Stakeholder Comment and Rationale Form AESO AUTHORITATIVE DOCUMENT PROCESS Stakeholder Consultation Draft

Stakeholder Comment Matrix
AESO AUTHORITATIVE DOCUMENT PROCESS
Stakeholder Consultation Draft
Date: 2014-04-29
Consultation on proposed “Allowable Dispatch Variance” Amended ISO Rule Definition (“Allowable Dispatch Variance Definition Amendment”)
Date of Request for Comment [yyyy/mm/dd]:
Period of Consultation [yyyy/mm/dd]:
Comments From:
2014-04-29
2014-04-29
through
2014-05-28
Suncor Energy Products Inc.
Date [yyyy/mm/dd]:
Contact:
Cathy Cooper
Phone:
403-296-5059
E-mail:
[email protected]
June 2, 2014
Definitions – Amended
Existing
“allowable dispatch variance” means, for each
generating source asset as measured from the
dispatch quantity:
(i) plus or minus five (5) MW for a generating
source asset with a maximum capability of two
hundred (200) MW or less, or
(ii) plus or minus ten (10) MW for a generating
source asset with a maximum capability of greater
than two hundred (200) MW.
Proposed
Rationale
“allowable dispatch variance” means:
Wind aggregated generating facilities
cannot control their output when wind
speed is decreasing, but they can
control their output when wind speed is
increasing and if they are equipped with
new control technology. Accordingly,
the AESO proposes to change the
definition of “allowable dispatch
variance” to also apply to wind
aggregated generating facilities.
(i) for each generating source asset,
other than a wind aggregated
generating facility, as measured from
the dispatch quantity:
(a) plus or minus five (5) MW
for a generating source asset
with a maximum capability
of two hundred (200) MW or
less; or
(b) plus or minus ten (10)
MW for a generating source
asset with a maximum
Issued for Stakeholder Consultation: 2014-04-29
The dispatch quantity of a wind
aggregated generating facility is based
on its in-merit energy offer. If its
potential real power capability in realtime is less than the dispatch quantity,
Stakeholder Comments
and/or Alternate Proposal
1. The AESO is proposing an
Allowable Dispatch Variance
(ADV) of 5 MW above or
below the dispatch quantity
for wind facilities < 200 MW if
the potential real power is
equal or greater to the
dispatch quantity. Suncor
believes that the ADV is too
low for wind facilities of this
size. Suncor’s Wintering Hills
is an 88 MW facility consisting
of 55 - 1.6 MW turbines.
Under the AESO’s proposed
ADV of 5 MW, the variance
band is equivalent to only 3.1
AESO Reply
Page 1 of 3
capability of greater than
two hundred (200) MW;
(ii) for each wind aggregated
generating facility with a maximum
capability of two hundred (200) MW
or less:
(a) five (5) MW greater than
the dispatch quantity and
five (5) MW less than the
potential real power
capability, if the potential
real power capability is less
than the dispatch quantity;
or
the lower boundary of the allowable
dispatch variance is measured from that
potential real power capability. The
wind aggregated generating facility will
remain in compliance as long as its
output does not exceed the dispatch
quantity by more than the allowable
dispatch variance.
If the potential real power capability of
a wind aggregated generating facility is
greater than or equal to the dispatch
quantity, the allowable dispatch
variance is measured from the dispatch
quantity as it is for a generating source
asset that is not a wind aggregated
generating facility.
turbines in capacity. The
AESO’s proposed ADV does
not take into consideration
the size of the turbines at
individual wind farms. With
turbines available in the 3 to 5
MW range, wind generators
risk ADV non-compliance due
to unscheduled turbine down
time. The ADV should be a
percentage of the wind
facility’s total capacity. In the
case of Wintering Hills an ADV
of 10% would be equivalent to
8.8 MW and represents a
more reasonable operational
limit.
(b) plus or minus five (5) MW
from the dispatch quantity, if
the potential real power
capability is greater than or
equal to the dispatch
quantity; and
(iii) for each wind aggregated
generating facility with a maximum
capability of greater than two
hundred (200) MW:
(a) ten (10) MW greater than
the dispatch quantity and
ten (10) MW less than the
potential real power
capability, if the potential
real power capability is less
than the dispatch quantity;
Issued for Stakeholder Consultation: 2013-04-29
Page 2 of 3
or
(b) plus or minus ten (10)
MW from the dispatch
quantity, if the potential real
power capability is greater
than or equal to the dispatch
quantity.
Issued for Stakeholder Consultation: 2013-04-29
Page 3 of 3