[Federal Register Volume 88, Number 49 (Tuesday, March 14, 2023)]
[Notices]
[Pages 15710-15715]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-05152]


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DEPARTMENT OF ENERGY

Western Area Power Administration


Desert Southwest Region Ancillary Services--Rate Order No. WAPA-
208

AGENCY: Western Area Power Administration, DOE.

ACTION: Notice of rate order concerning formula rates for Energy 
Imbalance Market services.

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SUMMARY: New formula rates for Energy Imbalance Market (EIM) 
Administrative Service, Energy Imbalance (EI) Service, and Generator 
Imbalance (GI) Service for the Western Area Lower Colorado (WALC) 
Balancing Authority (BA) have been confirmed, approved, and placed into 
effect on an interim basis. The new formula rates are necessary for the

[[Page 15711]]

WALC BA's participation in the California Independent System Operator's 
(CAISO) EIM.

DATES: The provisional formula rates under Rate Schedules DSW-EIM1T, 
DSW-EIM4T, and DSW-EIM9T are effective on April 5, 2023, and will 
remain in effect through September 30, 2026, pending confirmation and 
approval by the Federal Energy Regulatory Commission (FERC) on a final 
basis or until superseded.

FOR FURTHER INFORMATION CONTACT: Jack D. Murray, Regional Manager, 
Desert Southwest Region, Western Area Power Administration, P.O. Box 
6457, Phoenix, AZ 85005-6457, or Tina Ramsey, Rates Manager, Desert 
Southwest Region, Western Area Power Administration, (602) 605-2565, or 
email: [email protected].

SUPPLEMENTARY INFORMATION: On October 25, 2022, as part of Rate Order 
WAPA-175, FERC approved and confirmed on a final basis the following 
rate schedules for ancillary services applicable to the WALC BA through 
September 30, 2026: Rate Schedules DSW-SD4 (Scheduling, System Control, 
and Dispatch), DSW-RS4 (Reactive Supply and Voltage Control), DSW-FR4 
(Regulation and Frequency Response), DSW-EI4 (Energy Imbalance), DSW-
SPR4 (Spinning Reserves), DSW-SUR4 (Supplemental Reserves), and DSW-GI2 
(Generator Imbalance).\1\
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    \1\ Order Confirming and Approving Rate Schedules on a Final 
Basis, Docket No. EF21-6-000 (Oct. 25, 2022).
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    On September 15, 2021, WAPA and CAISO executed an Implementation 
Agreement to facilitate the WALC BA's participation in CAISO's real-
time energy market effective April 5, 2023.\2\ WAPA's decision to 
participate in CAISO's EIM was the result of nearly two years of 
analysis and collaboration with customers and stakeholders on the best 
path forward to manage the real-time mismatches between supply and 
demand within the WALC BA. To accommodate the WALC BA's participation 
in EIM and maintain revenue neutrality, new formula rates are required 
to pass through the financial settlements, administrative costs, and 
transaction fees incurred by the WALC BA.
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    \2\ FERC accepted the Implementation Agreement effective 
November 28, 2021, pursuant to a November 17, 2021, letter order in 
Docket No. ER21-2950. CAISO and WAPA subsequently executed, and 
CAISO filed with FERC, several participation agreements governing 
the WALC BA's participation in EIM. FERC accepted the participation 
agreements effective November 2, 2022, pursuant to an October 21, 
2022 letter order in Docket No. ER22-2786.
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    On January 9, 2023, WAPA's Desert Southwest Region (DSW) published 
a Federal Register notice (88 FR 1220) that proposed three new formula 
rates for EIM: EIM Administrative Service, EIM EI Service, and EIM GI 
Service and initiated a 30-day public consultation and comment period.

Legal Authority

    By Delegation Order No. S1--DEL-RATES-2016, effective November 19, 
2016, the Secretary of Energy delegated: (1) the authority to develop 
power and transmission rates to the WAPA Administrator; (2) the 
authority to confirm, approve, and place such rates into effect on an 
interim basis to the Deputy Secretary of Energy; and (3) the authority 
to confirm, approve, and place into effect on a final basis, or to 
remand or disapprove such rates, to FERC. By Delegation Order No. S1-
DEL-S3-2022-2, effective June 13, 2022, the Secretary of Energy also 
delegated the authority to confirm, approve, and place such rates into 
effect on an interim basis to the Under Secretary for Infrastructure. 
By Redelegation Order No. S3-DEL-WAPA1-2022, effective June 13, 2022, 
the Under Secretary for Infrastructure further redelegated the 
authority to confirm, approve, and place such rates into effect on an 
interim basis to WAPA's Administrator. This rate action is issued under 
Redelegation Order No. S3-DEL-WAPA1-2022 and Department of Energy 
procedures for public participation in rate adjustments set forth at 10 
CFR part 903.\3\
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    \3\ 50 FR 37835 (Sept. 18, 1985) and 84 FR 5347 (Feb. 21, 2019).
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    Following a review of its proposal, DSW's formula rates for EIM 
Administrative Service, EI Service, and GI Service are hereby 
confirmed, approved, and placed into effect on an interim basis. WAPA 
will submit Rate Order No. WAPA-208 to FERC for confirmation and 
approval on a final basis.

Department of Energy

Administrator, Western Area Power Administration

    In the matter of: Western Area Power Administration, Desert 
Southwest Region, Ancillary Services, New Formula Rates,

Rate Order No. WAPA-208

Order Confirming, Approving, and Placing Formula Rates for Energy 
Imbalance Market Services Into Effect on an Interim Basis

    The formula rates in Rate Order No. WAPA-208 are established 
following section 302 of the Department of Energy (DOE) Organization 
Act (42 U.S.C. 7152).\4\
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    \4\ This Act transferred to, and vested in, the Secretary of 
Energy the power marketing functions of the Secretary of the 
Department of the Interior and the Bureau of Reclamation 
(Reclamation) under the Reclamation Act of 1902 (ch. 1093, 32 Stat. 
388), as amended and supplemented by subsequent laws, particularly 
section 9(c) of the Reclamation Project Act of 1939 (43 U.S.C. 
485h(c)) and other acts that specifically apply to the projects 
involved.
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    By Delegation Order No. S1-DEL-RATES-2016, effective November 19, 
2016, the Secretary of Energy delegated: (1) the authority to develop 
power and transmission rates to the Western Area Power Administration 
(WAPA) Administrator; (2) the authority to confirm, approve, and place 
such rates into effect on an interim basis to the Deputy Secretary of 
Energy; and (3) the authority to confirm, approve, and place into 
effect on a final basis, or to remand or disapprove such rates, to the 
Federal Energy Regulatory Commission (FERC). By Delegation Order No. 
S1-DEL-S3-2022-2, effective June 13, 2022, the Secretary of Energy also 
delegated the authority to confirm, approve, and place such rates into 
effect on an interim basis to the Under Secretary for Infrastructure. 
By Redelegation Order No. S3-DEL-WAPA1-2022, effective June 13, 2022, 
the Under Secretary for Infrastructure further redelegated the 
authority to confirm, approve, and place such rates into effect on an 
interim basis to WAPA's Administrator. This rate action is issued under 
Redelegation Order No. S3-DEL-WAPA1-2022 and DOE procedures for public 
participation in rate adjustments set forth at 10 CFR part 903.\5\
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    \5\ 50 FR 37835 (Sept. 18, 1985) and 84 FR 5347 (Feb. 21, 2019).
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Acronyms, Terms, and Definitions

    As used in this Rate Order, the following acronyms, terms, and 
definitions apply:
    BA: Balancing Authority. As defined in WAPA's Tariff, the 
responsible entity that integrates resource plans ahead of time, 
maintains load-interchange-generation balance within a BAA, and 
supports interconnection frequency in real time.
    BAA: Balancing Authority Area. As defined in WAPA's Tariff, the 
term Balancing Authority Area shall have the same meaning as ``Control 
Area.''
    CAISO: California Independent System Operator Corporation. As 
defined in WAPA's Tariff, a state-chartered, California non-profit 
public benefit corporation that operates the transmission facilities of 
all CAISO participating transmission owners and dispatches certain 
generating units and

[[Page 15712]]

loads. The CAISO is the market operator for the EIM.
    NEPA: National Environmental Policy Act of 1969, as amended.
    Tariff: Open Access Transmission Tariff, including all schedules or 
attachments thereto, as amended from time to time and approved by FERC.
    OASIS: Open Access Same-Time Information System. As defined in 
WAPA's Tariff, the information system and standards of conduct 
contained in Part 37 of FERC's regulations and all additional 
requirements implemented by subsequent FERC orders dealing with OASIS.
    Provisional Formula Rates: Formula rates that are confirmed, 
approved, and placed into effect on an interim basis by the Secretary 
or his/her designee.

Effective Date

    The provisional formula rates under Rate Schedules DSW-EIM1T, DSW-
EIM4T, and DSW-EIM9T will take effect on April 5, 2023, and remain in 
effect through September 30, 2026, pending approval by FERC on a final 
basis or until superseded.

Public Notice and Comment

    WAPA's Desert Southwest Region (DSW) followed the Procedures for 
Public Participation in Power and Transmission Rate Adjustments and 
Extensions, 10 CFR part 903, in developing these formula rates. DSW 
took the following steps to involve interested parties in the rate 
process:
    1. On January 9, 2023, a Federal Register notice (88 FR 1220) 
announced the proposed formula rates and initiated a 30-day public 
consultation and comment period.
    2. On January 10, 2023, DSW notified customers and interested 
parties of the proposed formula rates and provided a copy of the 
Federal Register notice by email.
    3. DSW established a website to post information about the rate 
adjustment process. The website is located at www.wapa.gov/regions/DSW/Pages/DSW-EIM.aspx.
    4. During the 30-day consultation and comment period, which ended 
on February 8, 2023, DSW received no comments.

Ancillary Services Rate Discussion

    In accordance with WAPA's Tariff and to maintain the reliability of 
transmission service, DSW currently provides the following ancillary 
services: (1) Scheduling, System Control and Dispatch (Rate Schedule 
DSW-SD4); (2) Reactive Supply and Voltage Control (Rate Schedule DSW-
RS4); (3) Regulation and Frequency Response (Rate Schedule DSW-FR4); 
(4) Energy Imbalance (Rate Schedule DSW-EI4); (5) Spinning Reserve 
(Rate Schedule DSW-SPR4); (6) Supplemental Reserves (Rate Schedule DSW-
SUR4); and (7) Generator Imbalance (Rate Schedule DSW-GI2). The formula 
rates for these services are designed to recover the costs incurred for 
providing each of the services.
    To accommodate the WALC BA's participation in the CAISO EIM, DSW 
has added the following ancillary services: (1) EIM Administrative 
Service (provisional Rate Schedule DSW-EIM1T), (2) EIM EI Service 
(provisional Rate Schedule DSW-EIM4T), and (3) EIM GI Service 
(provisional Rate Schedule DSW-EIM9T). The formula rates for these 
services are designed to pass through the costs resulting from the WALC 
BA's participation in the CAISO EIM.

EIM Administrative Service

    The CAISO assesses administrative service charges and transaction 
fees to recover the costs associated with operating the EIM and 
providing services to participants. Rate Schedule DSW-EIM1T facilitates 
the pass through of CAISO EIM administrative service charges and 
transaction fees to DSW transmission customers and ensures the WALC BA 
remains revenue neutral. This rate schedule aligns with WAPA's Tariff 
and applies when the WALC BA participates in the CAISO EIM and when the 
EIM has not been suspended. The services provided under Rate Schedule 
DSW-SD4 continue to apply and the costs are included in the applicable 
transmission service rates. For clarity, when the WALC BA is 
participating in CAISO EIM, both Rate Schedules DSW-SD4 and DSW-EIM1T 
will apply.
    Transmission customers will be billed for their share of EIM 
Administrative Service charges allocated to the WALC BA for its 
participation in the CAISO EIM in accordance with DSW's EIM business 
practice posted on its OASIS at www.oasis.oati.com/walc/index.html. 
Revisions to the CAISO's Tariff may require changes to DSW's EIM 
business practice, which would be processed consistent with section 4.3 
of WAPA's Tariff.

EIM Energy Imbalance Service

    EI service is provided when a difference occurs between the 
scheduled and actual delivery of energy to a load within the WALC BAA. 
DSW's existing rate schedule for EI Service, DSW-EI4, does not address 
EIM participation or settlements.
    Rate Schedule DSW-EIM4T facilitates the pass through of any 
financial settlements for EI Service from the CAISO EIM to DSW 
transmission customers and ensures the WALC BA remains revenue neutral. 
This rate schedule aligns with WAPA's Tariff and applies to EI Service 
when the WALC BA participates in the CAISO EIM and when the EIM has not 
been suspended. Rate Schedule DSW-EI4 applies when the WALC BA is not 
participating in EIM or when the EIM has been suspended.
    Transmission customers will be billed for their share of EIM EI 
Service charges incurred by the WALC BA for its participation in the 
CAISO EIM in accordance with the settlement methods in DSW's EIM 
business practice posted on its OASIS at www.oasis.oati.com/walc/index.html. Revisions to the CAISO's Tariff may require changes to 
DSW's EIM business practice, which would be processed consistent with 
section 4.3 of WAPA's Tariff.

EIM Generator Imbalance Service

    GI service is provided when a difference occurs between the output 
of a generator located in the WALC BAA, and the delivery schedule from 
that generator to (1) another BAA or (2) a load within the WALC BAA. 
The EIM requires all participating resources to settle directly with 
the CAISO. Non-participating resources need to settle with the WALC BA, 
the EIM entity. DSW's existing rate schedule for GI Service, DSW-GI2, 
does not address EIM participation or make a distinction between 
participating and non-participating resources.
    Rate Schedule DSW-EIM9T facilitates the pass through of any 
financial settlements for GI service from the CAISO EIM to DSW 
transmission customers and ensures the WALC BA remains revenue neutral. 
This rate schedule aligns with WAPA's Tariff and applies to GI service 
when the WALC BA participates in the CAISO EIM and when the EIM has not 
been suspended. Rate Schedule DSW-GI2 applies when the WALC BA is not 
participating in EIM or when the EIM has been suspended.
    Transmission customers will be billed for their share of EIM GI 
Service charges incurred by the WALC BA for its participation in the 
CAISO EIM in accordance with the settlement methods in DSW's EIM 
business practice posted on its OASIS at www.oasis.oati.com/walc/index.html. Revisions to the CAISO's Tariff may require changes to 
DSW's EIM business practice, which would be processed consistent with 
section 4.3 of WAPA's Tariff.

[[Page 15713]]

Comments

    DSW received no comments during the public consultation and comment 
period.

Certification of Rates

    I have certified that the provisional formula rates under Rate 
Schedules DSW-EIM1T, DSW-EIM4T, and DSW-EIM9T are the lowest possible 
rates, consistent with sound business principles. The provisional 
formula rates were developed following administrative policies and 
applicable laws.

Availability of Information

    Information used by DSW to develop the provisional formula rates is 
available for inspection and copying at the Desert Southwest Regional 
Office, 615 South 43rd Avenue, Phoenix, Arizona. Many of these 
documents are also available on WAPA's website at www.wapa.gov/regions/DSW/Pages/DSW-EIM.aspx.

Ratemaking Procedure Requirements

Environmental Compliance

    WAPA determined that this action fits within the following 
categorical exclusion listed in appendix B to subpart D of 10 CFR 
1021.410: B4.3 (Electric power marketing rate changes). Categorically 
excluded projects and activities do not require preparation of either 
an environmental impact statement or an environmental assessment.\6\ A 
copy of the categorical exclusion determination is available on WAPA's 
website at www.wapa.gov/regions/DSW/Environment/Pages/environment.aspx.
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    \6\ The determination was done in compliance with NEPA (42 
U.S.C. 4321-4347); the Council on Environmental Quality Regulations 
for implementing NEPA (40 CFR parts 1500-1508); and DOE NEPA 
Implementing Procedures and Guidelines (10 CFR part 1021).
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Determination Under Executive Order 12866

    WAPA has an exemption from centralized regulatory review under 
Executive Order 12866; accordingly, no clearance of this notice by the 
Office of Management and Budget is required.

Submission to the Federal Energy Regulatory Commission

    The provisional formula rates herein confirmed, approved, and 
placed into effect on an interim basis, together with supporting 
documents, will be submitted to FERC for confirmation and final 
approval.

Order

    In view of the above, and under the authority delegated to me, I 
hereby confirm, approve, and place into effect, on an interim basis, 
Rate Order No. WAPA-208. The formula rates will remain in effect on an 
interim basis until: (1) FERC confirms and approves them on a final 
basis; (2) subsequent formula rates are confirmed and approved; or (3) 
such formula rates are superseded.

Signing Authority

    This document of the Department of Energy was signed on March 1, 
2023, by Tracey A. LeBeau, Administrator, Western Area Power 
Administration, pursuant to delegated authority from the Secretary of 
Energy. That document, with the original signature and date, is 
maintained by DOE. For administrative purposes only, and in compliance 
with Office of the Federal Register requirements, the undersigned DOE 
Federal Register Liaison Officer has been authorized to sign and submit 
the document in electronic format for publication, as an official 
document of the Department of Energy. This administrative process in no 
way alters the legal effect of this document upon publication in the 
Federal Register.

    Signed in Washington, DC, on March 9, 2023.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.

Rate Schedule DSW-EIM1T

Schedule 1T to OATT

United States Department of Energy

Western Area Power Administration

Desert Southwest Region

Western Area Lower Colorado Balancing Authority

Energy Imbalance Market--Administrative Service

(Approved Under Rate Order No. WAPA-208)

Effective

    Beginning on April 5, 2023, and extending through September 30, 
2026, or until superseded by another rate schedule, whichever occurs 
earlier.

Applicable

    This rate schedule applies to Administrative Service when the 
Western Area Lower Colorado (WALC) Balancing Authority (BA) 
participates in the California Independent System Operator's (CAISO) 
Energy Imbalance Market (EIM) and when the EIM has not been suspended. 
Rate Schedule DSW-SD4 for Scheduling, System Control and Dispatch 
Service, or its superseding rate schedule will continue to apply. Both 
DSW-EIM1T and DSW-SD4 shall apply when the WALC BA participates in the 
EIM.
    The CAISO assesses charges and fees to cover the costs associated 
with operating the EIM and providing various services to participants. 
The charges and fees associated with the WALC BA's participation in the 
EIM will be passed through to ensure the WALC BA remains revenue 
neutral.

Formula Rate

    Charges for Administrative Service shall reflect the pass through 
of applicable costs associated with the WALC BA's participation in the 
EIM that are assessed by the CAISO to the WALC BA. Costs shall be 
identified by a CAISO charge code and passed through to transmission 
customers using the settlement methods detailed in Desert Southwest 
Region's (DSW) EIM business practice posted on its Open Access Same-
time Information System (OASIS) at www.oasis.oati.com/walc/index.html. 
Revisions to the CAISO's Tariff may require changes to DSW's EIM 
business practice, which would be processed consistent with section 4.3 
of WAPA's Tariff.

Charge Components

    Administrative Service charges typically include one or more of the 
following items:

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                      Component                                               Description
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EIM Transaction.....................................  CAISO charge assessed to entities for EIM participation.
Scheduling Coordinator..............................  CAISO charge assessed to Scheduling Coordinators that have
                                                       any settlement activity during the relevant trading
                                                       month.

[[Page 15714]]

 
Forecasting Service.................................  CAISO fee to forecast the output of Variable Energy
                                                       Resources that are external to the CAISO BA Area.
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Rate Schedule DSW-EIM4T

Schedule 4T to OATT

United States Department of Energy

Western Area Power Administration

Desert Southwest Region

Western Area Lower Colorado Balancing Authority

Energy Imbalance Market--Energy Imbalance Service

(Approved Under Rate Order No. WAPA-208)

Effective

    Beginning on April 5, 2023, and extending through September 30, 
2026, or until superseded by another rate schedule, whichever occurs 
earlier.

Applicable

    This rate schedule applies to Energy Imbalance (EI) Service when 
the Western Area Lower Colorado (WALC) Balancing Authority (BA) 
participates in the California Independent System Operator's (CAISO) 
Energy Imbalance Market (EIM) and when the EIM has not been suspended. 
Rate Schedule DSW-EI4 or its superseding rate schedule would apply when 
the WALC BA is not participating or when the EIM has been suspended.
    The CAISO EIM provides energy to the WALC BA when there is a 
difference between the scheduled and actual delivery of energy to a 
load within the WALC BA Area. These differences (energy imbalances) 
result in financial settlements between the CAISO and the WALC BA. Any 
financial settlements for energy imbalances associated with the WALC 
BA's participation in the EIM will be passed through to ensure the WALC 
BA remains revenue neutral.

Formula Rate

    Charges for EI Service shall reflect the pass through of all 
applicable costs associated with the WALC BA's participation in the EIM 
that are assessed by the CAISO to the WALC BA. Costs shall be 
identified by a CAISO charge code and passed through to transmission 
customers using the settlement methods detailed in Desert Southwest 
Region's (DSW) EIM business practice posted on its Open Access Same-
time Information System (OASIS) at www.oasis.oati.com/walc/index.html. 
Revisions to the CAISO's Tariff may require changes to DSW's EIM 
business practice, which would be processed consistent with section 4.3 
of WAPA's Tariff.

Charge Components

    Charges for EI Service will typically include one or more of the 
following items:

----------------------------------------------------------------------------------------------------------------
                     Components                                               Description
----------------------------------------------------------------------------------------------------------------
Instructed Imbalance Energy.........................  Operational adjustment of transmission customer's affected
                                                       interchange or intrachange, including certain changes
                                                       made to an E-Tag.
Uninstructed Imbalance Energy.......................  Differences between a transmission customer's metered load
                                                       and base schedule derived from interchange and
                                                       intrachange forecast data (E-Tags).
Unaccounted for Energy..............................  Differences between WALC BA generation (generators, non-
                                                       generator resources, and imports) and demand (from loads
                                                       and exports) adjusted for transmission losses.
Under/Over-Scheduling Load..........................  The under-scheduling and over-scheduling of transmission
                                                       that contributes to energy imbalances.
Uplifts or Offsets..................................  Imbalance energy for each settlement interval for each
                                                       resource within the EIM area and all system resources
                                                       dispatched in real time.
Bid Cost Recovery...................................  Bid costs for eligible resources (real-time energy) that
                                                       were scheduled or dispatched by the CAISO for the EIM.
Flexible Ramping....................................  Sufficient ramping capability to meet the forecasted net
                                                       load and cover upward and downward forecast error
                                                       uncertainty.
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Rate Schedule DSW-EIM9T

Schedule 9T to OATT

United States Department of Energy

Western Area Power Administration

Desert Southwest Region

Western Area Lower Colorado Balancing Authority

Energy Imbalance Market--Generator Imbalance Service

(Approved Under Rate Order No. WAPA-208)

Effective

    Beginning on April 5, 2023, and extending through September 30, 
2026, or until superseded by another rate schedule, whichever occurs 
earlier.

Applicable

    This rate schedule applies to Generator Imbalance (GI) Service when 
the Western Area Lower Colorado (WALC) Balancing Authority (BA) 
participates in the California Independent System Operator's (CAISO) 
Energy Imbalance Market (EIM) and when the EIM has not been suspended. 
Rate Schedule DSW-GI4 or its superseding rate schedule would apply when 
the WALC BA is not participating or when the EIM has been suspended.
    The CAISO EIM provides energy to the WALC BA when there is a 
difference between the scheduled and actual delivery of energy from a 
non-participating resource within the WALC BA Area. These differences 
(generator imbalances) result in financial settlements between the 
CAISO and the WALC BA. Any financial settlements for generator 
imbalances associated with the WALC BA's participation in the EIM will 
be passed through to ensure the WALC BA remains revenue neutral.

Formula Rate

    Charges for GI Service shall reflect the pass through of all 
applicable costs associated with the WALC BA's participation in the EIM 
that are assessed by the CAISO to the WALC BA. Costs shall be 
identified by a CAISO charge code and passed through to transmission 
customers using the settlement methods detailed in Desert Southwest 
Region's (DSW) EIM business practice posted on its Open Access Same-
time Information System (OASIS) at www.oasis.oati.com/walc/index.html. 
Revisions to the CAISO's Tariff may require changes to DSW's EIM 
business

[[Page 15715]]

practice, which would be processed consistent with section 4.3 of 
WAPA's Tariff.

Charge Components

    Charges for GI Service will typically include one or more of the 
following items:

----------------------------------------------------------------------------------------------------------------
                      Component                                               Description
----------------------------------------------------------------------------------------------------------------
Instructed Imbalance Energy.........................  Resource imbalances created by a manual dispatch, EIM
                                                       available balancing capacity dispatch, or adjustments to
                                                       resource forecasts pursuant to provisions of the CAISO's
                                                       Tariff.
Uninstructed Imbalance Energy.......................  Differences between a customer's metered generation and
                                                       base schedule derived from the resource forecast data
                                                       submitted through the CAISO's Base Schedule Aggregation
                                                       Portal.
Unaccounted for Energy..............................  Differences between WALC BA generation (generators, non-
                                                       generator resources, and imports) and demand (loads and
                                                       exports) adjusted for losses.
Under/Over-Scheduling...............................  The under-scheduling and over-scheduling of resources that
                                                       contributes to generator imbalances.
Uplifts or Offsets..................................  Imbalance energy for each settlement interval for each
                                                       resource within the EIM area and all system resources
                                                       dispatched in real time.
Bid Cost Recovery...................................  Bid costs for eligible resources (real-time energy) that
                                                       were scheduled or dispatched by the CAISO for the EIM.
Flexible Ramping....................................  Sufficient ramping capability to meet the forecasted net
                                                       load and cover upward and downward forecast error
                                                       uncertainty.
----------------------------------------------------------------------------------------------------------------

[FR Doc. 2023-05152 Filed 3-13-23; 8:45 am]
BILLING CODE 6450-01-P