System Restoration, what is the optimal Frequency Range? - Correct Answer ️️
-59.75 - 61 Hz
The 500 kV system has normal bus voltages between? - Correct Answer ️️ -500 to
550 kV
When Connecting 2 islands, the operator must match...
PJM Transmission Exam Study Questions and Answers During System Restoration, what is the optimal Frequency Range? - Correct Answer ✔️✔️-59.75 - 61 Hz The 500 k V system has normal bus voltages between? - Correct Answer ✔️✔️-500 to 550 kV When Connecting 2 islands, the operator must match? - Correct Answer ✔️✔️-Voltage, Phase Angle and Frequency What are the Minimum Source Requirements for a 500kV line? (Gen/mile and load/mile) - Correct 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) - Correct Answer ✔️✔️-When expected generation level s fall within 2500 MW of normal operating limits When a thunderstorm is nearing the BES should auto -reclosing be turned on? - Correct Answer ✔️✔️-Yes What does SCADA stand for? - Correct Answer ✔️✔️-Supervisory Control & Data Acquisition What does IROL sta nd for? - Correct Answer ✔️✔️-Interconnection Reliability Operating Limit What does eDART stand for? - Correct Answer ✔️✔️-Dispatcher Application and Reporting Tool What is eDART used for? (Electronic Disp Reporting Tool) - Correct Answer ✔️✔️-It is used f or: Generation Outage Scheduling, Instantaneous Reserve Checks, Generator Reactive Capabilities and to enter and submit switching What direction do VARS flow? - Correct Answer ✔️✔️-From HIGH Voltage to LOW Voltage What direction do MW flow? - Correct 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 Pr icing (LMP) Data - Correct Answer ✔️✔️-4 What one -way communication system is used to disseminate info to local call centers? - Correct Answer ✔️✔️-All-Call The 3 categories of messages issued by PJM All -Call all EXCEPT: 1) Operational 2) Informational 3) Conflicting Interchange Values 4) Emergency Procedures - Correct Answer ✔️✔️-3 When should, transmission outages should be submitted to PJM to avoid cancellation and to be considered "on time?' - Correct Answer ✔️✔️-First day of Month Prior to the Outage What report will be requested by PJM when a Max Generation Alert is issued? - Correct Answer ✔️✔️-Supplementary Status Report (SSR) The loss of a large generation unit on the PJM system can be detected by monitoring: - Correct Answer ✔️✔️-Frequency and PJM Area Control Error (ACE) The PJM system is operated such that the contingency flow is less than the: - Correct Answer ✔️✔️-Emergency Rating When ordered a 5% voltage reduction should be taken on: - Correct Answer ✔️✔️-The Distribution System TOs are requi red to report "Hot Line Work" on what voltage levels? - Correct Answer ✔️✔️-345 kV and Above Load dump rating of an EHV line is determined by? - Correct Answer ✔️✔️-115% of the facility's 4 hour Emergency Rating During System Restoration, will closing addi tional tie lines increase the strength & stability of an interconnected area? - Correct Answer ✔️✔️-Yes Which of the following factors influence load forecast (3)? 1) Weather 2) Temperature 3) Reactive Reserves 4) Day of the week - Correct Answer ✔️✔️-1, 2, 4 During system restoration, what is the voltage range the system should be kept between? - Correct Answer ✔️✔️-90% and 105% maintain voltage profile between for system restoration PJM will coordinate and direct all restoration lines of what voltage levels? - Correct Answer ✔️✔️-500kV and above How much load would you dump to increase the frequency by 1 Hz (percentage range)? - Correct Answer ✔️✔️-6-10% Generation is disconnected aft er 5 seconds, when the frequency: - Correct Answer ✔️✔️-
Drops below 57.5Hz How much of the total Dynamic Reserve should be used on Under Frequency relay load? - Correct Answer ✔️✔️- During System Restoration, capacitor banks should be kept off until how mu ch of the load is restored? - Correct Answer ✔️✔️-40% Would PJM assume Frequency Control when the control of an interconnected area is too burdensome for any Local Control Center? - Correct Answer ✔️✔️-Yes Operator receiving an All -Call message should stat e the following before playback of the message? - Correct Answer ✔️✔️-Name and Company Dynamic Reserves consist of: - Correct Answer ✔️✔️-Governor Reserve and Load that has been restored with under frequency relays
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