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WorksheetsBig Test Dude Part 3
Total questions: 99
Worksheet time: 25hrs 45mins
What is the upper limit to the CPS1 magnitude?
1000%
No limit
100%
200%
Which performance measure provides the best indication that a Control Area maintains enough Operating Reserve?
CPS2
FRC
DCS
CPS1
What percentage of Contingency Reserve MUST be frequency responsive Spinning Reserve?
50%
100%
75%
No limit
A generating unit within Control Area "A" metered boundaries has 100 MW of frequency responsive
Spinning Reserve. Control Area "B" has firm rights to 50% of this unused capacity. Control Area
"B" schedules the generation into its Control Area boundaries via a Fixed Schedule. How many
MW of frequency responsive Spinning Reserve does Control Area "B" have in this unit?
50 MW
100 MW
0 MW
25 MW
A 500 MW generating unit has 100 MW of unused, synchronized capacity. The governor is blocked on the unit. How much of the Contingency Reserve's frequency responsive Spinning Reserve can be counted from this unit?
75 MW
100 MW
0 MW
50 MW
What is the maximum suggested time error accumulation in the Eastern Interconnection?
4
8
2
3
Assuming the initial system frequency was 60 HZ and no initial net interchange error, use the data provided below to answer the following question:
Bias = -100 MW/0.1 HZ
NIA = 500 MW
NIS = 400 MW
IME = 0
FS = 60 HZ
FA = 59.9 HZ
What is the Control Area's ACE value (assuming governor response has occurred)?
100 MW
200 MW
0 MW
50 MW
What item below best describes what could have happened in this Control Area?
Generation lost external to the Control Area's metered boundaries
Generation lost internal to the Control Area's metered boundaries
Load lost external to the Control Area's metered boundaries
Load lost internal to the Control Area's metered boundaries
A Control Area with a frequency bias of -100 MW / 0.1 HZ and an L10 value of 50 plans to unilaterally pay back an inadvertent accumulation. What is the maximum MW the Control Area can pay back at any one time?
50 MW
100 MW
5 MW
20 MW
Each Control Area must have which of the following metering installed on their tie-lines with other Control Areas?
MW & MVAr
MW & MWh
MW
MVAr
If a 50 MVAr shunt capacitor is energized at 90% of its nominal voltage, its reactive power output is:
40 MVAr
35 MVAr
50 MVAr
A Control Area experiences a disturbance which results in a violation of their operating security limits. Which Control Areas are obligated to implement actions to restore transmission security?
The Control Areas that contributed to the violations and the Control Areas affected by the violation
No Control Area has an obligation. The obligations for system restoration rest with the appropriate security coordinator
The Control Area that contributed to the operating security limit violation
For a dynamic schedule, a change in the hourly energy profile of _____% or more requires a revised tag.
25
20
10
15
A certain dynamic schedule is tagged for an average flow of 100 MW, by what minimum amount would this schedule have to change before a new tag was required?
10
100
25
15
Your Control Area is planning the outage of a transmission facility which will impact system reliability. Which of the following entities (excluding marketing functions) should be involved in this outage planning/coordinating process?
A) Your Control Area and any Control Area that is connected to the outaged facility
B) Your Control Area and all Control Areas impacted by the planned outage
C) Your Control Area and all systems impacted by the planned outage
D) Your Control Area
Your Control Area and any Control Area that is connected to the outaged facility
Your Control Area and all Control Areas impacted by the planned outage
Your Control Area and all systems impacted by the planned outage
Your Control Area
The Interconnection has broken into islands following a large disturbance. You are about to synchronize two islands together via an open circuit breaker. All of the following must be checked before synchronizing EXCEPT:
Voltage magnitude difference
Power factor difference
Voltage phase angle difference
Frequency difference
A nuclear unit suddenly trips off-line following a major system disturbance. How long would it likely take to restart the nuclear unit assuming off-site power was supplied to the unit and the transmission system connecting the unit was restored?
48 hours
96 hours
1 hour
12 hours
The computer models used for analyzing and planning power system operations should be reviewed and updated how often to ensure they accurately and adequately represent the power system?
Annually
As necessary
Monthly
A large power plant has a small generator that is continually run and used to provide power for the plant's auxiliary loads. This type of generation is called a(n):
Start-up generator
Station service generator
Emergency generator
Black-start generator
The Interregional Security Network (ISN) is designed to:
A) Increase interregional power transfer limits
B) Enhance operational security data sharing between operating entities
C) Enhance angle stability across Regional boundaries
D) Enhance power marketing opportunities between the Regions of NERC
Pick the best definition for a system operator's operating authority.
A) The authority to perform their operating responsibilities
B) A complete list of a system operator's operating responsibilities
C) The authority to operate circuit breakers
D) The authority to implement interchange transactions
Computer simulations show that for a 100 schedule from Bus A to Bus B, 58% of the schedule will flow on unscheduled, parallel paths and the remainder will flow on the scheduled path. What is the distribution factor for the scheduled flow?
100%
42%
58%
0%
Transformer #1 experiences a fault. Which circuit breakers would you expect to clear the fault if transformer #1 was protected with a differential relay?
1, 2, 3, and 4
1, 2, and 3
1, 2, and 5
1, 2, and 4
Given the following four choices, pick two methods that NERC recommends be used to verify a system's power system restoration plan.
1)Actual testing in the power system
2)Simulation testing using computer models
3)Testing using the NERC testing center
4)Testing during an actual event
3 & 4
1 & 2
1 & 4
2 & 3
A governor, connected to a 100 MW unit, has a 5% droop with a .05 HZ deadband. If the initial frequency is 60 HZ and the initial generator load is 50 MW, what will the generator output be if the frequency suddenly falls to 59.95 HZ?
33 MW
100 MW
50 MW
67 MW
A power system experiences the trip of a key transmission line. Additional transmission line tripping rapidly follows. This condition is known as a __________ outage.
A) Double contingency
B) Loss of field
C) Cascading
D) Single contingency
Which performance measure provides the best indication that a Control Area maintains enough
A) CPS2
B) FRC
C) DCS
D) CPS1
What entity is the source of the solar magnetic disturbance "K" warnings?
A) Appropriate Regional Council
B) NERC
C) National Oceanic and Atmospheric Administration (NOAA)
D) North American Space Agency (NASA)
Your SCADA system accurately indicates zero voltage at a bus and all circuit breakers connected to the bus show closed. The SCADA also indicates that all the remote circuit breakers that feed the bus are open. Your best estimate of what happened is:
A) There is a stuck circuit breaker and the back-up protection system has remotely cleared the
B) A differential relay has operated in the substation
C) RTUs at the bus have failed
The entity which has the primary responsibility and authority for the reliable, real-time generation control and/or real-time operation of the interconnected bulk electric system, and is accountable to NERC and its Regional Councils for complying with the NERC Operating Policies and Regional Policies is called:
A) The ISO
B) The Operating Authority
C) The Control Area
D) The Security Coordinator
Generating units with nameplate ratings of _____ or greater should be equipped with governors responsive to frequency deviations unless restricted by regulatory mandates.
25 MW
50 MW
5 MW
10 MW
The process of choosing which generating units will be used to meet the projected system demand requirements is called:
A) Load/frequency control
B) Load forecasting
C) Unit commitment
D) Economic dispatch
During the 1200-1700 time period of the day, how many seconds of positive time error will normally initiate a time error correction in the ERCOT Interconnection?
4
8
2
3
Frequency is scheduled at 60.02 HZ. Suddenly the actual frequency drops from 60.02 to 59.82. If a Control Area has a bias of -50 MW/0.1 HZ, what is their frequency regulation responsibility?
A) 50 MW
B) -100 MW
C) 100 MW
D) -50 MW
Computer simulations show that for a 100 schedule from Bus A to Bus B, 63% of the schedule will flow on the scheduled path and the remainder will flow on other parallel paths. What is the distribution factor for the unscheduled flow?
37%
0%
100%
63%
A generator with an active governor has a droop of 5%. What magnitude of frequency change
would cause this governor to move the generator 25% of its MW capability?
3 HZ
5 HZ
0.75 HZ
1.5 HZ
A Control Area's AGC system fails. What minimum generation control strategy must be employed by this Control Area?
The Control Area has no generation control responsibilities, it can lean on the Interconnection as required
The Control Area shall use manual control actions to match their actual net interchange as close as possible to their scheduled net interchange
The Control Area must operate in Constant Frequency control
The Control Area must operate in Constant Interchange control
A differential relay is used to protect a two winding wye-wye transformer. The voltage on the high side is twice that of the low side. What would be the ratio of the high side winding CT to the low side winding CT to compensate?
2:1
2:2
1:2
1:3
Assume a preliminary disturbance report was submitted and a final disturbance report is now required. How long do the affected systems have to prepare the final report and submit it to the Region and NERC?
45 days
60 days
24 hours
30 days
Studies have shown that a particular system can reduce its load magnitude by 3% for a 5% reduction in voltage. Assuming that the initial load is 1000 MW, how much load reduction will follow a 2-1/2% voltage reduction?
30 MW
40 MW
15 MW
20 MW
To conform to the CPS, a Control Area must have a:
A) CPS1 greater than or equal to 100% and CPS2 greater than or equal to 90%
B) CPS1 greater than or equal to 100% or CPS2 greater than or equal to 90%
C) CPS1 greater than or equal to 90% and CPS2 greater than or equal to 100%
D) CPS1 greater than or equal to 90% or CPS2 greater than or equal to 100%
The e1 value is the:
A) 1 minute average of the Interconnection's acceptable frequency error
B) 10 minute average of the Interconnection's acceptable frequency error
C) 1 minute average of the Control Area's ACE
D) 10 minute average of the Control Area's ACE
Pick the best definition for a "black-start" capable generator.
A generator that can be restarted without the aid of an outside (plant) power source
A generator that is capable of restarting only after all of its excitation current has been removed
A generator that is capable of restarting when a "black-start" source from the system is connected to it
If no other entity creates the tag, which entity must create the tag?
A) The PSE serving the load
B) The Receiving Control Area
C) The PSE serving the generation
D) The Sending Control Area
Which of the following combinations represents the best generation control by a Control Area?
A) CPS1=115%; CPS2=85%
B) CPS1=99%; CPS2=99%
C) CPS1=90%; CPS2=90%
D) CPS1=110%; CPS2=95%
With respect to the DCS, a Reserve Sharing Group is considered in a disturbance condition when:
A) Regional frequency falls below 59.95 HZ
B) a 500 MW or larger generator is lost within the Reserve Sharing Groups boundaries
C) Any member is in a disturbance condition and calls for reserves
Each Control Area shall operate its AGC in which mode of AGC control (unless each operation is adverse to system reliability)?
A) Tie-line frequency bias
B) Tie-line interchange bias
C) Flat tie-line
D) Flat frequency
The frequency offset for a time error correction is:
A) 0.03 HZ
B) 0.04 HZ
C) 0.01 HZ
D) 0.02 HZ
Inadvertent interchange is equal to:
A) Net positive interchange - net negative interchange
B) Net negative interchange - net positive interchange
C) Net actual interchange - net scheduled interchange
D) Net scheduled interchange - net actual interchange
Assume Control Area "A" has a frequency bias of -50 MW/0.1 HZ and that Control Area "B" has a frequency bias of -100 MW/0.1 HZ. What would the bias value of Control Area "B" be if it provided supplemental regulation service for Control Area "A"?
A) -125 MW/0.1 HZ
B) -150 MW/0.1 HZ
C) -50 MW/0.1 HZ
D) -100 MW/0.1 HZ
Each Control Area must have which of the following metering installed on their tie-lines with other Control Areas?
A) MW & MVAr
B) MW & MWh
C) MW
D) MVAr
Periodically, each Control Area shall agree with its Adjacent Control Areas as to their total scheduled interchange and total actual interchange for both on and off peak periods. How often is "periodically"?
Weekly
Monthly
Hourly
Daily
Why is the location of transmission system reactive power reserves important?
A) Large power angles result from reactive power transfer
B) NERC Policies forbid transmitting reactive power long distances
C) To ensure all systems provide their fair share of reactive power reserve
D) Reactive power is difficult to transmit through high impedance
Which of the following actions is used to prevent a voltage collapse (due to a reactive power deficiency)?
A) Offset the scheduled frequency
B) Reduce generator output
C) Implement load reduction
D) Lower transmission level voltage magnitude
Unless agreed to by all involved Control Areas, the normal ramp duration for an Interchange Schedule between the Eastern and ERCOT Interconnections is:
A) 15 minutes
B) 20 minutes
C) 5 minutes
D) 10 minutes
An Interchange Transaction is not implemented until it is incorporated into:
A) The ISN
B) The Control Area's net actual interchange
C) The Control Area's net scheduled interchange
D) The OASIS system
A PSE terminates an Interchange Transaction that is in progress. The PSE notifies the Sink Control Area that it submitted the tag to. The Sink Control Area must contact:
1)The Source Control Area
2)The Receiving Control Area
3)The Sending Control Area
4)Their Security Coordinator
3 & 4
1 & 4
1 & 2
2 & 3
What type of protective relay system always incorporates telecommunication facilities in the protection scheme?
A) Distance relays schemes
B) Pilot protection schemes
C) Differential relay schemes
D) Overcurrent relay schemes
The purpose of the NERC "Confidentiality Agreement for Electric System Security Data" is:
To prevent sharing security data with those entities engaged in the wholesale merchant function
To prevent sharing security data with those entities engaged in the retail merchant function
To list the types of data that will be shared via the Interregional Security Network
All of the following Electric System Security Data are to be updated at least every 10 minutes EXCEPT:
A) ACE and frequency
B) Forecast Changes in Equipment Status
C) Operating Reserves
If a voltage reduction to reduce load magnitude is attempted on transmission system level voltages, it may not be effective because:
A) Of the excitation system response of area generators
B) The customer load voltage is typically regulated
C) Of the Ferranti effect
D) Of the governor response of area generators
A system in the process of restoration has 2000 MW of synchronized generation and 1000 MW of connected load. What amount of load should be shed to raise the frequency 1 HZ?
A) 100-150 MW
B) 150-200 MW
C) 30-60 MW
D) 60-100 MW
How often does NERC recommend that studies be made to determine the transfer capability between interconnected Control Areas?
A) Biannually
B) Monthly
C) Annually
D) Quarterly
A transmission path has a short-term (10 minute) thermal limit of 1500 MVA and a long-term (30 minute) thermal limit of 1000 MVA. If remedial actions to correct an overload would take 20 minutes, what is this transmission path's operating limit?
A) 500 MVA
B) 750 MVA
C) 1000 MVA
D) 1500 MVA
The Interregional Security Network (ISN) is designed to:
Increase interregional power transfer limits
Enhance operational security data sharing between operating entities
Enhance angle stability across Regional boundaries
Enhance power marketing opportunities between the Regions of NERC
Restoration services on critical telecommunications channels should be available:
A) As needed by the system operator
B) As directed by the Regional Time Error Monitor
C) 24 hours a day
D) During the peak load hours of the day
Pick the best definition for a system operator's operating authority.
A) The authority to perform their operating responsibilities
B) A complete list of a system operator's operating responsibilities
C) The authority to operate circuit breakers
D) The authority to implement interchange transactions
Information required for system studies, such as critical facility status, load, generation, operating reserve projections, and known Interchange Transactions, shall be available (to the appropriate Security Coordinator) by:
A) 1200 hours
B) 1400 hours
C) 0800 hours
D) 1000 hours
Energy Emergency Alert Level 1 is a condition where:
A Control Area foresees or has implemented firm load obligation interruption
A Control Area has requested assistance from their Security Coordinator
A Control Area foresees or is experiencing conditions where all available resources are committed to meet firm load, firm transactions, and reserve commitments
A Control Area is no longer able to provide its customers expected energy requirements
The Electric System Security Data that is available via the ISN is intended primarily for which
entity's use?
A) Transmission Providers
B) Purchasing-Selling Entities
C) Security Coordinators
D) Control Areas
Emergency actions for immediately responding to a sudden generation capacity deficiency may include:
A) Purchasing economic energy
B) Scheduling available emergency assistance and/or implementing manual load shedding
C) Starting another coal-fired steam unit
D) Canceling proposed equipment maintenance for on-line units if it derates the unit by 10% or
Restoration services on critical telecommunications channels should be available:
A) As needed by the system operator
B) As directed by the Regional Time Error Monitor
C) 24 hours a day
D) During the peak load hours of the day
Operating Reserve can be provided by:
A) Voltage regulators
B) Interruptible loads
C) Tap changers
D) Capacitor banks
An under-frequency load shed plan would be deemed ineffective if the system was left in which of
the following conditions:
A) Under-voltage combined with loss of load
B) Over-voltage combined with loss of load
C) Over-frequency combined with loss of load
D) Under-frequency combined with loss of load
A transmission path has a short-term thermal limit of 1000 MVA, a long-term thermal limit of 900 MVA, a voltage stability related transfer limit of 850 MVA, and an angle stability related transfer limit of 1100 MVA. What is this transmission path's short term operating limit?
A) 1000 MVA
B) 1100 MVA
C) 900 MVA
D) 850 MVA
Assume a large system disturbance has occurred. Frequency meters from multiple locations within the Control Area show consistently different values for the frequency. A reasonable conclusion is:
The system's governors are responding improperly
The disturbance is minor and will pass
The meters must be broken
The control area has broken into islands.
Pick the best definition for a protective relay's "polarization" source.
A) Used by the relay to calculate the phase-to-ground voltage
B) Used by the relay to determine the direction of power and/or current flow
C) Used by the relay to determine system impedance
D) Used by the relay to calculate the phase-to-phase voltage
With respect to an Interchange Schedule, what is the minimum information that must be shared between the Control Areas involved?
1)The schedule path and MW magnitude
2)The start/stop times, ramp rate, and duration
3)The price of the energy
4)MVAr accounting information
3 and 4
1 and 4
1 and 2
2 and 4
Unless agreed to by all involved Control Areas, the normal ramp duration for an Interchange Schedule between the Eastern and ERCOT Interconnections is:
A) 15 minutes
B) 20 minutes
C) 5 minutes
D) 10 minutes
The entity which has the primary responsibility and authority for the reliable, real-time generation control and/or real-time operation of the interconnected bulk electric system, and is accountable to NERC and its Regional Councils for complying with the NERC Operating Policies and Regional Policies is called:
A) The ISO
B) The Operating Authority
C) The Control Area
D) The Security Coordinator
Assume a Control Area has a large positive non-firm net scheduled interchange component. The Control Area suffers a generation loss which leads to a large negative ACE. The Control Area does not have enough Operating Reserve to satisfy the DCS. If all of the following options were available, which would be the best action to take?
Reduce the remaining non-firm net scheduled interchange as needed
Rely on the Interconnection's frequency bias until natural load variation improves the ACE value
Immediately implement manual load shedding
Energy Emergency Alert Level 0 is a condition where:
A Control Area foresees or has implemented firm load obligation interruption
The Energy Emergency has been terminated
A Control Area foresees or is experiencing conditions where all available resources are committed to meet firm load, firm transactions, and reserve commitments
A Control Area is no longer able to provide its customers expected energy requirements
A major disturbance occurs within your Region. Your Control Area is in good condition but based
on the reports you have received, you know other Control Areas are experiencing capacity
emergencies. You have emergency assistance available. Your next action should be to:
A) Raise generation immediately to support the Interconnection frequency
B) Immediately separate from the Interconnection
C) Wait for the deficient Control Areas to request economy energy
D) Make known your capabilities to provide emergency assistance
Control Area "A" has a +100 MW schedule going to Control Area "B" from 10:00 to 11:00. The
schedule starts at 10:00 and is ramped in using a 10 minute ramp. Control Area "B" requests that
the schedule be curtailed at 10:15. The two Control Areas agree to cancel the schedule effective at
10:20 and again agree to use a 10 minute ramp. What is the integrated value of the schedule?
A) 100 MWh
B) 67 MWh
C) 25 MWh
D) 33 MWh
A synchronous condenser is capable of all of the following, on a sustained basis, EXCEPT:
A) Absorbing MVAr
B) Providing MVAr
C) Absorbing MW
D) Providing MW
What entity is the source of the solar magnetic disturbance "K" warnings?
A) Appropriate Regional Council
B) NERC
C) National Oceanic and Atmospheric Administration (NOAA)
D) North American Space Agency (NASA)
What type of protective relay system always incorporates telecommunication facilities in the protection scheme?
A) Distance relay schemes
B) Pilot protection schemes
C) Differential relay schemes
D) Overcurrent relay schemes
In order to rotate the shaft of the generator/turbine, thermal units are typically equipped with a __________.
A) condenser
B) turning gear
C) governor
D) exciter
Pick the best definition for a system operator's operating authority.
A) The authority to perform their operating responsibilities
B) A complete list of a system operator's operating responsibilities
C) The authority to operate circuit breakers
D) The authority to implement interchange transactions
A neighboring system has declared an energy emergency and has requested emergency assistance from your Control Area. Your Control Area has sufficient spare generation and transmission availability. In order for your Control Area to provide emergency assistance, you must:
A) Implement an emergency interchange schedule with your neighbor
B) Raise your generation level the required amount
C) Call your Contracts Department and determine a price for the emergency assistance
Of the various components of the performance standards which apply only during disturbance
conditions?
A) None of the components apply only during disturbance conditions
B) CPS2
C) DCS
D) CPS1, CPS2, and DCS
What percentage of Contingency Reserve must be frequency responsive Spinning Reserve?
50%
100%
75%
No limit
Inadvertent interchange accumulations may be paid back by one or both of the following methods:
A) Incremental and/or decremental
B) Positive and/or negative accumulation
C) Unilateral and/or bilateral
Which of the following statements is FALSE about Regulating Reserve?
A) Unused, synchronized capacity
B) A component of Contingency Reserve
C) Responsive to AGC commands
D) Taken from Spinning Reserve
A generating unit within Control Area "A" metered boundaries has 100 MW of frequency responsive Spinning Reserve. Control Area "B" has firm rights to 50% of this unused capacity. Control Area "B" schedules the generation into its Control Area boundaries via a Fixed Schedule. How many MW of frequency responsive Spinning Reserve does Control Area "B" have in this unit?
A) 50 MW
B) 100 MW
C) 0 MW
D) 25 MW
Assuming the initial frequency is 60 HZ and no initial net interchange error, use the following data to answer the next question.
Frequency bias = -50 MW/0.1 HZ
Scheduled frequency = 60 HZ
Actual frequency = 59.90 HZ
Scheduled interchange = -1000 MW
Actual interchange = -1100 MW
Given this data, the ACE value for the Control Area (assuming governor response has occurred) is:
A) -100 MW
B) -150 MW
C) 0 MW
D) -50 MW
Assuming the initial frequency is 60 HZ and no initial net interchange error, use the following data to answer the next question.
Frequency bias = -50 MW/0.1 HZ
Scheduled frequency = 60 HZ
Actual frequency = 59.90 HZ
Scheduled interchange = -1000 MW
Actual interchange = -1100 MW
If we assume the bias value is correct in this data, what is the generation error for this Control Area after governor response has occurred?
A) -100 MW
B) -150 MW
C) 0 MW
D) -50 MW
Assuming the initial frequency is 60 HZ and no initial net interchange error, use the following data to answer the next question.
Frequency bias = -50 MW/0.1 HZ
Scheduled frequency = 60 HZ
Actual frequency = 59.90 HZ
Scheduled interchange = -1000 MW
Actual interchange = -1100 MW
Which statement best describes the event that resulted in this data?
A) Load loss internal to the Control Area
B) Load loss external to the Control Area
C) Generation loss external to the Control Area
D) Generation loss internal to the Control Area
A Control Area experiences a disturbance which results in a violation of their operating security limits. Which Control Areas are obligated to implement actions to restore transmission security?
The Control Areas that contributed to the violations and the Control Areas affected by the violation
No Control Area has an obligation. The obligations for system restoration rest with the appropriate security coordinator
The Control Area that contributed to the operating security limit violation
