2018 Base Case Compilation Schedule 2

Introduction

The Data Subcommittee compiles eleven steady state and dynamic base cases (base cases) to meet WECC’s requirements to compile interconnection-wide base cases. The 2018 Base Case Compilation Schedule provides base case descriptions and a schedule for base cases to be compiled during the 2018 calendar year.

Objectives

The objectives of the 2018 Base Case Compilation Schedule are:

I.  Provide a detailed schedule, to appropriate stakeholders, identifying necessary data submittals and data review milestones to compile eleven bases cases.

II.  Identify bases cases to be compiled. A typical annual base case compilation schedule includes the following base cases:

a.  Five operating cases

b.  Two scenario cases

c.  One 5-year summer planning case

d.  One 5-year winter planning case

e.  One 10-year summer planning case

f.  One 10-year winter planning case

Supporting Information

Timely submittal of steady state and dynamics data is necessary for the 2018 Base Case Compilation Schedule to be maintained. In the event of delayed steady state and dynamic data submittals, the Data Subcommittee will follow the Late Data Procedure provided in the WECC Data Preparation Manual.

Typical base cases are intended to model anticipated load levels, but in some instances may model slightly heavier or slightly lighter than anticipated load levels to achieve desired stressed transfer levels on designated paths. Typical base cases usually include operating cases, five-year cases, ten-year cases, and additional cases as requested by the RAC membership. Scenario base cases are intended to represent critical operating conditions such as severe weather events, equipment out of service (transmission lines, reactive devices, or static var compensators), unusual generation patterns due to forced outages, and insecure voltage conditions. Some cases may represent extreme load conditions (up to 105 percent of forecasted peak) in a particular sub-region. Data submitters should not be reluctant to model a condition due to lack of historical record of the scenario actually occurring.

The 2018 Base Case Compilation Schedule includes the following base cases:

·  Typical base cases

o  Operating base cases

§  2018-19 Heavy Winter

§  2018-19 Light Winter

§  2019 Heavy Spring

§  2019 Heavy Summer

§  2019 Light Summer

o  Five-year base cases

§  2024 Heavy Summer

§  2023-24 Heavy Winter

o  Ten-year base cases

§  2028-29 Heavy Winter

§  2029 Heavy Summer

·  Scenario base cases

o  2029 Heavy Spring with mid-day load and high renewable generation

o  2019 Light Spring with 50-60% of peak load and high renewable generation

Generation and load levels referred to in the base case description sheets refer to the season being studied. For example, if a case description sheet for a winter base case calls for high hydro in a specific area, this means high levels of hydro generation for a winter condition. In some areas, a high level of hydro generation in the winter may be less than median hydro generation levels in the spring or summer. Also, light loads may be increased in the importing areas or heavy loads may be decreased in exporting areas to represent the desired interchange schedules. Renewable generation, when specified, should be based on individual entities’ Renewable Portfolio Standard. Specific information on the desired load levels is contained in the base case description sheets and should be used as a guide in preparing cases. All loads are coincident unless indicated otherwise. Specified time supersedes specified percentage of load.

Interchange Schedules in the base case description sheets refer to the target flows that should be reached to represent anticipated flow levels and direction for the season being studied. Targets may be altered as anticipated operating conditions become more clearly known. Where no target flows are specified actual scheduled transfers should be based on each area’s load and generation (deficiency/surplus) balance and economical generation dispatch. The purpose of the case should be kept in mind and schedules should be coordinated between areas prior to data submittal.

Only corrections to the Master Dynamics File (MDF) or new data for the MDF need be submitted for each case build.

During the process of compiling each base case, WECC staff and the appropriate functional entities participating in base case compilation process should follow the data requirements and procedures outlined in the WECC Data Preparation Manual. Following the documented requirements and procedures will contribute to developing base cases with compatible steady state and dynamic data, help to ensure the Interconnection-wide Model is adequately modeled, and aid in continual improvement in the accuracy of the data submitted.

Western Electricity Coordinating Council

2018 Base Case Compilation Schedule

CASE[1] / DATE DATA
REQUEST
MAILED / DATE DATA DUE TO DATA SUBMITTER / DATE DATA
DUE TO
WECC STAFF / WECC STAFF SEND CASE FOR REVIEW / DATE COMMENTS
DUE TO
DATA SUBMITTER / DATE DATA SUBMITTER COMMENTS DUE TO
WECC STAFF / WECC STAFF
FINALIZE
DATE
2021 LSP1-S / 07/21/17 / 08/18/17 / 09/15/17 / 09/29/2017 / 10/13/2017 / 10/20/2017 / 11/03/2017
2027-28 HW1 / 08/04/17 / 09/01/17 / 09/29/17 / 10/27/17 / 11/10/17 / 11/17/17 / 12/01/17
2028 HS1
2028 LSP1-S3 / 09/08/17 / 10/6/17 / 11/3/17 / N/A / N/A / N/A / N/A
2019-20 HW1-S / 10/06/17 / 11/03/17 / 12/01/17 / 12/15/17 / 12/29/17 / 01/05/18 / 01/19/18
CASE / DATE DATA
REQUEST
MAILED / DATE DATA DUE TO DATA SUBMITTER[2] / DATE DATA
DUE TO
WECC STAFF / WECC STAFF SEND CASE FOR REVIEW / DATE COMMENTS
DUE TO
DATA SUBMITTER / DATE DATA SUBMITTER COMMENTS DUE TO
WECC STAFF / WECC STAFF
FINALIZE
DATE
2018-19 HW3-OP / 11/17/17 / 12/15/17 / 01/12/18 / 02/9/18 / 02/23/18 / 03/09/18 / 03/23/18
2018-19 LW1-OP
2019 HSP1-OP / 01/5/18 / 02/2/18 / 03/2/18 / 03/30/17 / 04/13/18 / 04/20/18 / 05/04/18
2023-24 HW2 / 02/16/18 / 03/16/18 / 04/13/18 / 05/11/18 / 05/18/18 / 06/01/18 / 06/15/18
2024 HS2
2019 HS3-OP / 04/06/18 / 05/04/18 / 06/01/18 / 06/29/18 / 07/13/18 / 07/27/18 / 08/10/18
2019 LS1-OP
2019 LSP1-S / 05/25/18 / 06/22/18 / 07/20/18 / 08/17/18 / 08/24/18 / 08/31/18 / 09/14/18
2028-29 HW1 / 07/06/18 / 08/03/18 / 08/31/18 / 09/28/2018 / 10/05/2018 / 10/19/2018 / 11/2/2018
2029 HS1
2029 HSP1-S / 10/05/18 / 11/02/18 / 11/30/18 / 12/28/18 / 1/04/19 / 1/11/19 / 02/25/19

5

2018-2019 HEAVY WINTER – 19HW3-OPCASE DESCRIPTION

I.  CASE DUE DATES: To Data Submitter: December 15, 2017
To WECC Staff: January 12, 2018

II.  PURPOSE: OPERATING CASE – TO REPRESENT ANTICIPATED OPERATING CONDITIONS WITH HEAVY FLOWS FROM NORTHWEST TO CALIFORNIA.

III.  ITEMS TO BE PREPARED: From Case 2017-18HW3 Operating Case
Stability Data Master Dynamics File
Significant Changes From Existing System

IV.  LOADS: Expected peak load for the months of December - February

V.  TIME: 1800 – 2000 hours MST

VI.  GENERATION HYDRO THERMAL RENEWABLE

Canada High/Median -- --
Northwest High/Median High --
Idaho/Montana Median High --
Colorado/Wyoming Low High --
Northern California Hydro Median -- --
Northern California Low High --
Southern California Low High --
Arizona/New Mexico/Southern Nevada Low High --

VII.  INTERCHANGE CONDITION TARGET % RATING

Canada to Northwest (Path 3) Moderate -1400[3] 46%
Northwest to California/Nevada
COI (Path 66) Moderate 2000 42%
PDCI (Path 65) Heavy 2400 75%
Midway – Los Banos S-N (Path 15) ------
Idaho to Northwest (Path 14) ------
Montana to Northwest (Path 8) Moderate 1400 64%
Utah/Colorado to Southwest ------
(Path 31, 35, 78 & Durango – Coyote 115 kV)

Southwest to Calif. (EOR Path 49/WOR Path 46) Moderate 4000/5000 43%/47%
Intermountain to Adelanto DC (Path 27) Heavy 1850 96%
San Diego to CFE (Path 45) ------
Midway to Vincent (Path 26) Heavy 2800 70%

2018-2019 LIGHT WINTER – 19LW1-OPCASE DESCRIPTION

I.  CASE DUE DATES: To Data Submitter: December 15, 2017
To WECC Staff: January 12, 2018

II.  PURPOSE: OPERATING CASE – TO REPRESENT ANTICIPATED OPERATING CONDITIONS DURING LIGHT LOAD PERIODS.

III.  ITEMS TO BE PREPARED: From Case 2017-18HW3 Operating Case
Stability Data Master Dynamics File
Significant Changes From Existing System

IV.  LOADS: Expected minimum load for the months of December - February

V.  TIME: Early morning (0300 to 0500 hours MST), winter conditions.

VI.  GENERATION HYDRO THERMAL RENEWABLE

Canada Median/Low -- --
Northwest Low Median/Low --
Idaho/Montana Median Median --
Colorado/Wyoming Low Median --
Northern California Hydro Median -- --
Northern California Low Median --
Southern California -- Median --
Arizona/New Mexico/Southern Nevada -- Median --

VII.  INTERCHANGE CONDITION TARGET % RATING

Canada to Northwest (Path 3) Moderate -1400[4] 46%
Northwest to California/Nevada
COI (Path 66) Low 0/-500 14%
PDCI (Path 65) Low 0/-500 15%
Midway – Los Banos S-N (Path 15) Heavy 3450 64%
Idaho to Northwest (Path 14) Moderate >1000 42%
Montana to Northwest (Path 8) Heavy 2000 91%
Utah/Colorado to Southwest ------
(Path 31, 35, 78 & Durango – Coyote 115 kV)

Southwest to Calif. (EOR Path 49/WOR Path 46) Moderate 5100/6900 54%/65%
Intermountain to Adelanto DC (Path 27) Heavy 1850 77%
San Diego to CFE (Path 45) ------
Midway to Vincent (Path 26) Moderate -500 17% (S-N)

2019 HEAVY SPRING – 19HSP1-OPCASE DESCRIPTION

I.  CASE DUE DATES: To Data Submitter: February 2, 2018
To WECC Staff: March 2, 2018

II.  PURPOSE: OPERATING CASE – TO REPRESENT ANTICIPATED OPERATING CONDITIONS WITH HIGH FLOWS FROM NORTHWEST TO CALIFORNIA.

III.  ITEMS TO BE PREPARED: From Case 18HSP2 Operating Case
Stability Data Master Dynamics File
Significant Changes From Existing System

IV.  LOADS: Expected peak load for the months of March - May

V.  TIME: 1600 to 2000 hours MDT.

VI.  GENERATION HYDRO THERMAL RENEWABLE

Canada Median -- --
Northwest High Low --
Idaho/Montana High Median --
Colorado/Wyoming Median Median --
Northern California Hydro Median -- --
Northern California High Low --
Southern California ------
Arizona/New Mexico/Southern Nevada Median Median --

VII.  INTERCHANGE CONDITION TARGET % RATING

Canada to Northwest (Path 3) Moderate -1400[5] 46%
Northwest to California/Nevada
COI (Path 66) Maximum 4800 100%
PDCI (Path 65) Moderate 2000 62%
Midway – Los Banos S-N (Path 15) ------
Idaho to Northwest (Path 14) Low -400 17%
Montana to Northwest (Path 8) Moderate 1500 68%
Utah/Colorado to Southwest ------
(Path 31, 35, 78 Durango – Coyote 115 kV)

Southwest to Calif. (EOR Path 49/WOR Path 46) Low 3600/4500 38%/43%
Intermountain to Adelanto DC (Path 27) Heavy 1850 77%
San Diego to CFE (Path 45) ------
Midway to Vincent (Path 26) Heavy 2800 93%

2023-2024 HEAVY WINTER – 24HW2CASE DESCRIPTION

I.  CASE DUE DATES: To Data Submitter: March 16, 2018
To WECC Staff: April 13, 2018

II.  PURPOSE: GENERAL 5-YEAR CASE - WITH TYPICAL FLOWS THROUGHOUT WECC.

III.  ITEMS TO BE PREPARED: From Case 2022-23 HW1
Stability Data Master Dynamics File
Significant Changes From Existing System

IV.  LOADS: Expected peak load for the months of December - February

V.  TIME: 1800 – 2000 hours MST

VI.  GENERATION HYDRO THERMAL RENEWABLE

Canada High -- --
Northwest High High --
Idaho/Montana Median High --
Colorado/Wyoming Low High --
Northern California Hydro Median -- --
Northern California Low Median --
Southern California Low Median --
Arizona/New Mexico/Southern Nevada Low Median --

VII.  INTERCHANGE CONDITION TARGET % RATING

Canada to Northwest (Path 3) Moderate -1400[6] 46%
Northwest to California/Nevada
COI (Path 66) ------
PDCI (Path 65) ------
Midway – Los Banos S-N (Path 15) ------
Idaho to Northwest (Path 14) ------
Montana to Northwest (Path 8) ------
Utah/Colorado to Southwest ------
(Path 31, 35, 78 Durango – Coyote 115 kV)

Southwest to Calif. (EOR Path 49/WOR Path 46) -- --/-- --/--
Intermountain to Adelanto DC (Path 27) ------
San Diego to CFE (Path 45) ------
Midway to Vincent (Path 26) ------

2024 HEAVY SUMMER– 24HS2CASE DESCRIPTION

I.  CASE DUE DATES: To Data Submitter: March 16, 2018
To WECC Staff: April 13, 2018

II.  PURPOSE: GENERAL 5-YEAR CASE – WITH TYPICAL FLOWS THROUGHOUT WECC.

III.  ITEMS TO BE PREPARED: From Case 2022-23 HW1
Stability Data Master Dynamics File
Significant Changes From Existing System

IV.  LOADS: Expected peak load for the months of June - August

V.  TIME: 1500 to 1700 hours MDT

VI.  GENERATION HYDRO THERMAL RENEWABLE

Canada High -- --
Northwest Median High --
Idaho/Montana Median High --
Colorado/Wyoming Low High --
Northern California Hydro High -- --
Northern California High High --
Southern California Low High --
Arizona/New Mexico/Southern Nevada Low High --

VII.  INTERCHANGE CONDITION TARGET % RATING

Canada to Northwest (Path 3) Moderate >2000 66%
Northwest to California/Nevada
COI (Path 66) ------
PDCI (Path 65) ------
Midway – Los Banos S-N (Path 15) ------
Idaho to Northwest (Path 14) ------
Montana to Northwest (Path 8) ------
Utah/Colorado to Southwest ------
(Path 31, 35, 78 Durango – Coyote 115 kV)

Southwest to Calif. (EOR Path 49/WOR Path 46) -- --/-- --/--
Intermountain to Adelanto DC (Path 27) ------
San Diego to CFE (Path 45) ------
Midway to Vincent (Path 26) ------

2019 HEAVY SUMMER– 19HS3-OPCASE DESCRIPTION

I.  CASE DUE DATES: To Data Submitter: May 4, 2018
To WECC Staff: June 1, 2018

II.  PURPOSE: OPERATING CASE – TO REPRESENT ANTICIPATED OPERATING CONDITIONS WITH HEAVY FLOWS TO CALIFORNIA FROM THE NORTHWEST AND MODERATE FLOWS ELSEWHERE.

III.  ITEMS TO BE PREPARED: From Case 18HS3-Operating Case
Stability Data Master Dynamics File
Significant Changes From Existing System

IV.  LOADS: Expected peak load for the months of June - August

V.  TIME: Peak time 1500 to 1700 hours MDT

VI.  GENERATION HYDRO THERMAL RENEWABLE

Canada High -- --
Northwest Median/High High --
Idaho/Montana Median High --
Colorado/Wyoming Low High --
Northern California Hydro High -- --
Northern California High High --
Southern California Low High --
Arizona/New Mexico/Southern Nevada Low High --

VII.  INTERCHANGE CONDITION TARGET % RATING

Canada to Northwest (Path 3) Heavy 2300 73%
Northwest to California/Nevada
COI (Path 66) Heavy 4800 100%
PDCI (Path 65) Moderate 2000 65%
Midway – Los Banos S-N (Path 15) ------
Idaho to Northwest (Path 14) Light -- --
Montana to Northwest (Path 8) Moderate 1200 55%
Utah/Colorado to Southwest ------
(Path 31, 35, 78 Durango – Coyote 115 kV)

Southwest to Calif. (EOR Path 49/WOR Path 46) Low/Moderate 3000/5800 32%/57%
Intermountain to Adelanto DC (Path 27) Moderate 1660 69%
San Diego to CFE (Path 45) ------
Midway to Vincent (Path 26) Heavy 4000 100%