PJM Generation Dispatch Exam - Questions and Answers (Complete Solutions)

Document Content and Description Below

PJM Generation Dispatch Exam - Questions and Answers (Complete Solutions) Which of the following statements is correct concerning PJM assuming frequency control of the restoration process? A) PJM as... sumes control once an external transmission tie has been established. B) Once an Area Control Error can be calculated, PJM will assume control. C) Whenever it becomes too much of a burden for any one Transmission Owner within the RTO D) Whenever the Transmission Owners within the RTO agree to let PJM control the process. During black start restoration, priority access to cranking power should be given to: A) Hot units that can return to service immediately. B) Combustion turbines in areas where the initial disturbance occurred C)Units with black start capability D) Hydro Units During a restoration, if you are presented with the opportunity to re-connect with the Eastern Interconnection, you should: A)Not pursue this opportunity because you may cause the Eastern Interconnection to become unstable. B) Pursue this opportunity only when you have adequate Dynamic Reserves on your system C) Pursue this opportunity as quickly as possible D) Pursue this opportunity only if you need cranking power for your generating unity Complete (Total System) Blackouts are characterized by which of the following? 1 - Most common type of blackout 2 - May require coordinating multiple islands 3 - Likely to result in Transmission overloads or other issues 4 - Affects a very large geographical area, and many customers 5 - Most commonly caused by human or switching errors A) 1 & 3 B) 2 & 4 C) 3 & 5 D) 1 The first step in a system restoration would be to: A) Immediately notify the media of the event B) Restore as much of the area load as possible C) Restore as much under-frequency load as possible D) Verify that communication is functional with your neighbors Why would an offsite power to generating facilities be a priority during the restoration process? A) To provide safe shutdown power for the units B) To meet FERC requirements C) To provide adequate lighting for the plant operators to attempt a restart D) To prepare and expedite the return of the unit Factors that help determine the sequence of restoration of off-line generation include (Pick 2): -Generation Type -Unloaded Capacity -Unit Availability -Stability of the Generator How often should a Transmission company file an updated restoration report with PJM? 1 - Every 30 minutes 2 - Every hour 3 - Every 10 lines that have been restored 4 - Every 5 lines that have been restored A) 1 & 4 B) 2 & 3 C) 1 & 3 D) 2 & 4 Which of the following statements are true concerning delays in restoring auxiliary power to off-line generation? 1 - The unit could suffer turbine shaft damage 2 - The fuel oil for the unit could congeal 3 - The startup time for the unit will be reduced 4 - The battery life used to maintain critical systems may run out A) 1, 2 and 3 B) 1, 2 and 4 C) 1, 3 and 4 D) 2, 3 and 4 During system restoration, the two categories of reserves are: A) dynamic and secondary B) spinning and quick start C) dynamic and spinning D) spinning and primary During a system restoration you have 400MW of Steam capacity, 350MW of CT capacity and 300MW of Hydro capacity restored. Your largest contingency is a 200MW Steam Unit. You have also restored 150MW of under-frequency load. What is your total dynamic reserve? (Load pick-up factors are 5% for steam, 15% for hydro and 25% for CT) A) 142.5MW B) 152.5MW C) 285MW D) 292.5MW What is the most critical communication path when restoring large load blocks early in a system restoration? A) Between the Generating Unit and the Transmission Owner B) Between PJM and the generating plant C) Between the Generator Owner (or MOC) and the generating unit D) Between the transmission owner and the MOC Your entire system has blacked out due to an event. You receive word from PJM that the entire region is affected as well. Your blackstart generation resources are spread throughout your system, which cover a large area. Which restoration strategy would be the best for you to implement? A) Combination approach B) Bottom-up Core Island approach C) Top-down approach D) Bottom-up Multiple Island approach During a system restoration, which entity directs the loading of generation, to match the load restored? A) PJM B) The Generating Unit C) The Transmission Owner D) The Generation Owner (or MOC) Your entire system has blacked out due to an event. You receive information the your neighboring systems are also blacked out. Your main urban load center restoration strategy would be the best for you to implement? A) Combination approach B) Bottom-up Core Island approach C) Top-down approach D) Bottom-up Multiple Island approach Select the statement that best describes why Minimum Source Requirements have been established: A) To ensure system stability prior to interconnecting with another entity B) To reduce major frequency fluctuations when energizing load C) To prevent or reduce the effects of line changing when energizing EHV transmission D) To ensure that adequate Dynamic Reserves exist prior to interconnection with another entity Which of the following is true concerning blackouts? A) They are only possible at peak load levels B) They are only caused by Human Error C) They could occur at any time or any load level D) They cannot happen in PJM because of PJM's operating philosophies For each transmission zone that has a critical load requirement PJM will ensure at a minimum the allocation of how many Black Start resources? A) 1 B) 2 C) 3 D) 4 During a restoration process you have 6,000MW of customer demand restored and frequency drop by 1 Hz how much load needs to be shed to restore frequency back to where it was prior to the disturbance? A) 180MW to 360MW B) 300MW to 480MW C) 360MW to 600MW D) 480MW to 720MW Which of the following is/are requirements for Black Start Units? (Pick all that apply) - Must have and maintain procedures for the unit - Have the ability to maintain frequency and voltage under varying load - Must be tested every 3 years - Must be able to run for 12 hours, or defined by the TO restoration plan Which of the following statements would be considered an implication from receiving power from an outside entity? A) Equipment Damage B) Isolation of the unit from the outside entity C) Maximize the time for generator restarts D) Unintentional interconnection between the two areas Which of the following would be considered pre-tie preparations when interconnecting islands? (Select 2) - Ensure reliable communications are available for all entities involved in the interconnection process - Recalculation of reserves - Identification of the transmission line to tie areas together - Provide updated hydroelectric capability If a change in the capability of a Black Start resource affects the ability of a generator to meet the Transmission Operator's individual restoration plant, the Generation Operator shall notify the Transmission Operator of the known changes within. A) 4 hours B) 8 hours C) 16 hours D) 24 hours During a restoration process, Generation Owners are required to update their progress by submitting a report: A) On an hourly basis B) Every 1/2 hour C) For every unit returning to service D) As conditions on the system change Concerning PJM requirements for critical start generation, which of the following statements applies to the units capability to maintain frequency? (2) A) Dynamic offline testing of the units voltage controls B) Picking up an isolated block of loads C) Producing leading and lagging VARs D) Dynamic Off-line testing of the units governor control During system restoration, a generator should not be loaded above the level of available A) operating reserve B) synchronized reserve [Show More]

Last updated: 1 week ago

Preview 1 out of 40 pages