Proposed Revision Request Detail Help
PRR Life Cycle*********Closed
PRR Details
PRR #
1404
Title Market operations BPM edits related to energy storage and distributed energy resources phase 4 cleanup
Date Submitted 1/26/2022 10:34 AM
PRR Category A
Priority Normal
Owner Batakji, Jamal (CAISO)
Status Closed
Status End Date 4/12/2022 11:59 PM
Related BPM Market Operations
BPM Section 6.5, 7.1, 7.4, 7.8.2.5
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Existing Language
 
See attached
Proposed Language
 
See   attached
Reason For Revision
 
Clean-up edits related to ESDER4 initiative that was implemented few months ago. The scope of the edits are as follows: 1. Edits to remove multiple instances of the same information for ease of revision control. 2. Miscellaneous clean-up edits that were identified after the initial PRRs for ESDER4 were posted. 3. Additional information and examples of EOH SOC management.
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BPM PRR Submitter

Batakji, Jamal (CAISO)
Modified BPM language proposed by the PBM Chnage Management Coordinator

Edits to PRR1404 attached.
Remaining questions are also attached
Identification of the authorship of comments

Katie Wikler (CAISO) responses to PGE - See attached
Action

Approve the BPM PRR as submitted or modified and forward to CAISO senior management for consideration and possible approval, rejection or referral

See modifications in attached
Statement of apparent requirements of the BPM PRR

Priority and rank for any BPM PRR requiring a CAISO system change

Proposed effective date(s) of the BPM PRR

Other recommended actions

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Final Decision

Adopt recommendation as Modified
Stakeholder Comment

Additional examples were added for more clarity. 

Effective Date

Action

Adopt the recommendation as modified

Announcements
No Announcements has been posted for this PRR.
Impact Analysis
Impact Analysis not available.
Initial Comments
1. Since hybrid resources are not subject to mitigation, PG&E is confused as to the meaning of “resources comprised of multiple technologies that include Non-Generator Resources” which are subject to mitigation (Pages 2 and 11). If not hybrids, what are these resources?

2. What is the default DEB ranking since it is removed from the Market Operations BPM (Page 5)? (Note: Market Instruments Attachment D does not specify)

3. Could the CAISO please clarify the difference between an IFM commitment and a binding day-ahead commitment? (Page 10)

4. Footnote 6 on Page 14 is confusing; there is no section 2.8.5.2 in the Market Operations BPM

5. The term “daily SOC limits” (Pages 16, 17, and 20) should be changed to “upper and lower charge limits” to match the SIBR Business Rules terminology

6. The CAISO should update the reference on Page 17, which refers to the BPM for Market Instruments, Appendix Attachment A, since this attachment redirects to the SIBR Business Rules on the CAISO’s website.

7. PG&E asks whether footnote 8 on Page 17 should read the opposite: “the procurement of ancillary services will take precedence over satisfying the EOH SOC constraint

8. Aren’t the “critical hours” on Page 20 defined as those which generate a RUC infeasibility in the IFM? Has the CAISO changed the meaning of this term to be more general?

9. In Example 1 (Page 20), why would the CAISO prefer a lesser minimum EOH SOC as a binding constraint during critical hours? Here, PG&E would expect the constraint to be 30MWh, which was the biddable min EOH SOC.


2/15/2022 4:02 PM
Logged By - MichaelVolpePGE (Pacific Gas & Electric Company)
---------------------------------------------
1. Will respond ASAP

2. The default rankings are noted in Market Instruments Attachment B, table B.2.1 (see RDT Column Names COST_RANK_LMPM, NEGO_RANK_LMPM, and PRC_RANK_LMPM). The default rankings are also specified in Tariff section 39.7.1. If no rank order is specified, the following default rank order applies: variable cost, negotiated, LMP.

3. ‘Binding’ refers to whether the commitment is operationally binding.  For long start resources, IFM commitments are operationally binding.  For short start resources they are not – the real-time market can re-optimize those commitments.

4. Will respond ASAP.

5. Agree that we are using inconsistent terminology in this section.  Will change the term ‘daily SOC limit’ to ‘daily Lower and Upper Charge Limit bids’.

6. We should leave the reference alone.  If the attachment A redirect ever changes, we would have to change references to more than one document.

7. The footnote is correct.  If ancillary services have already been procured, then SOC will be maintained to respect those services.  However, if a participant has submitted an EOH SOC constraint, it may affect the procurement of further ancillary services.

8. See footnote on previous page.

9. Critical hours may be those in which CAISO needs to serve the most load, thus will rely on battery discharge.  If the higher biddable constraint of 30 MWh is allowed to prevail, the battery may not provide needed supply to the grid, and in some cases may even result in charging of the battery.
2/22/2022 9:47 AM
Responded By - Batakji, Jamal (CAISO)
Recommendation Comments
ESDER4_MO_BPM_edits_20220126_20220223.docx    
Attached are edits to the originally submitted MO BPM with edits to Items 4 and 5
3/22/2022 11:49 AM
Logged By - Martin, Michael (CAISO)

1. Since hybrid resources are not subject to mitigation, PG&E is confused as to the meaning of “resources comprised of multiple technologies that include Non-Generator Resources” which are subject to mitigation (Pages 2 and 11). If not hybrids, what are these resources?
The text originates from Tariff section 31.2 and describes how mitigation is applied for resources under the Generic NGR model. The mitigation framework for hybrid resources is applied separately.
2. What is the default DEB ranking since it is removed from the Market Operations BPM (Page 5)? (Note: Market Instruments Attachment D does not specify)
The default rankings are noted in Market Instruments Attachment B, table B.2.1 (see RDT Column Names COST_RANK_LMPM, NEGO_RANK_LMPM, and PRC_RANK_LMPM). The default rankings are also specified in Tariff section 39.7.1. If no rank order is specified, the following default rank order applies: variable cost, negotiated, LMP.
3. Could the CAISO please clarify the difference between an IFM commitment and a binding day-ahead commitment? (Page 10)
‘Binding’ refers to whether the commitment is operationally binding.  For long start resources, IFM commitments are operationally binding.  For short start resources they are not – the real-time market can re-optimize those commitments.
4. Footnote 6 on Page 14 is confusing; there is no section 2.8.5.2 in the Market Operations BPM
This should read 7.8.5.2, we will make this correction.
5. The term “daily SOC limits” (Pages 16, 17, and 20) should be changed to “upper and lower charge limits” to match the SIBR Business Rules terminology
We will revise the term “daily SOC limits” to “daily Lower and Upper Charge Limit bids.”
6. The CAISO should update the reference on Page 17, which refers to the BPM for Market Instruments, Appendix Attachment A, since this attachment redirects to the SIBR Business Rules on the CAISO’s website.
This reference will be left as-is due to revision control considerations between documents.
7. PG&E asks whether footnote 8 on Page 17 should read the opposite: “the procurement of ancillary services will take precedence over satisfying the EOH SOC constraint
The footnote is correct.  If ancillary services have already been procured, then SOC will be maintained to respect those services.  However, if a participant has submitted an EOH SOC constraint, it may affect the procurement of further ancillary services.
8. Aren’t the “critical hours” on Page 20 defined as those which generate a RUC infeasibility in the IFM? Has the CAISO changed the meaning of this term to be more general?
See footnote on previous page.
9. In Example 1 (Page 20), why would the CAISO prefer a lesser minimum EOH SOC as a binding constraint during critical hours? Here, PG&E would expect the constraint to be 30MWh, which was the biddable min EOH SOC.
Critical hours may be those in which CAISO needs to serve the most load, thus will rely on battery discharge.  If the higher biddable constraint of 30 MWh is allowed to prevail, the battery may not provide needed supply to the grid, and in some cases may even result in charging of the battery.






3/22/2022 11:46 AM
Logged By - Martin, Michael (CAISO)
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