PJM Transmission Exam Study Guide | Questions with 100% Correct Answers | Verified | Latest Update 2024 | 30 Pages 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? - 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 levels 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 stand 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 for: 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 1 / 3
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 - 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 2 / 3
When ordered a 5% voltage reduction should be taken on: - Correct Answer The Distribution System TOs are required 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 additional 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 after 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
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