PJM GO Exam Questions And Verified Detailed Answers
What is Operating reserve? - ANSWER is generation or load that can be deployed or
removed within 30 minutes of the request
What is Synchronous reserve? - ANSWER is generation or load that can be deployed or
removed removed within 10 minutes of the request, and must be electrically
synchronized
What are nonsynchronous (quick start) reserves? - ANSWER generation or load that can
be deployed or removed within 10 minutes of the request, and that is not electrically
synchronized
A unit is resource limited if it is not capable for running at rated capacity for how long? -
ANSWER more than 72 hours
If a weather alert is issued, how many hours is the minimum run time for a steam unit
before it is placed into max emergency? - ANSWER less than 32 hrs @ max cap
If a weather alert is issued, how many hrs. minimum run time for an oil, kerosene or
diesel unit before it is placed into max. emergency? - ANSWER less than 16 hrs @ max
cap
Inclement weather alert is issued, how many hours can a gas fired CT unit run at a
minimum before being put into max emergency? - ANSWER less than 8 hrs at max
capacity
What does a unit need to satisfy to be providing regulation? - ANSWER Must be capable
of receiving an AGC signal
Must be capable of responding w/i 5 minutes of signal
Sum of energy and regulation ramp rate shall not exceed eco ramp rate
,What is the maximum time limit that a maintenance outage can run for during PJM peak
period maintenance season? - ANSWER 9 days
What does generator droop setting allow? - ANSWER Lowering the generator droop
allows for greater frequency control
What is the minimum voltage level that PJM is responsible as a TO? - ANSWER PJM is
responsible for 100kV and above as well as lower facilities if requested by unit owner
When a unit data is down, how often the dispatcher must updated the failed data? -
ANSWER Every 30 minutes
What is positive ACE?-ANSWER, it means there is more power flowing from an area than
scheduled, this indicates there is more supply than demand and generation should be
brought down
What is negative ACE?-ANSWER it means more power is flowing into an area than
scheduled, this indicates there is more demand than supply and generation should be
brought up
How soon after an outage has occurred does it have to be put into eDART? - ANSWER
Immediately but cannot be submitted earlier than 72 hours in advance
How long of a notice does PJM need when trying to make a basepoint move on a self
scheduled unit? - ANSWER 20 minutes notice
What type of bias control is used by PJM? - ANSWER During normal operations PJM
uses tie line bias control
What is the regulation signal that PJM and the member sends to each other? - ANSWER
PJM sends RegA via AGC and the member sends CReg back
, What areas can a low system voltage action be declared for? - ANSWER Can be issued
for the entire PJM RTO, specific control zones or subsets of control zones
For the removal of a self scheduled unit from generation market the following must take
place. - ANSWER PJM must be given an option for takeover of the unit for the market
A Sat phone is needed for which of the following? - ANSWER All GO control centers with
one or more units totaling 500 MW or greater
What are the thresholds for a unit to be required to report real and reactive power? -
ANSWER Generators operating as capacity resources, generators 10 MW or greater,
generators greater than 1 MW but connected at 50 kV or high and solar sites 3 MW or
higher all require real and reactive power
Distributed generators less than 10 MW requires real and reactive power at BES
injection point within 10 % of settlement data
What type of relay trips when a unit suffers a loss of cooling water and temperature has
risen above a certain level? - ANSWER Thermal relay
What is the most important communication type for a unit involved in system
restoration? - ANSWER Phone communication
The TO will be responsible for the startup and loading of resources within his area
If 3 units are all available to be brought back online during a system restoration, which
unit will come first? - ANSWER First priority is unit that can be returned to service within
4 hours, next priority is units that can regulate to assure stable system frequency
What starts a cold weather alert? - ANSWER When temperature falls below 10 degrees
Fahrenheit
What starts a hot weather alert? - ANSWER When temperatures rises above 90 degrees
What is Operating reserve? - ANSWER is generation or load that can be deployed or
removed within 30 minutes of the request
What is Synchronous reserve? - ANSWER is generation or load that can be deployed or
removed removed within 10 minutes of the request, and must be electrically
synchronized
What are nonsynchronous (quick start) reserves? - ANSWER generation or load that can
be deployed or removed within 10 minutes of the request, and that is not electrically
synchronized
A unit is resource limited if it is not capable for running at rated capacity for how long? -
ANSWER more than 72 hours
If a weather alert is issued, how many hours is the minimum run time for a steam unit
before it is placed into max emergency? - ANSWER less than 32 hrs @ max cap
If a weather alert is issued, how many hrs. minimum run time for an oil, kerosene or
diesel unit before it is placed into max. emergency? - ANSWER less than 16 hrs @ max
cap
Inclement weather alert is issued, how many hours can a gas fired CT unit run at a
minimum before being put into max emergency? - ANSWER less than 8 hrs at max
capacity
What does a unit need to satisfy to be providing regulation? - ANSWER Must be capable
of receiving an AGC signal
Must be capable of responding w/i 5 minutes of signal
Sum of energy and regulation ramp rate shall not exceed eco ramp rate
,What is the maximum time limit that a maintenance outage can run for during PJM peak
period maintenance season? - ANSWER 9 days
What does generator droop setting allow? - ANSWER Lowering the generator droop
allows for greater frequency control
What is the minimum voltage level that PJM is responsible as a TO? - ANSWER PJM is
responsible for 100kV and above as well as lower facilities if requested by unit owner
When a unit data is down, how often the dispatcher must updated the failed data? -
ANSWER Every 30 minutes
What is positive ACE?-ANSWER, it means there is more power flowing from an area than
scheduled, this indicates there is more supply than demand and generation should be
brought down
What is negative ACE?-ANSWER it means more power is flowing into an area than
scheduled, this indicates there is more demand than supply and generation should be
brought up
How soon after an outage has occurred does it have to be put into eDART? - ANSWER
Immediately but cannot be submitted earlier than 72 hours in advance
How long of a notice does PJM need when trying to make a basepoint move on a self
scheduled unit? - ANSWER 20 minutes notice
What type of bias control is used by PJM? - ANSWER During normal operations PJM
uses tie line bias control
What is the regulation signal that PJM and the member sends to each other? - ANSWER
PJM sends RegA via AGC and the member sends CReg back
, What areas can a low system voltage action be declared for? - ANSWER Can be issued
for the entire PJM RTO, specific control zones or subsets of control zones
For the removal of a self scheduled unit from generation market the following must take
place. - ANSWER PJM must be given an option for takeover of the unit for the market
A Sat phone is needed for which of the following? - ANSWER All GO control centers with
one or more units totaling 500 MW or greater
What are the thresholds for a unit to be required to report real and reactive power? -
ANSWER Generators operating as capacity resources, generators 10 MW or greater,
generators greater than 1 MW but connected at 50 kV or high and solar sites 3 MW or
higher all require real and reactive power
Distributed generators less than 10 MW requires real and reactive power at BES
injection point within 10 % of settlement data
What type of relay trips when a unit suffers a loss of cooling water and temperature has
risen above a certain level? - ANSWER Thermal relay
What is the most important communication type for a unit involved in system
restoration? - ANSWER Phone communication
The TO will be responsible for the startup and loading of resources within his area
If 3 units are all available to be brought back online during a system restoration, which
unit will come first? - ANSWER First priority is unit that can be returned to service within
4 hours, next priority is units that can regulate to assure stable system frequency
What starts a cold weather alert? - ANSWER When temperature falls below 10 degrees
Fahrenheit
What starts a hot weather alert? - ANSWER When temperatures rises above 90 degrees
