NERC Prep - Bal, Int, & Trans Test 2023

b. NERC Operating Committee - ANSWER-What group can approve a change in the Disturbance Recovery Period for an Interconnection? a. NERC Interconnection Working Group b. NERC Operating Committee c. NERC Regional Council d. NERC Disturbance Analysis Working Group c. Check targets and equipment - ANSWER-What is the first thing an operator should do after a relay operation? a. Check power system stabilizers b. Notify adjacent Transmission and Balancing areas c. Check targets and equipment d. Notify their PSE that the transmission path is out of service c. Tie Lines - ANSWER-For the ACE equation to work properly, dynamic schedules, pseudo ties, frequency calculations, and all ________ must be metered. a. Communications b. Transformers c. Tie Lines d. Generation c. Energy Emergency Alert Level I - ANSWER-What Energy Alert Level would the following example be categorized as? "A Balancing Authority, Reserve Sharing Group, or Load Serving Entity foresees, or is experiencing conditions where all available resources are committed to meet firm load, firm transactions, etc, and requests an Energy Emergency Alert." a. Energy Emergency Alert Level IV b. Energy Emergency Alert Level III c. Energy Emergency Alert Level I d. Energy Emergency Alert Level II b. Implement the appropriate congestion management procedure. - ANSWER-You are a Reliability Coordinator in the Eastern Interconnection. A flow gate has become overloaded because a parallel 345kV line has relayed out and part of that load has transferred over to the flow gate causing an SOL and possible IROL violation. What would you do to relieve this violation? a. Notify another Reliability Coordinator and ask them if they are having any problem, and what should you do. b. Implement the appropriate congestion management procedure. c. Issue a Transmission warning to the Transmission Operators that lost the 345kV line. d. Place the line back in service within 30 minutes. b. Adjacent Balancing Authorities - ANSWER-Interchange schedules may be implemented between _______________________. a. Source and Sink Balancing Authorities b. Adjacent Balancing Authorities c. Sending, Receiving and Intermediate Balancing Authorities in the same Region. d. Balancing Authorities in the same Interconnection. a. Frequency will continue to drop, generator governor response, decrease in load. - ANSWER-When the frequency of an Interconnection decreases due to the loss of a large generator, the ________________ until the combination of both ____________ and ______________ replace the output of the lost generator. a. Frequency will continue to drop, generator governor response, decrease in load b. Frequency will continue to drop, generator governor response, voltage regulating transformer response c. Voltage will continue to raise, generator AVR response, voltage regulating transformer response d. Voltage will continue to raise, generator AVR response, decrease in load a. That all involved reliability entities determined that there is no reliability problems with the Arranged Interchange. - ANSWER-In developing and setting up an Arranged Interchange, which of the following would transition the Arranged Interchange to the Confirmed Interchange status? a. That all involved reliability entities determined that there is no reliability problems with the Arranged Interchange. b. The Department of Energy (DOE) made an in-depth study of the Interchange Agreement and determined that it would have an adverse affect on the Interconnection. c. There are available resources to meet the load. d. All parties involved realized that they would not lose money for their company with this Interchange Agreement. b. He violated NERC standards - ANSWER-Early in the afternoon, a system operator notices that frequency has dropped to 59.95Hz and his balancing area's ACE is 0. In order to correct the under frequency condition, the operator pulses his generators to increase generation. Which statement best describes his actions? a. He followed NERC guidelines b. He violated NERC standards c. He helped the system d. He has not impacted the system d. 81 MVars - ANSWER-Voltage of a 345kV transmission line is at 90% of normal. If you energize a capacitor rated at 100MVar, what will the actual MVars gained? a. 60 MVars b. 30 MVars c. 50 MVars d. 81 MVars b. No further system operating action is required. - ANSWER-A Balancing Area's pre-contingency ACE is -40 MW (below the zero balance point). At 1525, event time ZERO, the BA looses 800 MW of generation; initial governor action arrests frequency decay and shows the BA's ACE is now -825 MW. At 1542 the BA's ACE has returned to -42 MW and the system frequency is 60.001Hz. Assuming that this event is within the DCS reporting criteria, what other action is the BA required to take? a.BA must notify the RC that Energy Emergency Alert is required to return ACE to ZERO. b. No further system operating action is required. c. The BA recovered more than 80% of its most severe single largest contingency within 15 minutes. No EEA is required. d. The BA must notify the RC that a unit has been lost and EEA Level 1 is required. b. Ground Fault - ANSWER-A tree has been growing under a 230kV transmission line getting closer every year. As a result of the heavy transfer of megawatts on this particular day, the line sags too close and flashes over to the tree causing the transmission line to relay out. What type of fault would this fault be classified as? a. Overvoltage Fault b. Ground Fault c. Differential Fault d. Positive Sequence Fault b. CPS1 greater than or equal to 100% and CPS2 greater than or equal to 90% - ANSWER-To conform to the CPS requirements, a Balancing Authority must have a __________________. a. CPS1 greater than or equal to 90% or CPS2 greater than or equal to 110% b. CPS1 greater than or equal to 100% and CPS2 greater than or equal to 90% c. CPS1 greater than or equal to 200% and CPS2 greater than or equal to 100% d. CPS1 greater than or equal to 90% and CPS2 greater than or equal to 100% a. Past load patterns - ANSWER-In order to predict the system's near term load pattern, a system operator must have information including weather forecasts and _____________. a. Past load patterns b. Generator overhaul schedules c. Sufficient metering d. Generator efficiency ratings a. No tag is needed because the emergency transaction has duration less than 60 minutes. - ANSWER-A Balancing Authority has unexpectedly lost 300 MW of generation and has arranged to receive emergency energy from a neighboring Balancing Authority for 40 minutes, after which the emergency energy will be replaced by an energy purchase from a PSE. Which of the following is a correct statement for the operating reserve transaction? a. No tag is needed because the emergency transaction has duration less than 60 minutes. b. The PSE must provide a tag for the emergency energy within 60 minutes c. The Sink Balancing Authority must provide a tag for the emergency energy within 60 minutes d. The Source Balancing Authority for the emergency energy must provide a tag within 60 minutes a. Notify the RC that this BA is in an EEA Level 2; start all available generation; schedule interchange purchases; prepare to reduce firm load. - ANSWER-A Balancing Authority Area has a load forecast for 5,000 MWs for today's peak at 1430. The Interchange Schedule shows 1,500 MWs of imports for HE 0400 through HE 2200; the largest single transaction is 1,200 MWs. The total generation on line is 7,500 MWs. The largest single generator in the area is an 800 MW coal unit. At 1215 a thunder storm trips 3,000 MWs of generation with a minimum resynchronizing time of 3 hours. And simultaneously trips 1,500 MW of generation in the area exporting 1,200 MWs to this BA. The exporting BA instantly cuts the schedule to ZERO. This BA is NOT part of a Reserve Sharing Group. What action must this BA take? a. Notify the RC that this BA is in an EEA Level 2; start all available generation; schedule interchange purchases; prepare to reduce firm load. b. Notify the RC that this BA is in EEA Level 1; notify all power plants to be on alert; purchase emergency power. c. Notify the RC that this BA is in EEA Level 3; notify Transmission Operator and all Load Serving Entities that Load Shed is eminent. d. Notify the RC that this BA is contacting TOPs and LSEs to shed 200 MW of load. a. Differential Relay - ANSWER-A substation maintenance employee calls the control room and says that the west bus at one of your substations has relayed with a target 87 showing on the bus relay panel. What type of relay has operated? a. Differential Relay b. Distance Relay c. Time Overcurrent Relay d. Lockout Relay d. Dynamic - ANSWER-Examples of __________ reactive resources include generators, synchronous condensers, SVC's and lightly loaded transmission lines. a. Costly b. Static c. Stationary d. Dynamic d. 1% - ANSWER-NERC has established minimum bias setting standards for Balancing Authorities. The bias setting for Balancing Authorities serving native load must be at least what percent of the Balancing Authorities' estimated yearly peak demand per 0.1Hz change in frequency? a. 10% b. 5% c. 0.5% d. 1% c. Include their respective share of the unit governor droop response. - ANSWER-Three Balancing Authorites share the output of a jointly-owned generating unit using dynamic schedules. How should the Balancing Authorities account for the unit when calculating their respective frequency bias? a. Each Balancing Authority should include the full governor droop response in their frequency bias value. b. The unit governor droop should be shared equally, regardless of ownership shares. c. Include their respective share of the unit governor droop response. d. Only the Host Balancing Authority should include the unit governor droop response. b. 285 - ANSWER-A dynamic schedule is running with a MW profile of 285 MW. Last hour the actual hourly integrated energy was 310 MWs. What will be the schedule for the next available scheduling hour? a. 320 b. 285 c. 310 d. 313.5 a and d only - ANSWER-According to NERC, by the end of the business day following the actual operation, two adjacent Balancing Authorities must agree upon what values with regard to inadvertent interchange? a. The hourly values of Net Interchange Schedule b. The hourly values of each Interchange Transaction c. The hourly megawatt-hour values of individual interconnecting tie lines d. The hourly megawatt-hour values of Net Actual Interchange c. Shed load at the end of the line - ANSWER-A radial transmission line feeding a load is overloaded. The transmission operator must do which of the following to unload the line? a. Lower interchange schedules b. Raise interchange schedules c. Shed load at the end of the line d. Notify BA to adjust AGC c. Current Transformers - ANSWER-Protective relays such as Transmission Line relays and Transformer Differential relays have current flowing to them that is proportional to the current that is in the primary circuit. In most cases, what is used to transform the current from the primary circuit to a similar proportional amount that flows to the protective relay? a. Vacuum Interrupters b. Positive Sequence Instruments c. Current Transformers d. Series Capacitors d. The Transmission Operator for the area the generator is located. - ANSWER-As a Generator Operator, you realize that your generator voltage is swinging wildly. You place your generator voltage regulator on manual, and adjust the voltage and reactive levels on the generator. Who do you contact and inform about the status of your generator voltage regulator? a. The Balancing Authority b. Power Marketers c. The Reliability Coordinator d. The Transmission Operator for the area the generator is located. d. Prepare for the next contingency - ANSWER-A Transmission Operator experiences loss of a 230kV transmission line on a permanent fault. It will be out of service for two hours. In addition to making proper notifications, the Transmission Operator should take which of the following actions? a. Do nothing. In two hours, the system will be back to normal. b. None of the choices provided are correct. c. Issue an urgent public appeal for energy conservation d. Prepare for the next contingency b. Misoperation - ANSWER-"Any failure of a Protection System element to operate within the specified time when an abnormal condition occurs within a zone of protection". This definition is more closely related to which of the following term? a. Fault b. Misoperation c. Trip circuit failure d. Over Tripping d. Islanding - ANSWER-When an area of the transmission system separates from the remainder of the Interconnection, this is referred to as _________________. a. Instability b. System breakup c. Leaving the system d. Islanding a. Offer assistance to entities needing it - ANSWER-Interconnection frequency is remaining around 59.92Hz, a BA's ACE is 0 and they have 60MW of extra generation. What should the BA do? a. Offer assistance to entities needing it b. Shed load c. Increase Generation d. Nothing a. 10 - ANSWER-With regards to Voltage Control Theory, as long as power angles are less than _______ degrees, reactive power will flow from the higher to the lower voltage magnitude. a. 10