PJM Transmission Test Questions with Correct Answers 2024 When is Manual Load Dump Warning issued? - Correct Answer available primary reserve capacity is less than the largest operating generator or the loss of a transmission facility jeopardizes reliable operations after all other possible measures are taken to increase reserve Why is a Voltage Reduction used? - Correct Answer PJM dispatcher issues the order for a 5% voltage reduction on the DISTRIBUTION system. Used to increase transmission system voltages by lowering the distribution system voltages When is Primary Reserve Warning issued? - Correct Answer The purpose of the Primary Reserve Warning is to warn members that the available primary reserve is less than required and present operations are becoming critical. It is implemented when available primary reserve capacity is less than the primary reserve requirement, but greater than the synchronized reserve requirement.At what Frequency (Hz) do generators trip offline due to under frequency? - Correct Answer 57.5 Hz When is Minimum Generation Alert issued? - Correct Answer Minimum Generation Alert is implemented when the expected generation level is within 2,500 MW of normal minimum energy limits.Under normal conditions, when is a generator considered Fuel Limited Generation? How many hours of run time left? - Correct Answer Generally, any fuel or resource restricted unit (< 72 burn hours at max capacity, see Section
- of this manual) should be classified as Fuel Limited Generation.
What category should Furl Limited Resources be placed in during a Cold or Hot Weather Alert? - Correct Answer Units bid to the PJM Market when Conservative Operations/Cold or Hot Weather Alert have been declared and PJM Dispatch requests Fuel Limited Resources be placed into the Maximum Emergency Generation Category.At what projected temperature will PJM issue a Hot Weather Alert? - Correct Answer 90 degrees F or more 1 / 2
What locations does PJM monitor for Solar Magnetic Disturbances? How many amps measurement is required? - Correct Answer Solar Magnetic Disturbances geomagnetic storm is detected that produces a DC measurement at Missouri Avenue in Atlantic City and/or Meadow Brook Station near Winchester, Virginia at a magnitude greater than 10 amps and PJM dispatcher confirms that this measurement is a result of a severe geomagnetic storm by checking additional sources of information.At what PJM Security threat level will PJM consider staffing selected substations for communications? - Correct Answer PJM SECURITY RED / Severe
- Consider staffing selected substations for communications
- Consider staffing critical combustion turbine sites
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How many hours can the Emergency Mandatory Load Management Reductions system be implemented per day? - Correct Answer Emergency Mandatory Load Management Reductions Are available from June through September, interruptions may be called for up to six hours in duration between the hours of 12:00 (Noon) to 20:00 (08:00 PM) on weekdays, other than PJM holidays. From October through May, interruptions may be called for up to six hours in duration between the hours of 14:00 (02:00 PM) to 22:00 (10:00 PM) on weekdays, other than PJM holidays.What % of load should you drop to increase frequency by 1 Hz - Correct Answer 6% of load What % of load should you drop to increase frequency by 1.5 Hz - Correct Answer 9% of load (6% = 1 Hz so you need another 0.5 Hz = 3%, 1.5 Hz = 9%) What is the maximum % of UFR load can you have in your dynamic reserves? - Correct Answer 50%. • Know how to calculate dynamic reserves given the steam, CT and Hydro capacity values. The important part is your dynamic reserves can only have max of 50% UFR load.What contingency level does PJM operate its system to? - Correct Answer PJM operates its system to contingency levels of STE (Short Term Emergency) ratings During System Restoration, how much % of load forecast is required for regulation requirement for valley and peak? - Correct Answer 2% regulation is required during system restoration, during normal