PJM Generation Dispatcher Exam
Practice Questions and Answers
A unit running for transmission congestion is subject to what? - ANSWER-Price cost
capping
ACE - Area Control Error is used to balance what 2 things? - ANSWER-Generation and
Load
An EXCITER on a traditional generator does what? - ANSWER-Voltage regulation
(AVR) if you change the excitation current, you change the voltage.
Black start unit must be able to close onto a dead bus in how many hours? - ANSWER-
3
During restoration what is the frequency control range? - ANSWER-59.75 - 61.0 Hz
Eco Min, Eco Max, and Emerg max are all generator ______________ . - ANSWER-
Limits
ECO Min, ECO Max, and EMERG Max are genrator _________________. - ANSWER-
Limits
GMD (GeoMagnetic Disturbance) procedure is implemented when? - ANSWER-10A or
greater is measured by special equipment at Missouri Ave or Meadowbrook and the
measurement is confirmed by one of the following other sources: Excess transformer
current @ Meadowbrook, Beddington, Donbs, or Black Oak, high MVAR requirements
on transformers @ Hopw Creek or Salem nuclear subs, or high DC measurements @
Limerick or Peach Bottom.
How long is a maintenance outage during non-Peak Period Maintenance? - ANSWER-
Unlimited
How long is a maintenance outage during PPM- Peak Period Maintenance? -
ANSWER-9 days
How many Black Start units are required for critical load/TO zone? - ANSWER-2 Black
Start units
How many days prior must you put in for a reactive capability test request in eDart? -
ANSWER-No later than 3 business days prior to the test.
How many hours do you have to report a 24-hr reportable NERC disturbance? -
ANSWER-6 hours
, How much notification is required to bring a self-scheduled unit online? - ANSWER-20
min
How often are Black Start units tested? - ANSWER-Yearly/annualy
How often does a generator owner need to report restoration information via restoration
form? - ANSWER-Hourly
How often does transmission owner need to report restoration information? - ANSWER-
Every 30 min or 10 lines restored
How often is generator reactive capability testing required? - ANSWER-Every 5 yrs.
How often must PJM be updated for manually entered data? - ANSWER-30 min
If a generator is under excited, (-) value, absorbing VAR's is it leading or lagging? -
ANSWER-Leading
If your ACE in your control area is -1500, what would you do? - ANSWER-100%
spinning (synchronized) reserves
Operating reserves consists of what? - ANSWER-Synchronized reserves, non-
synchronized reserves (quick start), and supplemental reserves (secondary)
PJM calls and instructs you to increase MVAR output for voltage support by 50 MVAR.
What do you do? - ANSWER-Look at "D" curve and decrease your MW output to a level
that will increase reactive power output by 50 MVAR.
PJM instructs your Generator to come online. From what time to the time it is running? -
ANSWER-Notification time + Time to start
PJM issues a Heavy Load Voltage Warning how many hours prior to implementation? -
ANSWER-4 hours
PJM requires generators that are greater than what level to follow a voltage schedule? -
ANSWER-20 MVA or aggregated 75 MVA
PJM sends what signals to Market Operation Centers? - ANSWER-ACE, Regulation,
and Dispatch
Planned outages are submitted no later than? - ANSWER-30 days
Regulating units (demand response resources) provide a variable amount of generation
under automatic control to provide what? - ANSWER-Correction for small deviations in
load.
Practice Questions and Answers
A unit running for transmission congestion is subject to what? - ANSWER-Price cost
capping
ACE - Area Control Error is used to balance what 2 things? - ANSWER-Generation and
Load
An EXCITER on a traditional generator does what? - ANSWER-Voltage regulation
(AVR) if you change the excitation current, you change the voltage.
Black start unit must be able to close onto a dead bus in how many hours? - ANSWER-
3
During restoration what is the frequency control range? - ANSWER-59.75 - 61.0 Hz
Eco Min, Eco Max, and Emerg max are all generator ______________ . - ANSWER-
Limits
ECO Min, ECO Max, and EMERG Max are genrator _________________. - ANSWER-
Limits
GMD (GeoMagnetic Disturbance) procedure is implemented when? - ANSWER-10A or
greater is measured by special equipment at Missouri Ave or Meadowbrook and the
measurement is confirmed by one of the following other sources: Excess transformer
current @ Meadowbrook, Beddington, Donbs, or Black Oak, high MVAR requirements
on transformers @ Hopw Creek or Salem nuclear subs, or high DC measurements @
Limerick or Peach Bottom.
How long is a maintenance outage during non-Peak Period Maintenance? - ANSWER-
Unlimited
How long is a maintenance outage during PPM- Peak Period Maintenance? -
ANSWER-9 days
How many Black Start units are required for critical load/TO zone? - ANSWER-2 Black
Start units
How many days prior must you put in for a reactive capability test request in eDart? -
ANSWER-No later than 3 business days prior to the test.
How many hours do you have to report a 24-hr reportable NERC disturbance? -
ANSWER-6 hours
, How much notification is required to bring a self-scheduled unit online? - ANSWER-20
min
How often are Black Start units tested? - ANSWER-Yearly/annualy
How often does a generator owner need to report restoration information via restoration
form? - ANSWER-Hourly
How often does transmission owner need to report restoration information? - ANSWER-
Every 30 min or 10 lines restored
How often is generator reactive capability testing required? - ANSWER-Every 5 yrs.
How often must PJM be updated for manually entered data? - ANSWER-30 min
If a generator is under excited, (-) value, absorbing VAR's is it leading or lagging? -
ANSWER-Leading
If your ACE in your control area is -1500, what would you do? - ANSWER-100%
spinning (synchronized) reserves
Operating reserves consists of what? - ANSWER-Synchronized reserves, non-
synchronized reserves (quick start), and supplemental reserves (secondary)
PJM calls and instructs you to increase MVAR output for voltage support by 50 MVAR.
What do you do? - ANSWER-Look at "D" curve and decrease your MW output to a level
that will increase reactive power output by 50 MVAR.
PJM instructs your Generator to come online. From what time to the time it is running? -
ANSWER-Notification time + Time to start
PJM issues a Heavy Load Voltage Warning how many hours prior to implementation? -
ANSWER-4 hours
PJM requires generators that are greater than what level to follow a voltage schedule? -
ANSWER-20 MVA or aggregated 75 MVA
PJM sends what signals to Market Operation Centers? - ANSWER-ACE, Regulation,
and Dispatch
Planned outages are submitted no later than? - ANSWER-30 days
Regulating units (demand response resources) provide a variable amount of generation
under automatic control to provide what? - ANSWER-Correction for small deviations in
load.
