NERC Questions Set 1 with Complete
Solutions19
Voltage Phase Angle - ANSWERS-What is the difference between the voltages at one point as
compared to a reference point called?
Power Angle - ANSWERS-What is the voltage phase angle difference between two points or
locations on the system?
leading, lagging - ANSWERS-MWs flow from greater ____ voltage angle to ____ voltage angle.
increases, increase - ANSWERS-As power angle ____, power transfers from generation to the
power system ____.
higher, lower - ANSWERS-Real power flows from ____ voltage angle to ____, also said to flow
downhill.
power angle, impedance - ANSWERS-The higher the voltages, the more power can be
transferred for a given ____. The smaller the ____, the greater the amount of power can be
transferred.
0 degrees. - ANSWERS-When a generator is synched to the power system and not yet putting
MWs in the system, what is the torque angle?
When more steam is put into the turbine, the rotor magnetic field moves slightly ahead of the
stator magnetic field, increasing torque angle. As torque angle increases, P must flow from the
generator to the system.
,Steady-state stability - ANSWERS-What is it called when system parameters (V,f,P flows) may be
changing but changes are small and occur gradually?
Transient stability - ANSWERS-What is the ability of a power system to overcome a sudden, large
change without violating operating limits, such as a major generator loss or severe system fault?
Transient instability - ANSWERS-What does this describe?
- when relative angular acceleration causes the power angle to exceed 90 degrees for a short
period due to an increase in power transfer
- when a disturbance causes momentary power angle excursions greater than 90 degrees
- when heavy power transfers to 1 or more transmission segments, such as generation loss
Thermal limits - ANSWERS-What is transmission line capacity determined by?
English - ANSWERS-What language does NERC require for all communications between and
among operating personnel responsible for real-time generation control and operation of the
Interconnected BES?
Written procedures - ANSWERS-What shall operators have to enable continued operation of the
system during telecomm loss that are
- available, up-to-date, organized
- easy to follow during emergencies
- located near subject
- frequently used/practiced
- ensure NERCnet information assets are adequately protected on a cost-effective basis and to a
level that allows NERC to fulfill its mission
- establish connectivity guidelines for a minimum level of security
, - mandate all NERCnet users to properly handle and protect information - ANSWERS-What are
the NERCnet Security Policy objectives?
3-part communication - ANSWERS-What does this describe?
- issue directives in a clear, concise, definitive manner
- ensure recipient repeats back correctly
- acknowledge as correct or repeat if misunderstood
responsibility and authority - ANSWERS-What does PER-001 require each BA and TOP to provide
operators with to implement real-time actions to ensure stable and reliable operation of the
BES?
Valid NERC RC certificate - ANSWERS-PER-003 requires each RC to staff real-time operator
positions performing RC reliability-related tasks with system operators who demonstrate
minimum competency in the areas listed by obtaining and maintaining what?
certified - ANSWERS-An operator may only perform functions for which he/she is ____ and may
not perform in other specialties.
Systematic Approach to Training - ANSWERS-Each RC, BA, and TOP shall use ____ to establish a
training program for BES company-specific reliability-related tasks performed by system
operators and shall implement the program.
At least one time - ANSWERS-How many times should each RC, BA, and TOP verify each system
operator has the capabilities to perform each task identified in company-specific, reliability-
related task list?
voltage, impedance, and current - ANSWERS-Which elements make up power?
Solutions19
Voltage Phase Angle - ANSWERS-What is the difference between the voltages at one point as
compared to a reference point called?
Power Angle - ANSWERS-What is the voltage phase angle difference between two points or
locations on the system?
leading, lagging - ANSWERS-MWs flow from greater ____ voltage angle to ____ voltage angle.
increases, increase - ANSWERS-As power angle ____, power transfers from generation to the
power system ____.
higher, lower - ANSWERS-Real power flows from ____ voltage angle to ____, also said to flow
downhill.
power angle, impedance - ANSWERS-The higher the voltages, the more power can be
transferred for a given ____. The smaller the ____, the greater the amount of power can be
transferred.
0 degrees. - ANSWERS-When a generator is synched to the power system and not yet putting
MWs in the system, what is the torque angle?
When more steam is put into the turbine, the rotor magnetic field moves slightly ahead of the
stator magnetic field, increasing torque angle. As torque angle increases, P must flow from the
generator to the system.
,Steady-state stability - ANSWERS-What is it called when system parameters (V,f,P flows) may be
changing but changes are small and occur gradually?
Transient stability - ANSWERS-What is the ability of a power system to overcome a sudden, large
change without violating operating limits, such as a major generator loss or severe system fault?
Transient instability - ANSWERS-What does this describe?
- when relative angular acceleration causes the power angle to exceed 90 degrees for a short
period due to an increase in power transfer
- when a disturbance causes momentary power angle excursions greater than 90 degrees
- when heavy power transfers to 1 or more transmission segments, such as generation loss
Thermal limits - ANSWERS-What is transmission line capacity determined by?
English - ANSWERS-What language does NERC require for all communications between and
among operating personnel responsible for real-time generation control and operation of the
Interconnected BES?
Written procedures - ANSWERS-What shall operators have to enable continued operation of the
system during telecomm loss that are
- available, up-to-date, organized
- easy to follow during emergencies
- located near subject
- frequently used/practiced
- ensure NERCnet information assets are adequately protected on a cost-effective basis and to a
level that allows NERC to fulfill its mission
- establish connectivity guidelines for a minimum level of security
, - mandate all NERCnet users to properly handle and protect information - ANSWERS-What are
the NERCnet Security Policy objectives?
3-part communication - ANSWERS-What does this describe?
- issue directives in a clear, concise, definitive manner
- ensure recipient repeats back correctly
- acknowledge as correct or repeat if misunderstood
responsibility and authority - ANSWERS-What does PER-001 require each BA and TOP to provide
operators with to implement real-time actions to ensure stable and reliable operation of the
BES?
Valid NERC RC certificate - ANSWERS-PER-003 requires each RC to staff real-time operator
positions performing RC reliability-related tasks with system operators who demonstrate
minimum competency in the areas listed by obtaining and maintaining what?
certified - ANSWERS-An operator may only perform functions for which he/she is ____ and may
not perform in other specialties.
Systematic Approach to Training - ANSWERS-Each RC, BA, and TOP shall use ____ to establish a
training program for BES company-specific reliability-related tasks performed by system
operators and shall implement the program.
At least one time - ANSWERS-How many times should each RC, BA, and TOP verify each system
operator has the capabilities to perform each task identified in company-specific, reliability-
related task list?
voltage, impedance, and current - ANSWERS-Which elements make up power?
