Congestion Analysis The total number of congestion events experienced by the ERCOT system decreased in April. There were 38 instances over 26 days on the Generic Transmission Constraints (GTCs) in April. Notable Constraints Nodal protocol section 3.20 specifies that ERCOT shall identify transmission constraints that are active or binding three or more times within a calendar month. As part of this process, ERCOT reports congestion that meets this criterion to ROS. In addition ERCOT also highlights notable constraints that have an estimated congestion rent exceeding $1,000,000 for a calendar month. These constraints are detailed in the table below. Rows highlighted in blue indicate the congestion was affected by one or more outages. For a list of all constraints activated in SCED for the month of April, please see Appendix A at the end of this report. # of Days Contingency Overloaded Congestion Transmission Constraint Name Element Rent Project Active Oncor_NW Carrollton Carrollton - CRLNW-LWSSW Northwest - 23 $27,871,275 345kV Lakepointe Tnp LakePointe 138kV (5488) LP&L Option 4ow & Panhandle $14,267,102 Basecase PNHNDL GTC 25 Loop (5180, 5208) Jones Street Tnp Ti Tnp - West Tnp $11,808,730 13 to Lewisvil 138kV Pawnee Switching Elmcreek-Sanmigl $4,568,451 Station - Calaveras 6 345kV 345kV Andrews County Wink Sub to South - Amoco $4,289,903 YUCCA DRIVE 10 Three Bar Tap SWITCH LIN 138kV Btu_Jack_Creek - Houston Import $3,467,023 Jewet-Sng 345kV Twin Oak Switch 11 Project (4458) 345kV CAGNON to Cico - Comfort $3,187,828 21 KENDALL LIN 1 138kV Omega - Horse $3,087,990 Basecase Hollow Generation 18 Tie 345kV Vensw-Evrsw Oakhill Tap 2 - Tate $2,910,643 3 345kV Tap East 138kV Yucca Re Roserock Yucca Drive Switch 14 $2,891,761 Junction Solar Plant to L - Gas Pad 138kV (4549)
Congestion Analysis The total number of congestion events experienced by the ERCOT system decreased in April. There were 38 instances over 26 days on the Generic Transmission Constraints (GTCs) in April. Notable Constraints Nodal protocol section 3.20 specifies that ERCOT shall identify transmission constraints that are active or binding three or more times within a calendar month. As part of this process, ERCOT reports congestion that meets this criterion to ROS. In addition ERCOT also highlights notable constraints that have an estimated congestion rent exceeding $1,000,000 for a calendar month. These constraints are detailed in the table below. Rows highlighted in blue indicate the congestion was affected by one or more outages. For a list of all constraints activated in SCED for the month of April, please see Appendix A at the end of this report. Contingency Name Overloaded Element # of Days Constraint Active Congestion Rent Transmission Project CRLNW-LWSSW 345kV Carrollton Northwest - Lakepointe Tnp 138kV 23 $27,871,275 Oncor_NW Carrollton - LakePointe (5488) Basecase PNHNDL GTC 25 $14,267,102 LP&L Option 4ow & Panhandle Loop (5180, 5208) Jones Street Tnp to Lewisvil Ti Tnp - West Tnp 138kV 13 $11,808,730 Elmcreek-Sanmigl 345kV Pawnee Switching Station - Calaveras 345kV 6 $4,568,451 Wink Sub to YUCCA DRIVE SWITCH LIN Andrews County South - Amoco Three Bar Tap 138kV 10 $4,289,903 Jewet-Sng 345kV Btu_Jack_Creek - Twin Oak Switch 345kV 11 $3,467,023 Houston Import Project (4458) CAGNON to KENDALL LIN 1 Cico - Comfort 138kV 21 $3,187,828 Basecase Omega - Horse Hollow Generation Tie 345kV 18 $3,087,990 Vensw-Evrsw 345kV Oakhill Tap 2 - Tate Tap East 138kV 3 $2,910,643 Re Roserock Solar Plant to L Yucca Drive Switch - Gas Pad 138kV 14 $2,891,761 Yucca Junction (4549)
05._April_18_ERCOT_Operations_Report_Public.docx