Download Table of Reportable Event Types in NERC EOP-004

Table of Reportable Event Types in NERC EOP-004-2 Attachment 1 and Equivalent Alberta Requirements
1
NERC EOP-004-2 Event
Type
Threshold for reporting
Equivalent Alberta Requirements
Administrative Amendments / Alberta Variances
Damage or destruction of
a Facility
Damage or destruction of an
element within its Reliability
Coordinator Area, Balancing
Authority Area or Transmission
Operator Area that results in actions
to avoid a bulk electric system
emergency.
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
Administrative amendment: The AESO has changed
the wording of this event type to clarify its
understanding that a bulk electric system emergency
is a sustained outage of any combination of three (3)
or more of the following:
Damage to or destruction of a transmission facility that results in
an unexpected sustained outage of any combination of three (3)
or more of the following:
(i) transmission lines energized at greater than 25 kV; or
(ii) transformers with at least two terminals energized at greater
than 25 kV;
(i) transmission lines energized at greater than
25 kV; or
(ii) transformers with at least two terminals
energized at greater than 25 kV.
Section 304.7, Appendix 4: Events Reportable by the ISO:
Damage to or destruction of a transmission facility that results in
an unexpected sustained outage of any combination of three (3)
or more of the following:
(i) transmission lines energized at greater than 25 kV; or
Alberta variance: The AESO has included all
transmission facilities within this event type, rather
than only those facilities at the bulk electric system
level, as this is required to ensure the reliability of the
Alberta interconnected electric system.
(ii) transformers with at least two (2) terminals energized at
greater than 25 kV.
2
Damage or destruction of
a Facility
Damage or destruction of its Facility
that results from actual or suspected
intentional human action.
Section 304.7, Appendix 3: Events Reportable by a
Responsible Entity:
Damage to or destruction of a transmission facility, generating
unit, or aggregated generating facility that is part of or is directly
connected to the bulk electric system that results from actual or
suspected intentional human action.
Section 304.7, Appendix 4: Events Reportable by the ISO:
Damage to or destruction of a transmission facility, generating
unit, or aggregated generating facility that is part of or is directly
connected to the bulk electric system that results from actual or
suspected intentional human action.
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NERC EOP-004-2 Event
Type
3
Physical threats to a
Facility
Threshold for reporting
Physical threat to its Facility
excluding weather or natural disaster
related threats, which has the
potential to degrade the normal
operation of the Facility; Or
suspicious device or activity at an
Facility.
Equivalent Alberta Requirements
Administrative Amendments / Alberta Variances
Section 304.7, Appendix 3: Events Reportable by a
Responsible Entity:
A physical threat to a transmission facility, generating unit, or
aggregated generating facility that is part of or directly connected
to the bulk electric system, excluding weather or natural disaster
related threats, which has the potential to degrade the normal
operation of the transmission facility, generating unit, or
aggregated generating facility.
Section 304.7, Appendix 4: Events Reportable by the ISO:
A suspicious device or activity at a transmission facility,
generating unit, or aggregated generating facility that is part of or
directly connected to the bulk electric system.
4
Physical threats to a bulk
electric system control
center
Physical threat to its control center,
excluding weather or natural disaster
related threats, which has the
potential to degrade the normal
operation of the control centre; or
suspicious device or activity at a
BES control centre.
EOP-004-AB-2, Appendix 1: Reportable Events:
1. a physical threat to a control centre of the ISO, excluding
weather or natural disaster related threat, which has the
potential to degrade the normal operation of the control
centre of the ISO;
2. a suspicious device or activity at a control centre of the ISO
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
A physical threat to a control centre for the bulk electric system,
excluding a weather or natural disaster related threat, which has
the potential to degrade the normal operation of the control
centre.
Section 304.7, Appendix 4: Events Reportable by the ISO:
A suspicious device or activity at a control centre for the bulk
electric system.
5
Bulk electric system
emergency requiring
public appeal for load
reduction
Public appeal for load reduction
event.
EOP-004-AB-2, Appendix 1: Reportable Events:
3. a situation on the bulk electric system requiring a public
appeal for load reduction.
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NERC EOP-004-2 Event
Type
6
7
8
Threshold for reporting
Equivalent Alberta Requirements
Bulk electric system
emergency requiring
system-wide voltage
reduction
System wide voltage reduction of 3%
or more.
EOP-004-AB-2, Appendix 1: Reportable Events:
Bulk electric system
emergency requiring
manual firm load shedding
Manual firm load shedding ≥ 100
MW.
EOP-004-AB-2, Appendix 1: Reportable Events:
Bulk electric system
emergency resulting in
automatic firm load
shedding
Automatic firm load shedding ≥ 100
MW (via automatic undervoltage or
underfrequency load shedding
schemes, or remedial action
scheme). Include in the rule
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
Administrative Amendments / Alberta Variances
4. a situation on the bulk electric system emergency requiring a
system-wide voltage reduction greater than or equal to 3%.
5. a situation on the bulk electric system requiring manual firm
load shedding greater than or equal to 100 MW.
Automatic firm load shedding (via an automatic undervoltage or
underfrequency load shedding scheme, or a remedial action
scheme).
Section 304.7 Appendix 4: Events Reportable by the ISO:
Administrative amendment: All automatic firm load
shedding is required to be reported to the AESO so
the AESO can make a determination as to whether
an amount equal to or greater than 100 MW has
been shed from the Alberta interconnected electric
system, in accordance with the corresponding NERC
requirement.
Automatic firm load shedding of greater than or equal to 100 MW
(via an automatic undervoltage or underfrequency load shedding
scheme, or a remedial action scheme).
9
Voltage deviation on a
facility
Observed within its area a voltage
deviation of ± 10% of nominal
voltage sustained for ≥ 15
continuous minutes.
10
IROL violation (all
Interconnections) or SOL
violation for Major WECC
Transfer Paths (WECC
only)
Operate outside the IROL for time
greater than IROL Tv (all
Interconnections) or Operate
outside the SOL for more than
30 minutes for Major WECC
Transfer Paths (WECC only).
Alberta Variance: The AESO is of the view that event
reports regarding observed voltage deviations on a
transmission facility are of little value for reliability
purposes. The AESO will report observed voltage
deviations of ±10% of nominal voltage sustained for
greater than or equal to fifteen (15) continuous
minutes for voltages of 500 kV or higher (i.e. the
interconnection voltage level) to WECC and NERC
through its existing reporting processes, but will not
will not require such information be reported through
an authoritative provision.
EOP-004-AB-2, Appendix 1: Reportable Events:
exceeding an interconnection reliability operating limit within the
interconnected electric system for an amount of time that is
greater than interconnection reliability operating limit Tv, or
exceeding a system operating limit for a major transmission path
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Public
NERC EOP-004-2 Event
Type
Threshold for reporting
Equivalent Alberta Requirements
Administrative Amendments / Alberta Variances
identified in the table “Major WECC Transfer Paths in the Bulk
Electric System”, as provided by the WECC, for more than thirty
(30) minutes.
11
12
Loss of firm load
System separation
(islanding)
Loss of firm load for ≥ 15 minutes:
≥ 300 MW for entities with previous
year’s demand ≥ 3,000 MW; or
≥ 200 MW for all other entities
EOP-004-AB-2, Appendix 1: Reportable Events:
Each separation resulting in an
island ≥ 100 MW.
EOP-004-AB-2, Appendix 1: Reportable Events:
6. a loss of firm load greater than or equal to 300 MW for 15
minutes or more;
7. an unintended transmission system separation within the
interconnected electric system that results in an island of
greater than or equal to 100 MW, excluding an island created
by the loss of:
Administrative amendment: The AESO has not
included the reference to the previous years’ demand
being greater than or equal to 3,000 MW, as demand
on the Alberta interconnected electric system is
greater than 3,000 MW.
Alberta variance: The loss of the interconnection is
not considered a reportable event. NERC has
removed Alberta separation from Event Analysis as
the event happens regularly and the implications are
well understood.
a) a transmission system radial connection;
b) non-transmission system facilities (distribution level); or
c) the interconnection.
13
14
Generation loss
Transmission loss
Total generation loss, within one
minute, of :
≥ 2,000 MW for entities in the
Western Interconnection
EOP-004-AB-2, Appendix 1: Reportable Events:
Unexpected loss within its area,
contrary to design, of three or more
bulk electric system elements
caused by a common disturbance
(excluding successful automatic
reclosing).
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
8. total generation loss, within one (1) minute, of greater than or
equal to 2000 MW.
Unexpected loss contrary to design, of any combination of
three (3) or more of the following:
(i) transmission lines energized at greater than 25 kV; or
(ii) transformers with at least two terminals energized at greater
than 25 kV
Alberta variance: The AESO has changed the
wording of this requirement to limit reporting to the
identified facilities
Alberta variance: The AESO has included the
indicated transmission facilities, rather than only
those facilities at the bulk electric system level, as
this is required to ensure the reliability of the Alberta
interconnected electric system.
caused by a common disturbance (excluding successful
automatic reclosing).
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Public
NERC EOP-004-2 Event
Type
Threshold for reporting
Equivalent Alberta Requirements
Administrative Amendments / Alberta Variances
Section 304.7, Appendix 2: Events Reportable by the ISO:
An unexpected outage impacting two (2) or more generating units
or aggregated generating facilities with an aggregate gross
generation exceeding 500 MW at the time of the outage, which is
caused by a common disturbance and contrary to the design of
the generating unit(s).
Section 304.7, Appendix 4: Events Reportable by the ISO:
Unexpected loss contrary to design, of any combination of
three (3) or more of the following:
(i) transmission lines energized at greater than 25 kV; or
(ii) transformers with at least two (2) terminals energized at
greater than 25 kV
caused by a common disturbance (excluding successful
automatic reclosing).
15
Unplanned control centre
evacuation
Unplanned evacuation from a bulk
electric system control centre for 30
continuous minutes or more.
EOP-004-AB-2, Appendix 1: Reportable Events:
9. an unplanned evacuation of the control centre of the ISO for
thirty (30) continuous minutes or more.
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
An unplanned evacuation of a control centre of a transmission
facility for thirty (30) continuous minutes or more.
Section 304.7, Appendix 2: Events Reportable by the Operator
of a Generating Unit or an Aggregated Generating Facility:
An unplanned evacuation of a control centre of a generating unit
or an aggregated generating facility for thirty (30) continuous
minutes or more.
Section 304.7, Appendix 4: Events Reportable by the ISO:
An unplanned evacuation of a control centre of a transmission
facility for thirty (30) continuous minutes or more.
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NERC EOP-004-2 Event
Type
16
Complete loss of voice
communication capability
Threshold for reporting
Complete loss of voice
communication capability affecting a
bulk electric system control centre
for 30 continuous minutes or more.
Equivalent Alberta Requirements
Administrative Amendments / Alberta Variances
EOP-004-AB-2, Appendix 1: Reportable Events:
10. a complete loss, for thirty (30) continuous minutes or more, of
voice communication systems for the control centre of the
ISO.
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
A complete loss, for thirty (30) continuous minutes or more, of
voice communication systems for a control centre of a
transmission facility.
Section 304.7, Appendix 2: Events Reportable by the Operator
of a Generating Unit or an Aggregated Generating Facility:
A complete loss, for thirty (30) continuous minutes or more, of
voice communication systems for a control centre of a generating
unit or an aggregated generating facility.
Section 304.7, Appendix 4: Events Reportable by the ISO:
A complete loss, for thirty (30) continuous minutes or more, of
voice communication systems for a control centre of a
transmission facility.
17
Complete loss of
monitoring capability
Complete loss of monitoring
capability affecting a bulk electric
system control center for 30
continuous minutes or more such
that analysis capability (i.e., State
Estimator or Contingency Analysis)
is rendered inoperable.
EOP-004-AB-2, Appendix 1: Reportable Events:
11. a complete loss of monitoring capability affecting the control
centre of the ISO for thirty (30) continuous minutes or more
that renders analysis capability, such as state estimator or
contingency analysis, inoperable.
Section 304.7, Appendix 1: Events Reportable by the Operator
of a Transmission Facility:
A loss of monitoring or control that significantly affects the ability
of the operator of a transmission facility to make operating
decisions for thirty (30) continuous minutes or more, including:
(i) loss of the ability to remotely monitor or control system
elements of the bulk electric system;
(ii) loss of communications from supervisory control and data
acquisition remote terminal units;
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Administrative amendment: The AESO provided
clarity regarding monitoring capability that affects the
bulk electric system.
Public
NERC EOP-004-2 Event
Type
Threshold for reporting
Equivalent Alberta Requirements
Administrative Amendments / Alberta Variances
(iii) unavailability of inter control centre protocol links reducing
bulk electric system visibility; or
(iv) loss of the ability to remotely monitor and control generating
units providing regulating reserves.
Section 304.7, Appendix 2: Events Reportable by the Operator
of a Generating Unit or an Aggregated Generating Facility:
A loss of monitoring or control that significantly affects the ability
of the operator of a generating unit or the aggregated generating
facility to make operating decisions for thirty (30) continuous
minutes or more, including:
(i) loss of the ability to remotely monitor or control generating
units connected to the bulk electric system;
(ii) loss of communications from supervisory and data acquisition
remote terminal units;
(iii) unavailability of inter control centre protocol links reducing
visibility of generating units connected to the bulk electric
system; or(iv) loss of the ability to remotely monitor and
control generating units providing regulating reserves.
Section 304.7, Appendix 4: Events Reportable by the ISO:
A loss of monitoring or control that significantly affects the ability
of the operator of a transmission facility to make operating
decisions for thirty (30) continuous minutes or more, including:
(i) loss of the ability to remotely monitor or control system
elements of the bulk electric system;
(ii) loss of communications from supervisory control and data
acquisition remote terminal units;
(iii) unavailability of inter control centre protocol links reducing
bulk electric system visibility; or
(iv) loss of the ability to remotely monitor and control generating
units providing regulating reserves.
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