Northeast Congestion Management/SPS in TCR Calculations James J. Teixeira John Moseley.
Monthly TCR Calculation DRAFT 3 James J. Teixeira 05/11/02 Also review ERCOT Protocols Section 7 for...
-
Upload
leo-webster -
Category
Documents
-
view
232 -
download
0
Transcript of Monthly TCR Calculation DRAFT 3 James J. Teixeira 05/11/02 Also review ERCOT Protocols Section 7 for...
MonthlyTCR Calculation
DRAFT 3James J. Teixeira
05/11/02Also review ERCOT Protocols Section 7
for more details and additional data
Settlement Adjustment Data
Ties Flow
CSC Flow
TCR.ERCOT.COM
Outage Scheduler Query for Study Month to CSV
MS Access – Filter outages to be considered
PowerWorld Simulator
Import RAWD into PowerWorld Simulator
Calculate Shift Factors for each bus for each CSC (1 line of DCKT)
MS Access
Tables and Queries VB
Scripts
PSSE
SSWG Case Selection
Apply IDEV’s
Apply Outages
Change Zone Numbers to Reflect CM Zone
Create PSSE RAWD
Create PSSE SAV Case
Zonal ATC
MS Excel – MON02_AWSF
MUST
MUST – Load SAV Case
Multiple Transfers AC Based FCITC Calculation
Monitored Elements Impact Analysis
MS Excel – MON02_TTC
Shift Factor/Case Data
Process Overview
Process Overview
• Outage Scheduler
• PSSE Version 26.2.3 (Moving to Version 28)– Apply Outages– Change Zone Numbers to CM Zone Number
• PowerWorld Simulator Version 8.0– Calculate raw Shift Factors– Copy/Paste raw Shift Factor and Bus Data to MS
Access
Process Overview Cont’d
• MS Access– Set of Tables, Queries, and VB Scripts– Run VB Scripts to calculate AWSF
• MUST Version 4.02.02 (Moving to Version 5.0)– Calculate First Contingency Incremental Transfer
Capability (FCITC)– Monitored Elements Impact Analysis (Ties and CSC
flows at FCITC)
Transmission Outage Scheduler
• Download Transmission Outages from Outage Scheduler– CSV format
– Load into MS Access
• Determine Transmission Outages to use– No Generation Outages or Resource Plan Information Used
– Transmission Outage of 5 days or more in Study Month
– Group outages to find Period of Month with most/worst concurrent outages
Outage Group 1
Outage Group 2
Beginning of Month
End of Month
Study both periods, select group with most impact on OC0 - CSC TTC.
Line Outages
Outage Grouping
The modified seasonal base case for a particular month will be based on the most limiting situation within the corresponding month. This analysis takes into account all transmission outages of significant duration and impact … (Protocols 7.5.2.2)
PSSE• Determine PSSE Seasonal SSWG On Peak Base Case to
use• Apply Applicable IDEV’s to Base Case to apply latest
transmission updates to case– Supplied by TDSP’s
• Apply Selected Transmission Outages to Base Case• Change Zone Numbers in Base Case with applied
outages to CM Zone numbers• Solve, Save, and Create RAWD• Case also provides Online Generation Level for AWSF
PowerWorld Simulator
• Import RAWD into PowerWorld and Save• In PowerWorld, calculate a set of raw Shift Factors for
each bus for all four CSC’s using TLR Sensitivities– Use Norwood (PSSE Bus #2406) as Transaction Buyer
– Calculate raw SF’s for one line of CSC double circuit and multiply by 2 later
• Copy raw Shift Factors and Bus data to Microsoft Access Tables
PowerWorld TLR Sensitivities
MS Access
• Run VB scripts to calculate all data found in MON02_AWSF.xls– Summation of Weighted Shift Factors– Average Weighted Shift Factors– Min, Max, Average, Std Deviation
• In MON02_AWSF.xls, run VB script to move data from Access to Excel
Contingencies/Limits
• Types Used– 48 Phantom Single
• Multiple modeled elements out for single outage/fault
– 512 Double• Only ones that result in cascade are considered as valid
– All Single Branches 130 KV or greater
• Limits Used– Rate B
– 105 % if Graham – Parker or Sandow – Temple DCKT is the contingency
• Based upon TSDP determination
– 100 % Otherwise
MUST
• Load previously created PSSE save case into MUST• Check/Modify MUST options to use 105% limit for
applicable contingencies, 100% otherwise• In MUST, run Multiple Transfers AC Based FCITC
Calculation– AC is more accurate than DC
• Set up Study Transfers using Min of Subsystem MaxImport and MaxExport
MUST Cont’d
• Calculate Study Transfers
• Examine AC FCITC Multiple Transfers Report to determine lowest AC FCITC where the limiting element is a CRE or the Contingency is a CRE (Protocol 7.5.2)
• This number is the Zonal ATC found in MON02_TTC.xls
MUST Cont’d
• Run Monitored Elements Impact Analysis and set Transfer level to Zonal ATC and Contingency number to the corresponding contingency causing the Zonal ATC from the AC FCITC Multiple Transfers Report.
• Appropriate Ties and CSC Interfaces are defined in file 02cscinterface.mon
• Post-Shift Base Case flow Impacts on Ties and CSC interfaces are the Ties TTC and OC0 – CSC TTC found in MON02_TTC.xls
MUST Options - Cutoffs
MUST Options - Ratings
Settlement Adjustment
ERCOT will determine the total quantity of TCRs for the monthly distribution by adjusting the corresponding modified seasonal base case CSC Limits by the following amount: for each CSC, the sum over all nodes of the product of the expected level of load at each node from the modified seasonal base case multiplied by the difference between the corresponding Shift Factor for that node and CSC and the Zonal Shift Factor. (Protocol 7.5.2.2)
n
1iii AWSF)](SF*[L
Where:n = total number of load busesL i = MW load at bus iSF i = ind. shift factor at bus IAWSF = corresponding zonal shift factor for bus i
TCR Calculation Results
COMMERCIALLY SIGNIFICANT CONSTRAINT #1 - GRAHAM TO PARKER
COMMERCIALLY SIGNIFICANT CONSTRAINT #2 - SANDOW TO TEMPLE
COMMERCIALLY SIGNIFICANT CONSTRAINT #3 - STP TO DOW
COMMERCIALLY SIGNIFICANT CONSTRAINT #4 - PARKER TO GRAHAM
Zonal Flow Direction WEST TO NORTH SOUTH TO NORTH SOUTH TO HOUSTON NORTH TO WEST
Limiting Element1624 LEON 138 1640 LNGLVL M 138 1
3430 SANDOW 138 3675 ROGERS 138 1
42500 DOW345 5 345 42510 DOW138 8 138 A1
1640 LNGLVL M 138 1641 STPHVIL 138 1
Contingency
GRAHAM-PARKER & GRAHAM-PARKER 3247
TEMPSSLT-SANDOW & TEMP SS-SANDOW 3443
P_H_R_ 5-DOW345 5 & DOW345 5-WAP_C710 3715
GRAHAM-PARKER & GRAHAM-PARKER 3247
Zonal ATC 1380 -462 -1674 245Ties TTC 1130 792 1421 366OC0 - CSC TTC -double circuit line flow - MW 726 638 756 237delta CSC - adjustment for Settlement Calculation 57 -46 -54 -57total TCR (following Protocols) 783 592 702 180
Posted Information
• TCR.ERCOT.COM– PTI PSSE save case and RAWD
– MUST configuration files
– MON02_AWSF.xls
– MON02_TTC.xls
– MON02_IM.xls & MON02LoadMappingCMzones.xls
• CSC Development Information at WWW.ERCOT.COM/Participants/CSC/
Questions?