1. Base Case Build Process
Elena Melloni
Associate Engineer
Western Electricity Coordinating Council

2. Western Electricity Coordinating Council
Discussion Outline
WECC Base Case Building Procedure
Powerflow construction
Dynamics
Conversions
Posted Zip files
Reporting Data Anomalies
Western Electricity Coordinating Council

3. Base Case Compilation Schedule
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
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
HW1-S
10/06/17
11/03/17
12/15/17
12/29/17
01/05/18
01/19/18
HW3-OP
11/17/17
12/15/17
01/12/18
02/9/18
02/23/18
03/09/18
03/23/18
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
HW2
02/16/18
03/16/18
05/11/18
05/18/18
06/01/18
06/15/18
2024 HS2
2019 HS3-OP
04/06/18
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
HW1
07/06/18
08/03/18
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
Western Electricity Coordinating Council

4. Base Case Building Power Flow
Data Submitter uploads “prerun” files:
Area Specific power flow data
L&R spreadsheet
Any Dynamics model changes/updates
Any tie line changes (must be coordinated!!!!)
List of significant changes
Any additional info that will help with base case compilation
Western Electricity Coordinating Council

5. Area Interchange Schedules
BC Hydro Interchange with Northwest
2300 MW
Northwest Interchange with BC Hydro
-2300 MW
Area interchange case specific spreadsheet: located on the team site
Western Electricity Coordinating Council

6. Western Electricity Coordinating Council
Extracting Area Data
Western Electricity Coordinating Council

7. The Master Tie Line File
Contains data for the following:
Branches
Transformers
Line connected shunts
Transformer impedance tables
Interface data (Paths)
Branch interface data
Zones
Owners
BAAs
Area Interchanges
Western Electricity Coordinating Council

8. Western Electricity Coordinating Council
Tying It All Together
Western Electricity Coordinating Council

9. Power Flow Solution and Data Checking
Tie line check
Island check
Edit table checks
Checkazo.p
Mustfix.p
Checks.p
svdsnap.p
Pathmoni.p
Dchk
Overload check
Branches (Chkrating.p & SADD)
Paths (Pathmoni.p)
DCINTMT.p
Insert Gen ID (WSM map)
Need data for others
Fix owner epcls
Fix bad gen owner.p
Fix owner–noparticipation.p
Qtab correction.p
Western Electricity Coordinating Council

10. PF Data Checking continued
PSS®E Users Data
InsertLID.p
Baseloader.p
InsertTurbine.p
FillRatingsPSSe.p
Contingencies (Operations Cases)
Replog & Steady state and Dynamics Dashboard (SADD)
PowerWorld
Western Electricity Coordinating Council

11. Base Case Building - Dynamics
The Master Dynamics File (MDF)
Models
Updates in PSLF format
Temporary vs. permanent changes
Condenser and pump check
Composite load models
Western Electricity Coordinating Council

12. Initializing Dynamics Data
Reading in the MDF
Missing data (updated ID or netted)
Duplicate models
Initialization
Governor errors (check real power limits)
Exciter errors (bad voltage profiles)
Other messages
Western Electricity Coordinating Council

13. Western Electricity Coordinating Council
Running and Plotting
A no-disturbance run
The DYTOOLS disturbance routine
Ringdown (Chief Jo Break)
Double Palo Verde Outage (when PDCI flow is N-S)
Loss of PDCI (when PDCI flow is S-N)
Post-transient solution
Standard Disturbances
Midway-Diablo and Midway-Gates
Comanche-Daniels Park
Colorado River – Red Bluff
Hells Canyon – Brownlee
Double Palo Verde Outage or loss of PDCI
DYTOOLS?
Western Electricity Coordinating Council

14. Western Electricity Coordinating Council
Plotting
Plotting the channel file
Searching for the largest deviation (spread)
Plotting Parameter
Efd – 0.063
PG – 1.0
Spd – 0.000
Other paramters – qg, qsvc, qstc
Western Electricity Coordinating Council

15. Western Electricity Coordinating Council
Plotting
Western Electricity Coordinating Council

16. Power Flow Conversions
PSS®E Conversion
Case Prep (combine SVDs, Net DG, negative transformer types, shift ratings)
WECCLF
Dummy bus
Case IDV
Difference Compare
PowerWorld
EPC
Difference Compare
Dynamics
Western Electricity Coordinating Council

17. Base Case Building - Comments
Types
Submitted in EPCL, EPC, .m, or by list
Epcl_xtractv21d.p
MUST be made to review case
Changes to tie lines must be coordinated
Extensive data changes
Western Electricity Coordinating Council

18. Files included in ZIP folders
Base Case (.sav, .epc, .raw, .pwb)
Dynamics(.dyd, e.dyd)
ASMAT
Annual Study Program Results Log
Data Checking (Replog, CaseCheck Dynamics, CaseCheck Powerflow, SADD)
Pss_exempt.dat
Supplemental.zip
Signoff
Bubble (.jpg, Bubble_33.drw, Bubble_33.irf)
PTI data Templates (Ba data, baseload, composite load long IDs, turbine type)
*_pf.idv
Loads_*.csv
Western Electricity Coordinating Council

19. Reporting Data Anomalies
Master Tie Line File Data
Multi-section lines
Series Compensation
New Phase Shifters
PSS Exemptions
Dynamics Data
Western Electricity Coordinating Council

20. Western Electricity Coordinating Council
Questions?
Elena Melloni:
Nick Hatton:
Matt Torgesen:
Western Electricity Coordinating Council