2019 Base Case Compilation Schedule System Data Work … Base Case Compilation Schedule.pdfThe objectives of the 2019 Base Case Compilation Schedule are: I. Provide a detailed schedule,

2019 Base Case Compilation Schedule System Data Work Group (SDWG)

August 29, 2018

WESTERN ELECTRICITY COORDINATING COUNCIL 155 North 400 West, Suite 200

Salt Lake City, Utah 84103-1114

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 2019 Base Case Compilation

Schedule provides base case descriptions and a schedule for base cases to be compiled during the 2019

calendar year.

Objectives

The objectives of the 2019 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 specialized 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 2019 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. Specialized 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 sub-region. Data submitters should not be reluctant to

2019 Base Case Compilation Schedule 2

W E S T E R N E L E C T R I C I T Y C O O R D I N A T I N G C O U N C I L

model a condition due to lack of historical record of the specialized case actually occurring. The 2019

Base Case Compilation Schedule uses one of the specialized case slots for the NERC required Light

Spring Operations case. Since a Light Spring Operations case is now a NERC requirement, it is likely

that the DS will approve the Light Spring Operations case to replace the Heavy Spring Operations case

in the Base Case Compilation Schedule moving forward. If this occurs, when less than two specialized

cases are DS approved for a given schedule, a Heavy Spring case will be automatically added to a

Specialized slot.

The 2019 Base Case Compilation Schedule includes the following base cases:

• Typical base cases

o Operating base cases

▪ 2019-20 Heavy Winter

▪ 2019-20 Light Winter

▪ 2020 Heavy Spring

▪ 2020 Heavy Summer

▪ 2020 Light Summer

o Five-year base cases



o Ten-year base cases



• Specialized base case

o 2020 Light Spring-NERC required Light Spring Operating case

o 2030 Light Spring with mid-day 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.



Table 1. 2019 Base Case Compilation Schedule

CASE1

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

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 09/28/18 10/05/18 10/19/18 11/02/18

2029 HS1

2029 HSP1-S 10/05/18 11/02/18 11/30/18 12/28/18 01/04/19 01/11/19 01/25/19

CASE

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

2019-20 HW3-OP 11/16/18 12/14/18 01/11/19 02/08/19 02/22/19 03/08/19 03/22/19

2019-20 LW1-OP

2020 HSP1-OP 12/21/18 01/25/19 02/22/19 03/29/19 04/12/19 04/26/19 05/10/19

2020 LSP1-S

2024-25 HW2 02/08/19 03/15/19 04/12/19 05/17/19 05/31/19 06/14/19 06/28/19

2025 HS2

1 2018 Case Schedule

2 Data provided to the Data Submitter is expected to include topology corrections common to the set of cases being developed, project files for the out-year case (if applicable), and a load, generation and voltage profile for each case.



2020 HS3-OP 03/29/19 05/03/19 05/31/19 07/05/19 07/19/19 08/02/19 08/23/19

2020 LS1-OP

2029-30 HW1

05/17/19 06/21/19 07/19/19 08/30/19 09/13/19 09/27/19 10/11/19

2030 HS1

2030 LSP1-S 07/05/19 08/09/19 09/06/19 10/04/19 10/11/19 10/18/19 11/01/19



2019-20 HEAVY WINTER – 20HW3-OP CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: December 14, 2018 To WECC Staff: January 11, 2019

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

III. ITEMS TO BE PREPARED: From Case 2018-19 HW3 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 -- --

Norther California Low High --

Southern California Low High --

Arizona/New Mexico/Southern Nevada Low High --

VII. INTERCHANGE CONDITION TARGET % RATING

Northwest to British Columbia (Path 3) Moderate 15001 50%

Northwest to California/Nevada

COI (Path 66) Moderate 2000 42%

PDCI (Path 65) Moderate 2400 55%

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) -- -- --

Southwest to Calif. (EOR Path 49/WOR Path 46) Moderate 4000/5000 43%/47%

Intermountain to Adelanto DC (Path 27) Heavy 2100 88%

San Diego to CFE (Path 45) -- 60 15%

Northern to Southern California (Path 26) Heavy 2800 70%

1Minimum flows are required to represent the Canadian Entitlement.



2019-20 LIGHT WINTER – 20LW1-OP CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: December 14, 2018 To WECC Staff: January 11, 2019

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

III. ITEMS TO BE PREPARED: From Case 2018-19 HW3 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.


Canada Median/Low -- --

Northwest Low Median/Low --

Idaho/Montana Median Median --

Colorado/Wyoming Low Median --


Norther California Low Median --

Southern California -- Median --

Arizona/New Mexico/Southern Nevada -- Median --




COI (Path 66) Low 0/-500 14%

PDCI (Path 65) Low 0/-500 15%

Midway – Los Banos S-N (Path 15) Moderate 3450 64%

Idaho to Northwest (Path 14) Moderate >1000 42%

Montana to Northwest (Path 8) Heavy 1600 73%


Southwest to Calif. (EOR Path 49/WOR Path 46) Moderate 5100/6900 54%/65%

Intermountain to Adelanto DC (Path 27) Moderate 1600 67%

San Diego to CFE (Path 45) Low 60 15%

Northern to Southern California (Path 26) Low -1000 33% (S-N)




2020 HEAVY SPRING – 20HSP1-OP CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: January 25, 2019 To WECC Staff: February 22, 2019

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

III. ITEMS TO BE PREPARED: From Case 2019 HSP1 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.


Canada Median -- --

Northwest High Low --

Idaho/Montana High Median --

Colorado/Wyoming Median Median --


Norther California High Low --

Southern California -- -- --

Arizona/New Mexico/Southern Nevada Median Median --




COI (Path 66) Maximum 4800 100%



Idaho to Northwest (Path 14) Low -400 33%



Southwest to Calif. (EOR Path 49/WOR Path 46) Low 3600/4500 38%/43%



Northern to Southern California (Path 26) Heavy 2800 93%




2020 LIGHT SPRING – 20LSP1-S CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: January 25, 2019 To WECC Staff: February 22, 2019

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

III. ITEMS TO BE PREPARED: From Case 2019 HSP1 Operating Case Stability Data Master Dynamics File Significant Changes From Existing System

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

V. TIME: 0300 to 0500 hours MDT


Canada -- -- --

Northwest -- -- --

Idaho/Montana -- -- --

Colorado/Wyoming -- -- --

Northern California Hydro -- -- --

Norther California -- -- --


Arizona/New Mexico/Southern Nevada -- -- --




COI (Path 66) -- -- --

PDCI (Path 65) Low 1000 --



Montana to Northwest (Path 8) -- -- --


Southwest to Calif. (EOR Path 49/WOR Path 46) -- --/-- --/--

Intermountain to Adelanto DC (Path 27) -- -- --

San Diego to CFE (Path 45) -- -- --

Northern to Southern California (Path 26) -- -- --




2024-25 HEAVY WINTER – 25HW2 CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: March 15, 2019 To WECC Staff: April 12, 2019

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

III. ITEMS TO BE PREPARED: From Case 2023-24 HW2 Stability Data Master Dynamics File Significant Changes From Existing System




Canada High -- --

Northwest High High --





Southern California Low Median --

Arizona/New Mexico/Southern Nevada Low Median --




COI (Path 66) -- -- --

PDCI (Path 65) -- -- --












2025 HEAVY SUMMER – 25HS2 CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: March 15, 2019 To WECC Staff: April 12, 2019

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


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

V. TIME: 1500 – 1700 hours MDT


Canada High -- --

Northwest Median High --



Northern California Hydro High -- --

Norther California High High --




Northwest to British Columbia (Path 3) Moderate <2000 66%


COI (Path 66) -- -- --

PDCI (Path 65) -- -- --











2020 HEAVY SUMMER – 20HS3-OP CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: May 03, 2019 To WECC Staff: May 31, 2019

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

III. ITEMS TO BE PREPARED: From Case 2019 HS3 Operating Case Stability Data Master Dynamics File Significant Changes From Existing System




Canada High -- --

Northwest Median/High High --








Northwest to British Columbia (Path 3) Heavy -2300 73%


COI (Path 66) Heavy 4800 100%



Idaho to Northwest (Path 14) Light -- --



Southwest to Calif. (EOR Path 49/WOR Path 46) Low/Moderate 3000/5800 32%/57%



Northern to Southern California (Path 26) -Heavy 4000 100%



2020 LIGHT SUMMER – 20LS1-OP CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: May 03, 2019 To WECC Staff: May 31, 2019

II. PURPOSE: OPERATING CASE – TO REPRESENT ANTICIATED OPERATING CONDITIONS DURING LIGHT LOAD PERIODS. MODERATE FLOWS FROM THE NORTHWEST TO CALIFORNIA AND MODERATE TO HEAVY FLOWS FROM IDAHO/MONTANA TO THE NORTHWEST.

III. ITEMS TO BE PREPARED: From Case 2019 HS3 Operating Case Stability Data Master Dynamics File Significant Changes From Existing System

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



Canada Median -- --

Northwest Median -- --


Colorado/Wyoming Median Median --


Norther California -- High --


Arizona/New Mexico/Southern Nevada -- -- --


Northwest to British Columbia (Path 3) Heavy -2300 73%


COI (Path 66) Heavy 4800 100%



Idaho to Northwest (Path 14) Light -- --



Southwest to Calif. (EOR Path 49/WOR Path 46) Low/Moderate 3000/5800 32%/57%



Northern to Southern California (Path 26) -Heavy 4000 100%



2029-30 HEAVY WINTER – 30HW1 CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: June 21, 2019 To WECC Staff: July 19, 2019

II. PURPOSE: GENERAL 10-YEAR CASE – WITH TYPICAL FLOWS THROUGHOUT WECC. RESOURCE AND TRANSMISSION REPRESENTATION COORDINATED WITH THE REGIONAL PLANNING GROUPS (RPGs) IN WHOSE FOOTPRINT YOUR ENTITY FALLS.




VI. GENERATION: Ensure that your entity’s resource planner is consulted concerning the resources being represented in this power flow base case. HYDRO THERMAL RENEWABLE

Canada High -- --

Northwest High High --





Southern California Low Median --

Arizona/New Mexico/Southern Nevada Low Median --




COI (Path 66) -- -- --

PDCI (Path 65) -- -- --











2030 HEAVY SUMMER – 30HS1 CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: June 21, 2019 To WECC Staff: July 19, 2019

II. PURPOSE: GENERAL 10-YEAR CASE – WITH TYPICAL FLOWS THROUGHOUT WECC. RESOURCE AND TRANSMISSION REPRESENTATION COORDINATED WITH THE REGIONAL PLANNING GROUPS (RPGs) IN WHOSE FOOTPRINT YOUR ENTITY FALLS.




VI. GENERATION: Ensure that your entity’s resource planner is consulted concerning the resources being represented in this power flow base case. HYDRO THERMAL RENEWABLE

Canada High -- --

Northwest Median High --








Northwest to British Columbia (Path 3) Moderate <-2000 66%


COI (Path 66) -- -- --

PDCI (Path 65) -- -- --











2030 LIGHT SPRING – 30LSP1-S CASE DESCRIPTION

I. CASE DUE DATES: To Data Submitter: August 09, 2019 To WECC Staff: September 06, 2019

II. PURPOSE: SPECIALIZED CASE – MODEL LIGHT-LOAD CONDITIONS WITH SOLAR AND WIND SERVING A SIGNIFICANT BUT REALISTIC PORTION OF THE WECC TOTAL LOAD. THE CASE SHOULD ONLY INCLUDE RENEWABLE RESOURCE CAPACITY ADDITIONS THAT ARE ALREADY PLANNED AND INCLUDED IN THE 10-YEAR FUTURE, AND REPRESENT LIKELY AND EXPECTED SYSTEM CONDITIONS CONSISTENT WITH ANY APPLICABLE AND ENACTED PUBLIC POLICY REQUIREMENTS.

III. ITEMS TO BE PREPARED: From Case 2028 LSP1-S Stability Data Master Dynamics File1

Significant Changes From Existing System

IV. LOADS2: Target 60-65% of peak summer loads that would occur during the spring months of March, April, and May.

V. TIME: 1000 – 1400 hours MDT. The time of day has been determined from the data gathered from the latest WECC Production Cost Model. The model uncovered periods of high renewables when loads were approximately 60-65% of WECC peak. The time was chosen to try and capture solar as well as wind generation.

VI. GENERATION HYDRO THERMAL RENEWABLE3

Wind and solar generation targets were developed by analysis of the WECC Common Case Production Cost Model, which utilizes historical weather data for its renewable generation profiles. The data was evaluated to find instances of off-peak loading and high renewable generation. Data was filtered to find wind and solar dispatch consistent with the average of the top 10% of generation hours during the chosen time period when loads were between 60-65% of the WECC peak.

Target renewable capacity values by Powerflow area will be provided. Dispatch values denote the percentage of the total nameplate value for the given resource. Dispatch at individual facilities is left to the Data Submitters judgement, but the aggregate dispatch for the resource should match the percentage stated for each area. Thermal generation should be adjusted to accommodate the higher renewable dispatch conditions.


No Specific Targets -- -- --

NOTE: 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 objective of the case should be kept in mind and schedules should be coordinated between areas prior to data submittal.



PSSEArea

Avg Dispatch (% of Cap), Weighted by Cap, Type and PSSEArea

Wind Turbine Solar PV Solar Thermal

ALBERTA 40%

ARIZONA 41% 84% 99%2

B.C.HYDRO 20%

EL PASO

82%

IDAHO 62% 64%

IMPERIALCA

97%

LADWP 45% 94%

MEXICO-CFE 42% 80%

MONTANA 47% 47%

NEVADA

86% 79%

NEW MEXICO 46% 80%

NORTHWEST 57% 50%

PACE 48% 63%

PG AND E 61% 90%

PSCOLORADO 37% 72%

SANDIEGO 48% 91%

SIERRA 52% 91% 79%

SOCALIF 41% 91% 100%2

WAPA R.M. 49% 47%

WAPA U.M.

47%

2For percent values near or at 100% of nameplate capacity, Data Submitters should provide the maximum recorded output of

any existing Wind Turbine, Solar PV and Solar Thermal resources in their area if 100% of nameplate is not feasible. Future

resources should be modeled with the expected maximum dispatch value.



WECC BASE CASES LISTED BY YEAR OF COMPILATION

(i.e. 19 = 2019 COMPILED BASE CASE) Winter Cases Identified by the second year of case (e.g. 19 for 18-19 HW)

Year

WINTER SPRING SUMMER AUTUMN

Light Heavy Light Heavy Light Heavy Light Heavy

2014 13OP 08G, 13OP 13OP 13OP 03, 07S,

09S, 13OP

09S

2015 13S, 14OP 04, 09G,

14OP

14OP 14OP 06S, 09G,

12S, 14OP

11S

2016 15OP 08S, 10G,

15OP

12S 15OP 15OP 05, 10G,

15OP

10S

2017 11S, 16OP 06, 11G,

16OP

14S, 16S 16OP 16OP 11G, 16OP

2018 17OP 10S, 12G,

17OP

09S, 17OP 17OP 07G, 12G,

15S, 17OP

16S

2019 18OP 08G, 13G,

18OP

18S 18OP 18OP 08G, 13G,

18OP

2020 19OP 14G, 17S,

19OP

19S 19OP 19OP 09G, 14G,

19OP

2021 15G 17S 10G, 15G

2022 11G, 16G 12S 11S 16G

2023 17G 12G, 17G

2024 13G, 18G 13S, 18G

2025 14G, 19G 14G, 19G

2026 15G 15G

2027 16G 16G

2028 17G 17G

2029 18G 18S 18G

2030 19G 19S 19G

S - Scenario Case (2) Current Compilation Schedule

G - General/Planning Case (4)

OP - Operating/OTC Case (5) Proposed Cases

V - Validation Case (placeholder)

Documents

2019 Base Case Compilation Schedule System Data Work … Base Case Compilation Schedule.pdfThe objectives of the 2019 Base Case Compilation Schedule are: I. Provide a detailed schedule,