Use-Limit Resource Guide Book
Standard
Version #6
Effective Date 4/5/2016
CAISO Public
[ISO Division]
Use-Limit Resource Guide Book Standard
ID No.:
Version No.:
Optional field – if dept has
established convention
Current version number,
aligned with revision
history
REVISION HISTORY
VERSION
NO.
1.0
2.0
3.0
DATE
12-12-2007
12-24-2007
10-12-2010
4.0
10-01-2011
5.0
3-9-16
6.0
4-5-16
Market Services / [Doc
Owner]
DESCRIPTION
Initial Draft Release
Version 2
Version 3
Version 4 – updating
Guidebook owner and content.
Updated Use-Limited
Resources template
information, registration,
document requirement,
submission, change of status
and contacts.
Clarify solar and wind ULPDT
submission requirement in
section 2.1.2.and added item c
to section 2.3.1 under #7.
LIMITATION.
CAISO Public
4-1-2016
[ISO Division]
Use-Limit Resource Guide Book Standard
ID No.:
Version No.:
Optional field – if dept has
established convention
Current version number,
aligned with revision
history
TABLE OF CONTENTS
1.0
PURPOSE .............................................................................................................. 4
2.0
USE-LIMITED RESOURCES ................................................................................. 4
2.1 Registration of Use-Limited Resources ........................................................................ 4
2.1.1 Hydro Generating Units, Participating Load, Pumping Load, PDR, and RDRR .......... 4
2.1.2 Other Resources ............................................................................................................. 4
2.2 Documentation Requirement by Resource Type ......................................................... 6
2.3 Use-Limited Plan Data Template .................................................................................... 7
2.3.1 Completing the ULPDT: ................................................................................................. 7
2.3.2 Resource with an Annual 12 Month Rolling Use Limitation......................................... 9
2.3.3 Resource with an Annual Calendar Year Use Limitation ............................................ 11
2.4 ULPDT Submission .......................................................................................................12
2.4.1 Steps for submitting ULPDT: ....................................................................................... 12
2.4.2 ULPDT Annual Update:................................................................................................ 12
2.4.3 ULPDT Monthly Update:.............................................................................................. 12
2.4.4 ULPDT Intra-Monthly Update: ..................................................................................... 12
3.0
CHANGE OF USE-LIMITED STATUS ................................................................. 12
4.0
CONTACTS ......................................................................................................... 13
Market Services / [Doc
Owner]
CAISO Public
Table of Contents
1.0 PURPOSE
This guide book, developed by CAISO, provides guidelines to Market Participants in requesting Use-Limited status for resources and
requesting updates, including use plans and information about the template Scheduling Coordinators must use for submitting Use-Limited
resource requests. In addition, this document contains reference information related to requirements of Use-Limited Resources.
2.0 USE-LIMITED RESOURCES
As per Section 40.6.4 of the CAISO Tariff, a Use-Limited Resource is defined as a resource that due to design considerations,
environmental restrictions on operations, cyclical requirements, such as the need to recharge or refill, or other non-economic reasons, is
unable to operate continuously on a daily basis, but is able to operate for a minimum set of consecutive Trading Hours each Trading Day.
Examples are hydro-electric resources and gas turbine resources with emissions limitations. Any resource which cannot generate for all
hours of the day due to emission limitations from local air quality board etc is a Use-Limited Resource.
2.1 Registration of Use-Limited Resources
2.1.1 Hydro Generating Units, Participating Load, Pumping Load, PDR, and RDRR
As per Section 40.6.4 of the CAISO Tariff, all Hydroelectric Generating Units, Participating Load, Pumping Load, PDR, RDRR are exempt
from the requirement to register as a Use-Limited Resource and will be automatically designated by the ISO as a Use-Limited Resource.
Although, Hydroelectric Generating Units will be designated as a Use-Limited Resource, but there is a documentation requirement as
illustrated on the table in section 2.1.2 (from BPM for Market Operations section 2.5.5.1).
2.1.2 Other Resources
Based on the table below from BPM for Market Operations section 2.5.5.1, if a resource is use-limited the scheduling
coordinator must register the resource as use-limited by submitting the Resource Data Template (RDT) through the Master File
UI. Within five (5) business days after the receipt of the application, the ISO will respond to the scheduling coordinator as to
whether or not the ISO agrees that the resource is eligible to be use-limited.
The use limit flag has to be set and approved by Model and Contract Implementation (MCI) before scheduling coordinators can
submit the Use-Limited Plan Data Template (ULPDT). The ULPDT is not required for solar and wind resources.
4
Figure 2-1: Table from BPM for Market Operations section 2.5.5.1
Resource-Type
Gas-Fired (Steam)
Gas-Fired (Combined Cycle)
Gas-Fired (GT with limited fuel
storage)
Gas-Fired (GT without limited
fuel storage)
Gas-Fired with environmental
restrictions that constraint its
operation
Hydro-Large Storage
Hydro-Small Storage/Small
Conduit
Use-Limited (Yes/No)
No
No
Yes
Supporting
Documentation
Requirement in
CIDI
No
No
Limitation
-Air Permit
Translation/Formu
la
- As Required
No
No
Limitation
-Air Permit
Translation/Formu
la
Yes
- As Required
Yes/No - although Hydro with large Limitation
amount of storage may have more - Storage
flexibility to generate on demand and Translation/Formu
thus may not be use-limited in a la
manner similar to a run-of-the river, - ERRA
downstream water flow and water- Summary
release
needs
and
other
environmental conditions may dictate
output so as to warrant Use-Limited
status
Yes
Limitation
- Storage
Translation/Formu
la
5
Hydro-Run of the River
Wind
QF Resource and Must Take
Yes
Yes
Yes
QF Resource and not Must
Take
Solar
Nuclear
Yes
Yes
Yes
- ERRA
Summary
Limitation
- Storage
Translation/Formu
la
- ERRA
Summary
No
No
Limitation
-Air Permit
Translation/Formu
la
- As Required
No
No
2.2 Documentation Requirement by Resource Type
Resource Type
Hydro – Annual & Monthly
Hydro – Intra Month
QF Resource (not Regulatory Must Take)
Gas-Fired (GT with limited fuel storage)
Gas-Fired with environmental restrictions that
constraint its operation
Use Plan Data
Limitation – ERRA Summary of model city
the limitations.
Translation/Formula – ERRA Summary of
model describing input values, constraints,
and outputs.
List of updates to input values used in initial
document describing the translation/formula.
Limitation – Air Permit
Translation/Formula – As Required.
Limitation – Air Permit
Translation/Formula – As Required.
Limitation – Air Permit
Translation/Formula – As Required.
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2.3 Use-Limited Plan Data Template
2.3.1 Completing the ULPDT:
Figure 2-2: Use Limit Plan Data Template
1. SC_ID
a. Enter the Scheduling Coordinator ID who is provisioned to the resource when the Use Limit Plan is to become effective.
2. RES_ID
a. Enter the Resource ID assigned by the CAISO to the resource.
3. USE_LIMIT_TYPE
a. Enter the nature of the use limitation.
b. Use Limit Type must be ‘START’, ‘RUNHOURS’, ‘ENERGY’, or ‘OTHER’
4. GRANULARITY
a. Enter the period of use limitation based on the Use Limit Type.
b. Granularity must be ‘DAILY’, ‘MONTHLY’, ‘ANNUALLY’, or ‘OTHER’
5. PLAN_START_DT_TIM
a. Enter the date that this use limitation becomes effective. Format type must be MM/DD/YYYY.
b. The effective date of the use plan data template has to be five (5) business days out from the day of the submission.
6. PLAN_END_DT_TM
a. Enter the effective end date that this use limitation expires. Format type must be MM/DD/YYYY.
b. End date will default with a timestamp of 23:59:59.
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7. LIMITATION
a. Enter the number of limitation for the GRANULARITY period, for example figure 2-3 shows RES A has 300 number of starts
annually.
b. Limitation must be > 0
c. If the number of limitation is a translation, provide a document/input describing the method of translating into starts, run-hours,
etc. The document/input must be attached to the CIDI ticket.
Figure 2-3: Sample of ULPDT
8. MIN_USE_LIMIT
a. Enter the minimum capacity level for which the limitation applies. This is the same as the PMin (MIN_GEN).
b. This field is Optional.
9. MAX_USE_LIMIT
a. Enter the maximum capacity level for this the limitation applies. This is the same as the PMax (MAX_GEN).
b. This field is Optional.
10. DOC_NAME
a. Enter the supporting documentation name, page number reflecting limitation cited, and CIDI ticket #.
b. The ULPDT must specify the CIDI ticket number in the documentation name column. See table in Section 2.2 for
documentation requirement by resource type.
c. If no supporting documentation is required, state “not required” in the ULPDT. See Figure 2-1, above for supporting
documentation requirements.
d. If supporting documentation has changed then scheduling coordinators are required to resubmit the ULPDT through Master
File.
Note: Delete Row 3 prior to uploading the template to the Master File UI.
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2.3.2 Resource with an Annual 12 Month Rolling Use Limitation
Resource with an annual 12 month rolling use limitation should represent their use limitation as Monthly limitations.
Figure 2-4: Sample of ULPDT for resource with a rolling 12 month use limitation with RA Capacity.
Examples:
1. Initial submission: RES_B has a total of 120 number of START limitation. Assuming that the participant expects a limitation of 10 starts
each month, and assuming that the initial submission is for effective date 5/1/16.
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Example of Participant Calculations:
RES_B Annual starts value =
120
Actual number of starts for the previous 11 months (period 6/1/2015 to 4/30/16) = 108
Number of remaining startups for May 2016=
12
Note: Market Participants are responsible for keeping track of the number of startups and remaining starts.
2. Update for initial go-live period: SCID ABCD submits an updated ULPDT for RES_B on 5/9/2016 for effective date 5/16/2016:
Figure 2-5: Updated ULPDT submission
Figure 2-6: Sample of Records in Master File
10
2.3.3 Resource with an Annual Calendar Year Use Limitation
Figure 2-7 and the example below shows resource with an annual calendar year use limitation.
1. Initial submission for RES_C
Figure 2-7:
2. Update submission during the year: SCID ABCD, submits an updated ULPDT for RES_C on 9/15/2017 for effective date
9/25/2017.
Note: A justification for the updated ULPDT to the annual Use Plan is needed to explain the change in values.
Figure 2-8: Sample of Records in Master File
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2.4 ULPDT Submission
2.4.1 Steps for submitting ULPDT:
1. The use limit flag has to be set and approved by MCI before the scheduling coordinators can submit the ULPDT through the Master
File UI.
2. All supporting documentation must be submitted through the customer inquiry dispute and information (CIDI) tool.
a. CIDI tool can be found on the market participant portal at:
https://portal.caiso.com/MPP_files/MPPApps.html
b. In the subject line of the CIDI ticket, specify if the documentation is for ULR renewal of the use limitation status or ULR
registration for a new resource.
2.4.2 ULPDT Annual Update:
As per Section 40.6.4.2 of the CAISO Tariff, the Scheduing Coordinator shall provide for the following Resource Adequacy Compliance
Year a proposed annual use plan for each Use-Limited Resource that is a Resource Adequacy. The proposed annual use plan delineates
the total MWhs of Generation, total run hours, expected daily supply capability (if greater than four hours) and the daily energy limit.
Scheduling coordinator is able to submit its final annual use plan by the last business day of October for the following trade year. And
Scheduling coordinator is able make monthly updates to the projections made in the annual use plan.
2.4.3 ULPDT Monthly Update:
Scheduling coordinator is able to make monthly updates to the projections made in the annual use plan. The monthly updates are
required to be submitted at least 5 business days prior to the start of the compliance month. All updates must be submitted through the
Master File UI, and supporting documentation for the ULPDT must be submitted through CIDI ticket. See section 2.3.1-2.3.2 on how to
complete the ULPDT and submitting supporting documentation through CIDI.
2.4.4 ULPDT Intra-Monthly Update:
Scheduling Coordinators for Hydroelectric Generating Units and Pumping Load will be able to update use plans intra-monthly as
necessary to reflect evolving hydrological and meteorological conditions.
3.0
CHANGE OF USE-LIMITED STATUS
SC can change the status of their resources from being Use-Limited to not being Use-Limited as per their discretion. SCs are
requested to provide an explanation of the reasons for the change of status. Once CAISO has been notified, the CAISO will make this
change in accordance with the Master File update process
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4.0
CONTACTS
For questions regarding subject matter covered in this standard, please contact RDT@CAISO.com
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