Download Document 8854955

Stakeholder Comment Matrix – March 3, 2016
Second Letter of Notice – Proposed New ISO Rule Definitions Related to Proposed New ISO Rules Section 304.5, Provision for Operation of a Transmission Facility
within Ratings (“New Section 304.5 Definitions”)
Date of Request for Comment:
Period of Comment:
March 3, 2016
March 3, 2016
Comments From:
AltaLink
Date [yyyy/mm/dd]:
March 18, 2016
through
March 18, 2016
Contact:
Rick Spyker
Phone:
43-267-3433
Email:
[email protected]
Listed below is the summary description of changes for the proposed New Section 304.5 Definitions. Please place your comments/reasons for position underneath (if any).
Definitions – New
Existing
No definition currently
exists in the ISO Rules
Original Proposed Definition
Blackline Changes Made to
Original Proposed Definition
Clean Proposed Definition
Stakeholder Comments and/or Alternate
Proposal
“emergency rating” means the
rating as defined by the
equipment owner that specifies
the level of electrical loading or
output, usually expressed in
megawatts (MW) or Mvar or other
appropriate units, that a system,
facility, or element can support,
produce, or withstand for a finite
period. The rating assumes
acceptable loss of equipment life
or other physical or safety
limitations for the equipment
involved.
“emergency rating” means the
rating as defined by the equipment
owner rating or the facility rating
that specifies the level of electrical
loading or output, usually expressed
in megawatts (MW) equipment or
Mvar or other appropriate units, that
a system, facility, or elementfacility
can support, produce, or
withstandsustain for a finitespecified
period. The rating , and takes into
account the physical or safety limits
of the equipment or facility and
assumes acceptable loss of
equipment life or facility life during
the period, as determined by the
legal owner of the equipment or
other physical or safety limitations
for the equipment involvedfacility.
“emergency rating” means the
equipment rating or the facility
rating that the equipment or facility
can sustain for a specified period,
and takes into account the physical
or safety limits of the equipment or
facility and assumes acceptable
loss of equipment or facility life
during the period, as determined by
the legal owner of the equipment
or facility.
Comment # 1: Insert Comments / Reason for
Position (if any)
For some equipment, “emergency rating” is equal to
“normal rating”. Does this contradict with the
proposed definition for emergency rating?
Issued for Stakeholder Comment: March 3, 2016
Also, different transmission facility owners have
different specified period for emergency ratings.
This results in different applications for emergency
ratings. Some emergency ratings are applicable for
planning purpose but some are only applicable in
operations coordination.
Page 1 of 3
No definition currently
exists in the ISO Rules
“normal rating” means the rating
as defined by the equipment
owner that specifies the level of
electrical loading, usually
expressed in megawatts (MW) or
other appropriate units that a
system, facility, or element can
support or withstand through the
daily demand cycles without loss
of equipment life.
“normal rating” means the rating
as defined by the equipment owner
that specifies the level of electrical
loading, usually expressed in
megawatts (MW) rating or other
appropriate units that a system, the
facility, or element can support or
withstand through the daily demand
cycles without loss of rating that
the equipment life.or facility can
sustain on a continuous basis, as
determined by the legal owner of
the equipment or facility.
“normal rating” means the
equipment rating or the facility
rating that the equipment or facility
can sustain on a continuous basis,
as determined by the legal owner
of the equipment or facility.
No definition currently
exists in the ISO Rules
New definition not previously
circulated for comment.
New definition not previously
circulated for comment.
“equipment rating” means the
maximum and minimum voltage,
current, frequency, real power flow
and reactive power flow on
individual equipment under steady
state, short-circuit and transient
conditions where applicable, as
determined by the legal owner of
the equipment.
Issued for Stakeholder Comment: March 3, 2016

Change ‘real’ power to ‘active’ power per
IEEE Standard 100-1992 (dictionary of
electrical and electronics terms).

Include ‘apparent’ power for equipment
rated on a MVA basis (e.g. transformers).

Remove ‘flow’ from ‘real power flow’ and
‘reactive power flow’ since equipment has a
rating when there is no power flow. (i.e.
change the sentence to read ….. active
power, reactive power and/or apparent
power rating of individual equipment…..)

Define ‘transient’ and its time period since
this can lead to all types of confusion
afterwards (i.e. does this mean transient
conditions during lightning strikes,
switching, transient stability, dynamic
stability, long term oscillations, resonance,
energization etc. events? these phenomena
occur over different time scales and are
considered as ‘transient’ by many)

Note that not all equipment has steady
state, short-circuit and transient ratings.
(e.g. what is the transient, apparent power
rating of a transformer?)
Page 2 of 3

No definition currently
exists in the ISO Rules
New definition not previously
circulated for comment.
Issued for Stakeholder Comment: March 3, 2016
New definition not previously
circulated for comment.
“facility rating” means the most
limiting applicable equipment
rating of the individual equipment
that comprises the facility, as
determined by the legal owner of
the facility.
Alternatively, shorten the definition to avoid
confusion. (e.g. Equipment rating means the
maximum amount of electrical power –
stated in either MW, MVAr or MVA – that a
facility is rated by the legal owner to
transmit electrical energy continuously.
Beyond this simplified definition, include a
clause where AESO can request the rating
of equipment for other, specified purposes
(e.g. special studies) such as the transient
rating of arrestors.
A clear definition of “facility” should be provided.
There is currently no definition in the “Consolidated
Authoritative Document Glossary” document. For
example what individual equipment (breaker, switch,
CT, …) comprise a transmission line as a facility?
Lack of definition can cause confusion when
defining facility borders. It is possible to leave the
definition of facility to the legal owner of the facility,
but it should be noted somewhere.
Page 3 of 3