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? (...
PJM Transmission Exam Study Guide | Questions with 100% Correct Answers | Verified | Latest Update 2024 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 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: 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 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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