Stakeholder Comment and Rationale Form
AESO AUTHORITATIVE DOCUMENT PROCESS
Stakeholder Consultation Draft
Date: 2011-09-20
New and Amended ISO Rules Definitions
Date of Request for Comment [yyyy/mm/dd]:
2011-09-20
Stakeholder Comment and Rationale Form
Period of Consultation [yyyy/mm/dd]: 2011-09-20
through 2011-10-17
Comments
From: Company
NamePROCESS
AESO
AUTHORITATIVE
DOCUMENT
Date [yyyy/mm/dd]:
Stakeholder Consultation Draft
2010-12-16
Definitions – New
Reconsultation
on New ISO Rules Section
502.2 Version 2.0
Existing
Proposed
Contact:
Company Contact
Phone:
Contact Phone Number
E-mail:
Rationale
No definition currently exists in the ISO
Rules
“Alberta interchange capability” means the
amount of interconnected electric system
transmission capability the ISO determines is
available for allocation to all transfer paths,
after subtracting amounts for relevant factors
including system operating limits,
generating capacity and Alberta internal
load.
Definitions - Amended
Existing
“Alberta interchange capability” means the
amount of interconnected electric system
transmission capability the ISO determines is
available for allocation to all transfer paths,
after subtracting amounts for relevant factors
including system operating limits, generating
capacity and Alberta internal load.
The AESO did not receive
any stakeholder
comments on this
definition in the last
consultation and so, the
AESO is not proposing
any further changes from
the initial consultation.
Proposed
Rationale
Issued for Stakeholder Consultation: 2011-09-20
Stakeholder Comments and/or
Alternate Proposal
Comment # 1: Insert Comments /
Reason for Position (if any)
AESO Reply
Stakeholder Comments and/or
Alternate Proposal
AESO Reply
Page 1 of 3
Comment # 2: Insert Comments /
Reason for Position (if any)
“available transfer capability” means the
amount of total transfer capability the ISO
determines is available for interchange
transactions over a single transfer path after
subtracting any transmission reliability
margin relevant to the transfer path.
“available transfer capability” means the
remaining transfer capability the ISO
determines can be commercially available for
transfers over the interconnected transmission
network over and above already committed
uses, and is calculated as the total transfer
capability minus the sum of any applicable
transmission reliability margin and existing
transmission commitments.
As a result of stakeholder
comments, the AESO has
updated the definition of
“available transfer
capability” to improve
clarity and more closely
align it with the NERC
definition.
“e-tag” means an electronic identifier which
contains specific transactional information,
necessary for scheduling an interchange
transaction.
“e-tag” means an electronic identifier which
contains specific transactional information,
necessary for scheduling an interchange
transaction.
Stakeholder did not
identify any specific
deficiencies in the
proposed definition.
Therefore, the AESO is
not proposing any further
changes.
“interchange schedule” means the net sum
of the import and export interchange
transactions for a given settlement interval
as agreed between the ISO and the relevant
adjacent balancing authority.
“interchange schedule” means, for a given
settlement interval, the planned interchange
of electricity between the ISO and an adjacent
balancing authority which results from the
implementation of interchange transactions.
Stakeholder did not
identify any deficiencies
in the proposed definition.
However, based on
further internal review, the
AESO is proposing
further amendments to
clarify the meaning of the
term “interchange
schedule”.
“total transfer capability” means the amount
of transmission capability the ISO determines
is available for importing or exporting energy
over a single transfer path in a reliable
manner after subtracting amounts required for
“total transfer capability” means the amount
of real power the ISO determines can be
reliably transferred over the interconnected
transmission network under specified system
conditions.
As a result of stakeholder
comments, the AESO has
updated the definition of
“total transfer capability”
to improve clarity and
Issued for Stakeholder Consultation: 2011-09-20
Page 2 of 3
contingencies and conditions relevant to the
transfer path.
more closely align with
the NERC definition.
“transmission reliability margin” means the
amount of available transfer capability, the
ISO determines is necessary to ensure that
the reliability of the interconnected electric
system is maintained under a reasonable
range of uncertainties in operating conditions.
“transmission reliability margin” means the
amount of transfer capability the ISO
determines is necessary to ensure the reliable
operation of the interconnected electric
system taking into account uncertainties in
system conditions and the need for operating
flexibiltiy.
As a result of stakeholder
comments, the AESO has
updated the definition of
“transmission reliability
margin” to improve clarity
and more closely align
with the NERC definition.
“wheel through transaction” means an
interchange transaction that:
“wheel through transaction” means an
interchange transaction that:
(a) is represented by a single e-tag;
(a) is represented by a single e-tag;
(b) is comprised of an import offer over
one transfer path and an export bid
over a different transfer path that
specify quantities equal to one
another; and
(b) is comprised of an import offer over
one transfer path and an export bid
over a different transfer path that
specify quantities equal to one
another; and
The AESO did not receive
any stakeholder
comments on this
definition in the last
consultation and so the
AESO is not proposing
any further changes.
(c) originates and terminates outside of
the Alberta balancing authority
area.
(c) originates and terminates outside of
the Alberta balancing authority area.
Definitions – Removed
Existing
Proposed
Issued for Stakeholder Consultation: 2011-09-20
Rationale
Stakeholder Comments and/or
Alternate Proposal
Comment # 2: Insert Comments /
Reason for Position (if any)
AESO Reply
Page 3 of 3