515 SOUTH AREA OPERATION

Operating Policies and Procedures
Transmission
OPP 515
Filed with Commission: XXXX
Supersedes YYYYY
515 SOUTH AREA OPERATION
External Consultation Draft
Version 2.0
June 16, 2011
1.
Purpose
These ISO rules set out the requirements for:
2.
(a)
(a)
the ISO and certain market participants, and specifically the legal owners
and operators of any wind aggregated generating facilities, generating units or
transmission facilities, to reliably manage and operate the South Alberta area of
the interconnected electric system during a period of a transmission constraint
in that area; and
(b)
(b)
the ISO to implement certain wind power management provisions
allowingthrough the ISO to calculate calculation of a real power limit and allocate it
to any for all Alberta wind production, and the allocation of that limit to certain nonexempt wind aggregated generating facility facilities in the South Alberta area,
when the interconnected electric system cannot absorb the total Alberta real
power increase due toincreases caused by the ramping up of all Alberta wind
aggregated generating facilities operating in Alberta.
Background
(1) The SW 240kV upgrade in the South Alberta area removes some of the operational
complexities in that area. RemedialGeneration curtailment and remedial action
schemes continue to be required to run-back or trip generation MW output in response to
adverse operating or interconnected electric systemtransmission constraint
conditions.
(2) The 893L remedial action scheme monitors and prevents overloads on 893L
affecting the output from Summerview #2. The remaining remedial action schemes in
these ISO rules reduce bulk transmission line overloads to ensure that load is served in
the Pincher Creek area and to support the 69kV transmission system in the South
Alberta area. Remedial action schemes for the Lethbridge area in other ISO rules
provide additional protection to the 69kV transmission system in the South Alberta area.
(3(2) If a remedial action scheme is not triggered or is rendered partially or completely
inoperable, then the ISO must intervene to remove overloads on transmission facilities
and, in general, to maintain the reliability and safety of the interconnected electric
system in the South Alberta area.
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OPP 515 South Area Operation
(43) The South Alberta area wind aggregated generating facilities and generating
units are illustrated in Figure 1 and . Figure 2Table 1. Table 1 and Table 2 list the
remedial action schemes and the affected lists the South Alberta area wind aggregated
generating facilities associated with eachand generating units, and Table 2 lists the
remedial action schemes for the South Alberta area.
1H
2H
3H
4H
(54) The ISO must also manage the rapid increases in the total amount of real power
generated from the ramping up of wind aggregated generating facilities in Alberta that
cannot otherwise be managed under other ISO rules such as those pertaining to energy
market merit order procedures.
The provisions of subsection 3.3 are intended to
(6) These ISO rules therefore(5)
temporarily limit the ramp ratesramping up and real power output of anyall non-exempt
wind aggregated generating facilityfacilities operating in the South Alberta area, until
the ISO determines that the interconnected electric system canis able to accommodate
the total amount ofAlberta real power amount generated from all wind aggregated
generating facilities in Alberta.
5H
3.
3B
Policy
3.1
8B
Transmission System ConstraintsConstraint Management
(1) The ISO must mitigate transmission system overloads caused by a single
contingency by curtailing real power generation through the operation of remedial
action schemes or, by issuing directives to assets effective in managing the
transmission constraint, or by both means as applicable to the particular situation.
(2) After a remedial action scheme has operated in the South Alberta area, the ISO
must issue directives to curtail all generating units and wind aggregated generating
facilities effective in managing the transmission constraint on a pro-rated basis, using
the actual real power output at the time of the remedial action scheme operation.
(3) All wind aggregated generating facilities in the South Alberta area must comply
with voltage reliability directives, except for the following wind aggregated generating
facilities, as represented by their asset descriptions: Castle River, Cowley Ridge,
McBride Lake, and Taylor Chute.
(4) The ISO will only issue one directive to each of the following wind aggregated
generating facilities:
3.2
9B
(a)
Summerview #1 and #2; and
(b)
Ardenville and Blue Trail.
Additional Remedial Action Scheme and Wind Aggregated Generation Facility
Operating Requirements
(1) The operator of anya wind aggregated generating facility must notify the ISO
before the operator closes a breaker at the applicable point of connection, energizes
the collector bus feeder after an outage, or increases generation output after being
tripped or runback.
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OPP 515 South Area Operation
(3) If there is a2) For the loss of any component or all components of a remedial
action scheme, the ISO must carry out a real-time assessment and must develop and
implement a mitigation plan to effectively mitigate the loss.
(4)
Subject to subsection 3.1(5), all wind aggregated generating facilities in the South
Alberta area must comply with voltage reliability directives.
(5) Subsection 3.1(4) does not apply to the following wind aggregated generating
facilities, as represented by their asset descriptions: Castle River, Cowley Ridge,
McBride Lake, and Taylor Chute.
(6(3) The ISO must issue a directive to the operator of an applicable transmission
facility to open the connecting breakers of any wind aggregated generation facility in
order to maintain reliability of the interconnected electric system or to protect
interconnected electric system facilities if generation MW output cannot be curtailed
within ten (10) minutes. The after the receipt of a directive from the ISO, and that
operator must not close the connecting breakers again without approval from the ISO.
3.23 Wind Power Ramp Up Management
(1) This subsectionSubsection 3.23 does not apply to the following exempt wind
aggregated generating facilities in the South Alberta area, as represented by their asset
descriptions: Castle River #1, Cowley Ridge, Kettles Hill, Magrath, McBride Lake,
Summerview #1 and Taylor Chute.
(2) Prior to issuing any directive curtailing real power output from any non-exempt wind
aggregated generating facility in the South Alberta area, under subsection (6), the ISO
must first must use the energy market merit order procedures for energy balance to
manage the ramping up of the total real power output from all exempt and non-exempt
wind aggregated generating facilities in Alberta.
(3) If the energy market merit order procedures are insufficient to manage the
ramping up andof the associatedtotal real power output from all exempt and non-exempt
wind aggregated generating facilities in Alberta, then the ISO must limit thethat total
Alberta real power output for all of those wind aggregated generating facilities, and in
accordance with this subsection 3.2 specify a wind power limit pro rata share for each non
exempt wind aggregated generating facility in the South Alberta area and in the other
areas of Alberta.
(4) The ISO must calculate, at a minimum wind monitoring interval of every twenty (20)
minutes, thean Alberta system wind power limit by using the total Alberta real power
output limit from all exempt and non-exempt wind aggregated generating facilities in
Alberta.
(5) The Alberta system wind power limit in MW for ana wind monitoring interval will be
the greater of (a) and (b), calculated as follows:
(a)
(i)
3.2
the total Alberta real power output from all Alberta exempt and nonexempt wind aggregated generating facilities referred to in subsection
(4);
plus
(ii)
the ISO estimates in MW of:
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OPP 515 South Area Operation
(A)
the ramp rate-down capability, in MW per minute, of all assets in
the energy market merit order for the wind monitoring interval;
(B)
any increases or decrease in the Alberta internal load for the wind
monitoring interval;
(C)
any increases or decreases in any interchange schedule
quantities at the ME 01 to ME10 10 minute clock period for the
wind monitoring interval;
plus
plus
(b)
(i)
3.2
the total Alberta real power output from all Alberta exempt and nonexempt wind aggregated generating facilities referred to in subsection
(4);
plus
(ii)
six point five (6.5) MW per minute for the wind monitoring interval.
(6) Prior to the system wind power limit being exceeded by Subject to subsection (7), if
the total Alberta real power output at any time is at ninety (90) percent or within 65 MW of
the Alberta system wind power limit during a settlementwind monitoring interval, then the
ISO must issue a directivedirectives by means of Supervisory Control and Data
Acquisition signals to each operator of aeach non-exempt wind aggregated generating
facility in the South Alberta area, specifying and in other areas of Alberta, which signals
will set the wind power limit pro rata share for that each non-exempt wind aggregated
generating facility.
(7) The ISO, based on operational experience with the implementation of the Alberta
system wind power limit procedures after the effective date of these ISO rules, may vary
the tolerances set out in subsection (6) and give written notice of that variance to the legal
owners of all wind aggregated generating facilities in the South Alberta area.
(8) The wind power limit pro rata share for each non-exempt wind aggregated
generating facility in the South Alberta areaas may be required for any wind monitoring
interval is equal to:
(a)
the potential real power capability of the wind aggregated generating facility
as filed with the ISO by the legal ownerprovided to the ISO under subsection
24(b) of section 502.1 of the ISO rules, Wind Aggregated Generating Facilities
Technical Requirements;
divided by
(b)
the sum of the all potential real power capabilities of all provided to the ISO
under that subsection 24(b) for all Alberta non-exempt wind aggregated
generating facilities in Alberta as required to be filed by the legal owners
under the ISO rules;
multiplied by
(c)
the difference for the wind monitoring interval between:
(i)
the Alberta system wind power limit. calculated under subsection (5); and
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OPP 515 South Area Operation
(8)
The operator(ii) the total real power output from all wind aggregated
generating facilities in Alberta.
(9) Subject to the tolerances set out in subsection 18 of anysection 502.1 of the ISO
rules, Wind Aggregated Generating Facilities Technical Requirements, a non-exempt
wind aggregated generating facility must, by means of a Supervisory Control and Data
Acquisition signal to the ISO, comply with a wind power limit pro rata share directive
signal no later than ten (10) minutes after the ISO has sent itthe signal, and no wind
aggregated generating facility may generate an amount of real power output in excess
of the wind power limit pro rata share specified in thatwhile the directive while it is in
effect.
(910) The ISO must cancel allby means of a Supervisory Control and Data Acquisition
signal a wind power limit pro rata share directivesdirective when the system wind power
limit no longer is exceeded.
(1011) If at any one time any non-exempt wind aggregated generating facility is
constrained in real power output by multiple concurrent directives fromboth:
(a)
a directive issued by the ISO, including those for a local due to a
transmission constraint, or the determination of; and
(b)
a directive requiring compliance with a wind power limit pro rata share
requirement, ;
then the operator must comply with the lowestlower output MW limit of allthe two (2) limits
specified in thethose directives.
(1112) If the ISO issues a directive to the operator of any wind aggregated generating
facility that results in a net increase in the real power input, then the ramp rate in MWs
per minute must not exceed ten percent (10%) of maximum authorized real power.
4.
Responsibilities
4.1
ISO
(1) If under subsection 3.1 the ISO cannot determine that the risk to the interconnected
electric system is low from a complete or partial component loss of a remedial action
scheme, then the ISO mustmay:
(2)
(a)
(a) manually implement the mitigating actions of thethat remedial action
scheme if any automatic functionality for that remedial action scheme
functionality is unavailable, and issue directives effecting curtailments as
required to maintain reliability; or
(b)
issue a directive curtailing specificany wind aggregated generating facilities
that is part of that remedial action scheme to zero (0) MW as required, until
the constraint problem is resolved or the wind aggregated facilities are again
a functioning part of the remedial action scheme.
For voltage or reliability issues, the ISO must:
(a)
(a) subject to subsection 3.1(5),3.1(3), issue voltage directives to the
operators of wind aggregated generating facilities and generating units
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OPP 515 South Area Operation
that are effective in managing voltage levels to operate their voltage
regulating systems as required; and
(b)
(b) issue directives to the operators of wind aggregated generating
facilities, generating units and transmission facilities, as applicable; that
are effective in managing the transmission constraint to curtail generation
MW output or remove transmission facilities as required to maintain
reliability.
(3) With regard to wind power management under subsection 3.23 the ISO must
calculate:
4.2
(a)
(a)
the system wind power limit; and
(b)
(b) the wind power limit pro rata shares and issue related directives in
accordance with that subsection.
OperatorsOperator of any Wind Aggregated Generating Facility andor any
Generating Unit Under Transmission System Constraint Conditions
With regard to transmission constraint conditions under subsection 3.1, each operator of
a generating unit or any wind aggregated generating facility must:
(1)
obtain approval from the ISO prior to:
(a)
(a)
reconnecting to the interconnected electric system;
(b)
(b) after a forced outage or planned outage, closing the collector bus
breakers or connection breakers to any feeder in the wind aggregated
generating facility collector bus system after a forced outage or planned
outage; or
(c)
(c) increasing generation real power output after being tripped or runback
due to the operation of a remedial action scheme or after being curtailed by a
directive;
(2) within ten (10) minutes of being issued a directive to curtail generation, curtail
generation MW output to the MW level identified in a directive to curtail generation, within
ten (10) minutes of being issued that directive;
(3) limit the generation real power output to the level identified in that directive during
the time the directive is in effect;
(4) within ten (10) minutes of being issued a directive for voltage adjustments, comply
with that directive; and
(5) inform the ISO immediately if they are unable to comply with a directive within ten
(10) minutes of being issued thethat directive, and provide reasons and an estimated time
required to comply with the directive.
4.3
Legal OwnerOperator of a Transmission Facility Under Transmission
Constraint Conditions
With regard to transmission constraint conditions under subsection 3.1, the legal
owneroperator of a transmission facility must:
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OPP 515 South Area Operation
(1) take immediate action to operate the transmission facility in a manner that protects
their equipment and personnel, the public and the environment, and notify the ISO of
these actions as soon as possible;
(2) comply with any directive from the ISO to remove any real power generation by
opening connection breakers or removing transmission facilities associated with wind
aggregated generating facilities; and
(3) obtain approval from the ISO before closing the connection breakers of any wind
aggregated generating facilitiesfacility.
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OPP 515 South Area Operation
5.
Figures and Tables
Figure 1 South Alberta Area Wind Aggregated Generating Facilities and Generating Units
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Operating Policies and Procedures
Transmission
OPP 515
Filed with Commission: XXXX
Supersedes YYYYY
Table 1
South Area Wind Aggregated Generating Facilities
and Generating Units
Generator
Ardenville
Operator
Substation
Maximum Capability
TransAlta
418S
69
Castle Rock Ridge Corp.
205S
115
Blue Trail
TransAlta
528S
66
Summerview #2
TransAlta
354S
66
Castle Rock Ridge
Old Man River Wind
Old Man 2 Wind Farm Ltd.
112S
46
Soderglen
TransAlta
243S
70.5
Kettles Hill
ENMAX
383S
63
TransAlta
354S
68.4
ENMAX
C134S
80
Suncor
139S
30
Suncor
226S
30
Irrican Hydro
Irrigation Canal Power
Cooperative Ltd.
67S
(25 kV)
McBride Lake
TransAlta
240S
75.2
Taylor (wind)
TransAlta
Taylor
3.4
Raymond Reservoir
Irrigation Canal Power
Cooperative Ltd.
T313S
18
Chin Chute Hydro
Irrigation Canal Power
Cooperative Ltd.
T315S
11
Old Man River Hydro
ATCO
A806S
32
Drywood Power Plant
Bow Ark
T415S
6
Taylor Chute Hydro
TransAlta
Taylor Hydro
12
Cowley Ridge
TransAlta
322S
40.775
Castle River
TransAlta
239S
39.54
Belly River Chute
TransAlta
229S
2.9
St. Mary’s Hydro
TransAlta
385S (25 kV)
2.4
Waterton Hydro
TransAlta
415S (25kV)
2.5
Summerview #1
ENMAX Taber
Suncor Chin Chute
(Hillridge substation)
Magrath
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OPP 515 South Area Operation
Table 2
Remedial Action Schemes In Effect
In the South Alberta area
South Area RAS
#
RAS Monitoring Point
Affected Generation
1
At Coleman 786L (T799S – BCTC Natal)
Summerview #2, Summerview #1, Blue Trail, Ardenville,
Kettles Hill, and Soderglen
2
At Goose Lake 103S 893L (T103S)
Summerview #2,
3
At Goose Lake T103S 616L Terminal
Ardenville, Blue Trail, Soderglen
4
At Peigan 59S 616L Terminal
Summerview #2, Kettles Hill, Summerview #1
5
At Peigan T59s transformer T1
Ardenville, Blue Trail, Summerview #2,
6
At Spring Coulee 225L West, (385S – 229S)
None. Trips 385S225W to remove the overload
7
At Magrath or Riverbend 863L or
Magrath Garden City
8
Loss of the Magrath 225S transformer T1
Taylor Chute, Taylor Hydro
56. Revision History
Issued
Description
2011-xx-xx
Supersedes 2010-10-13
2010-10-13
Supersedes 2009-12-15
2009-12-15
Supersedes 2009-09-04
2009-09-04
Supersedes 2008-07-28
2008-07-28
Supersedes 2007-09-27
2007-09-27
Supersedes 2007-06-14
2007-06-14
Supersedes 2007-03-15
2007-03-15
Supersedes 2006-09-29
2006-09-29
Supersedes interim OPP effective 2006-08-09
2006-08-09
Approved for interim implementation, supersedes 2006-04-27
2006-04-27
Supersedes revised interim OPP effective 2005-07-27
2005-07-27
Supersedes revised interim OPP effective 2005-06-14
2005-06-14
Supersedes interim OPP effective 2005-06-03
2005-06-03
Supersedes OPP effective 2004-10-14
2004-10-14
Supersedes interim OPP effective 2004-07-30
2004-07-30
Approved for interim implementation, effective 2004-07-30
New issue
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OPP 515 South Area Operation
6.
Figures
Figure 1
South Alberta Area Wind Aggregated generating facilities and Generating units: Current Configuration
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OPP 515 South Area Operation
Figure 2
South Alberta Area Wind Aggregated generating facilities and Generating units: Castle Rock/Fidler Extension
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OPP 515 South Area Operation
Table 1
Remedial action schemes In Effect in the South Alberta area
South Area RAS
#
RAS Monitoring Point
Affected Generation
1
At Coleman 786L (T799S – BCTC Natal)
Summerview #2, Summerview #1, Blue Trail, Ardenville,
Kettles Hill, and Soderglen
2
At Goose Lake 103S 893L (T103S)
Summerview #2,
3
At Goose Lake T103S 616L Terminal
Ardenville, Blue Trail, Soderglen
4
At Peigan 59S 616L Terminal
Summerview #2, Kettles Hill, Summerview #1
5
At Peigan T59s transformer T1
Ardenville, Blue Trail, Summerview #2,
6
At Spring Coulee 225L West, (385S – 229S)
None. Trips 385S225W to remove the overload
7
At Magrath or Riverbend 863L or
Magrath Garden City
8
Loss of the Magrath 225S transformer T1
Taylor Chute, Taylor Hydro
Table 2
Remedial action schemes Remaining in Effect in South Alberta area after removal of 893L
South Area RAS
#
RAS Monitoring Point
Affected Generation
1
At Coleman 786L (T799S – BCTC Natal)
Castle Rock Ridge, Summerview #2, Summerview #1, Old
Man River Wind, Blue Trail, Ardenville, Kettles Hill, and
Soderglen
2
At Goose Lake T103S 616L Terminal
Ardenville, Blue Trail, Soderglen
3
At Peigan 59S 616L Terminal
Castle Rock Ridge, Summerview #2, Old Man River Wind,
Kettles Hill, Summerview #1
4
At Peigan T59s transformer T1
Ardenville, Blue Trail, Castle Rock Ridge, Summerview #2,
Old Man River Wind
5
At Spring Coulee 225L West, (385S – 229S)
None. Trip 385S225W to remove the overload
6
At Magrath or Riverbend 863L
Magrath Garden City
7
Loss of the Magrath 225S transformer T1
Taylor Chute, Taylor Hydro
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