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AG1-405 Transition Sort Retool Results -- Qualifies for Expedited Process

v1.00 released 2023-12-14 10:47

Walnut Grove-Asahi 69 kV

34.2 MW Capacity / 57.0 MW Energy

Introduction

In accordance with Tariff Part VII, Subpart B, section 304, PJM performed load flow analysis (Transition Sort Retool) on all AE1 through AG1 projects that have met eligibility requirements according to Tariff, Part VII, Subpart B, section 303. The purpose of this study is to determine whether a project would be classified as eligible for the Expedited Process (Fast Lane) or if it would be reprioritized to be studied as part of Transition Cycle #1 (TC1) using the criteria from the Expedited Process Eligibility section of Tariff Part VII, section 304. This is not a System Impact Study report.

Below are the results of the study, how the study was performed, criterion used in the evaluation of the Expedited Process vs. TC1 determination, and next steps in the interconnection process for your project.

Eligible for Expedited Process:

The AG1-405 project has been determined to meet the initial screen to be eligible for the Expedited Process according to the Expedited Process Eligibility requirements in Tariff Part VII, Subpart B, section 304. Though your project initially screens as eligible for the Expedited Process, there are several conditions identified under Tariff Part VII, Subpart B, section 304 (B) that could shift your project from the Expedited Process into TC1. Please see "Expedited Process Rules" below.

Transition Sort Retool Study Process and Criteria:

In order to determine Expedited Process vs. Transition Cycle #1 classification, projects which met the Transition Eligibility requirements from Tariff Part VII, Subpart B, section 303 were studied on the base case model that was used for the original System Impact Study analysis. Both a summer peak and light load load flow analysis were performed. Projects that have cost allocation eligibility or are identified as the first to cause a system violation which requires the need for a Network Upgrade with a total estimated cost greater than $5 million will be reprioritized to Transition Cycle #1. All other projects will be eligible for the expedited procedures set forth in Tariff Part VII, Subpart B, section 304 (B).

Expedited Process Eligibility: OATT Tariff Part VII, section 304:

A project is not eligible for the expedited process if it has cost allocation eligibility or is identified as the first to cause, as determined according to Tariff, Part VI, section 217.3, for a Network Upgrade which has a total estimated cost of greater than $5,000,000. Such cost estimate will be based on Transmission Provider's most recently available data.

Not considered in the Transition Sorting: The cost of the Interconnection Facilities is not considered when determining a project's eligibility for the expedited process. Affected Systems upgrade costs are also not considered in the evaluation.

Transition Sort Retool Results Provided:

This report includes a list of:

  1. the overloaded flowgates (overloaded facilities + contingency pair) that the project contributes towards
  2. other interconnection projects that may also contribute to the overloaded facility, and
  3. the total estimated cost for any required Network Upgrades.

Important to Note: Some flowgate overloads that a New Service Request contributes to, but does not contribute enough to meet cost allocation eligibility (per Manual 14A, Attachment B.3), may be reported in this Transition Sort report. These types of flowgates do not affect the classification of the New Service Request as either Expedited Process or Transition Cycle #1 because cost allocation eligibility has not been met.

Next Steps for your project:

Refreshed Retool for Projects in Expedited Process:

After the initial sorting retool, PJM will conduct a refreshed analysis of the projects in the Expedited Process with the Transition Cycle #1 projects lifted from the study case model. After this refreshed analysis (including load flow, short circuit and stability analysis), retooled System Impact Study reports can be delivered to the Project Developers. Once the project's Facilities Study report is completed (and no conditions exist that would require the project to shift to TC1, see "Expedited Process Rules" below), the final GIA will be tendered along with the Facilities Study report.

Expedited Process Rules:

Though your project initially screens to be eligible for the Expedited Process, there are several conditions identified under Tariff Part VII, Subpart B, section 304 (B) that could shift your project into TC1 until the final GIA is tendered.

  • If stability analysis or a sag study is completed during the expedited process, and it is determined that a project has an estimated Network Upgrade cost greater than $5,000,000, the project will be removed from the expedited process and shifted to Transition Cycle #1.
  • If it is determined during the Facilities Study that the cost of a Network Upgrade is now estimated to be greater than $5,000,000, the project will be removed from the expedited process and shifted to Transition Cycle #1.
  • If a project is an uprate (project relies on the Interconnection Facilities of a prior project) whose base project does not qualify for the expedited process, the uprate also will not qualify for the expedited process, regardless of analysis results.
  • If the interconnected Transmission Owner identifies the need for a Network Upgrade due to a violation of their criteria that is in excess of $5M, the project will be removed from the expedited process and shifted to Transition Cycle #1.

General

The Interconnection Customer (IC), has proposed a Solar generating facility located in the EKPC zone McLean County, Kentucky. The installed facilities will have a total capability of 57.0 MW with 34.2 MW of this output being recognized by PJM as Capacity.

Project Information
Queue Number AG1-405
Project Name Walnut Grove-Asahi 69 kV
Developer Name Sunflower Prairie Solar Project, LLC
State Kentucky
County McLean
Transmission Owner EKPC
MFO 57.0 MW
MWE 57.0 MW
MWC 34.2 MW
Fuel Type Solar
Basecase Study Year 2024

Point of Interconnection

AG1-405 will interconnect on the EKPC transmission system tapping the Walnut Grove to Asahi Tap 69 kV line.

Summer Peak Analysis

The Queue Project was evaluated as a 57.0 MW (Capacity 34.2 MW) injection in the EKPC area. Project was evaluated for compliance with applicable reliability planning criteria (PJM, NERC, NERC Regional Reliability Councils, and Transmission Owners). Potential Summer peak period network impacts are listed below:

Important to Note: Some flowgate overloads that a New Service Request contributes to, but does not contribute enough to meet cost allocation eligibility (per Manual 14A, Attachment B.3), may be reported in this Transition Sort report. These types of flowgates do not affect the classification of the New Service Request as either Expedited Process or Transition Cycle #1 because cost allocation eligibility has not been met.

Summer Peak Analysis
Area Facility Description Contingency Name Contingency Type DC|AC Initial Loading Final Loading Rating (MVA) Rating Type MVA to Mitigate MW Contribution Details
EKPC/LGEE 5COOPER2-5ELIHU 161.0 kV Ckt 1 line
342718 to 324141 ckt 1
EKPC_P2-1_5LAUREL CO 161.00 TO 5LAUREL DAM 161.00
CONTINGENCY 'EKPC_P2-1_5LAUREL CO 161.00 TO 5LAUREL DAM 161.00'
 OPEN BRANCH FROM BUS 342754 TO BUS 342757 CKT 1   /*5LAUREL CO   161.0 - 5LAUREL DAM  161.0
END
Single AC 107.23 % 108.69 % 277.0 B 301.07 3.93
EKPC 5LAUREL DAM-5LAUREL CO 161.0 kV Ckt 1 line
342757 to 342754 ckt 1
EXT_B-69-25
CONTINGENCY 'EXT_B-69-25'
 OPEN BRANCH FROM BUS 324130 TO BUS 324141 CKT 1   /*5ALCALDE     161.0 - 5ELIHU       161.0
 OPEN BRANCH FROM BUS 324141 TO BUS 324514 CKT 1   /*5ELIHU       161.0 - 2ELIHU        69.0
 OPEN BRANCH FROM BUS 324141 TO BUS 324514 CKT 2   /*5ELIHU       161.0 - 2ELIHU        69.0
 OPEN BRANCH FROM BUS 324141 TO BUS 342718 CKT 1   /*5ELIHU       161.0 - 5COOPER2     161.0
END
Single AC 103.12 % 105.16 % 200.0 B 210.31 3.92
EKPC 5LAUREL DAM-5LAUREL CO 161.0 kV Ckt 1 line
342757 to 342754 ckt 1
EXT_324130 5ALCALDE 161 324141 5ELIHU 161 1
CONTINGENCY 'EXT_324130 5ALCALDE 161 324141 5ELIHU 161 1'
 OPEN BRANCH FROM BUS 324130 TO BUS 324141 CKT 1   /*5ALCALDE     161.0 - 5ELIHU       161.0
END
Single AC 99.16 % 101.46 % 200.0 B 202.92 4.42
DAY/EKPC 7SPURLOCK-09STUART 345.0 kV Ckt 1 line
342838 to 253077 ckt 1
AEP_P1-2_#1027
CONTINGENCY 'AEP_P1-2_#1027'
 OPEN BRANCH FROM BUS 248000 TO BUS 324010 CKT 1   /*06CLIFTY     345.0 - 7TRIMBL REAC 345.0
 OPEN BRANCH FROM BUS 324010 TO BUS 324114 CKT 1   /*7TRIMBL REAC 345.0 - 7TRIMBLE CO  345.0
END
Single AC 99.92 % 100.23 % 1532.0 B 1535.52 5.32
DAY/EKPC 7SPURLOCK-09STUART 345.0 kV Ckt 1 line
342838 to 253077 ckt 1
EXT_324010 7TRIMBL REAC 345 324114 7TRIMBLE CO 345 1
CONTINGENCY 'EXT_324010 7TRIMBL REAC 345 324114 7TRIMBLE CO 345 1'
 OPEN BRANCH FROM BUS 324010 TO BUS 324114 CKT 1   /*7TRIMBL REAC 345.0 - 7TRIMBLE CO  345.0
END
Single AC 99.92 % 100.23 % 1532.0 B 1535.48 5.32
EKPC/LGEE 5COOPER2-5ELIHU 161.0 kV Ckt 1 line
342718 to 324141 ckt 1
EKPC_P4-5_LAURL S50-1024
CONTINGENCY 'EKPC_P4-5_LAURL S50-1024'
 OPEN BRANCH FROM BUS 324688 TO BUS 342781 CKT 1   /*2PITTSBRG KU  69.0 - 5PITTSBURG   161.0
 OPEN BRANCH FROM BUS 342781 TO BUS 342820 CKT 1   /*5PITTSBURG   161.0 - 5TYNER       161.0
 OPEN BUS 342754                                   /*5LAUREL CO   161.0
END
Breaker AC 126.91 % 129.31 % 277.0 B 358.2 6.54
EKPC/LGEE 2SOMERSET KU-2FERGUSON SO 69.0 kV Ckt 1 line
342287 to 324531 ckt 1
EKPC_P2-3_COOP S42-1064
CONTINGENCY 'EKPC_P2-3_COOP S42-1064'
 OPEN BRANCH FROM BUS 341392 TO BUS 342727 CKT 1   /*2DENNY        69.0 - 5DENNY       161.0
 OPEN BUS 342718                                   /*5COOPER2     161.0
 OPEN BUS 342903                                   /*1COOPER2 G    20.0
END
Breaker AC 92.89 % 109.79 % 105.0 B 115.28 17.75
EKPC/LGEE 2SOMERSET KU-2FERGUSON SO 69.0 kV Ckt 1 line
342287 to 324531 ckt 1
EKPC_P2-3_COOP S42-210G
CONTINGENCY 'EKPC_P2-3_COOP S42-210G'
 OPEN BUS 342718   /*5COOPER2     161.0
 OPEN BUS 342903   /*1COOPER2 G    20.0
END
Breaker AC 92.89 % 109.78 % 105.0 B 115.27 17.76
EKPC/LGEE 2SOMERSET KU-2FERGUSON SO 69.0 kV Ckt 1 line
342287 to 324531 ckt 1
EKPC_P2-2_COOPER 2 161
CONTINGENCY 'EKPC_P2-2_COOPER 2 161'
 OPEN BUS 342718   /*5COOPER2     161.0
END
Bus AC 92.96 % 109.85 % 105.0 B 115.35 17.76
EKPC/LGEE 2SOMERSET KU-2FERGUSON SO 69.0 kV Ckt 1 line
342287 to 324531 ckt 1
EKPC_P7-1_COOP 161 DBL 2
CONTINGENCY 'EKPC_P7-1_COOP 161 DBL 2'
 OPEN BRANCH FROM BUS 324141 TO BUS 342718 CKT 1   /*5ELIHU       161.0 - 5COOPER2     161.0
 OPEN BRANCH FROM BUS 342718 TO BUS 342757 CKT 1   /*5COOPER2     161.0 - 5LAUREL DAM  161.0
END
Tower AC 137.99 % 154.98 % 105.0 B 162.73 17.68
EKPC 2SOMERSET-2SOMERSET KU 69.0 kV Ckt 1 line
342286 to 342287 ckt 1
EKPC_P7-1_COOP 161 DBL 2
CONTINGENCY 'EKPC_P7-1_COOP 161 DBL 2'
 OPEN BRANCH FROM BUS 324141 TO BUS 342718 CKT 1   /*5ELIHU       161.0 - 5COOPER2     161.0
 OPEN BRANCH FROM BUS 342718 TO BUS 342757 CKT 1   /*5COOPER2     161.0 - 5LAUREL DAM  161.0
END
Tower AC 115.68 % 132.78 % 115.0 B 152.69 19.68
EKPC/LGEE 5COOPER2-5ELIHU 161.0 kV Ckt 1 line
342718 to 324141 ckt 1
EKPC_P7-1_LAURL 161 DBL
CONTINGENCY 'EKPC_P7-1_LAURL 161 DBL'
 OPEN BRANCH FROM BUS 342754 TO BUS 342757 CKT 1   /*5LAUREL CO   161.0 - 5LAUREL DAM  161.0
 OPEN BRANCH FROM BUS 342754 TO BUS 342781 CKT 1   /*5LAUREL CO   161.0 - 5PITTSBURG   161.0
 OPEN BRANCH FROM BUS 342781 TO BUS 342820 CKT 1   /*5PITTSBURG   161.0 - 5TYNER       161.0
END
Tower AC 126.99 % 129.4 % 277.0 B 358.42 6.54

Light Load Analysis

At this time light load analysis not required for this project.

System Reinforcements

The table below lists all network upgrades which resolve the identified overloaded facilities in this report.

Important to Note: Some flowgate overloads that a New Service Request contributes to, but does not contribute enough to meet cost allocation eligibility (per Manual 14A, Attachment B.3), may be reported in this Transition Sort report. These types of flowgates do not affect the classification of the New Service Request as either Expedited Process or Transition Cycle #1 because cost allocation eligibility has not been met.

Reinforcements previously identified by Transmission Owners for violations on lower voltage facilities are included in this report. Transmission Owner analysis will be updated as part of the Expedited Process and Transition Cycle 1 retools.

System Reinforcements
RTEP ID Title Total Cost
n5780 Reconductor Stuart-Spurlock line with twin bundle 1033 Curlew ACCR conductor. $17,000,000
n7773.1 Replace the 1200A current transformer at Somerset with a 2000A current transformer. $35,000
n6232 Replace the 500 MCM copper jumpers at the Somerset substation using 750 MCM copper or equivalent $250,000
n6232.1 Replace the 1200A interconnection metering CTs with 2000A equipment. $70,000
(TBD) LGEE violation (non PJM area). EKPC continuous rating is 267 MVA. $0
n8368.1 Increase the maximum operating temperature of the 795 MCM ACSR conductor in the Cooper-Elihu 161 kV line section to 275 degrees F (6.7 miles) $680,000
n7771.2 Increase the maximum operating temperature of the Laurel County-Laurel Dam 161 kV line section 795 MCM conductor to 212 degrees F (~0.2 miles) $40,000
n7771.1 Increase the maximum operating temperature of the Laurel County-Laurel Dam 161 kV line section 795 MCM conductor to 167 degrees F (~0.2 miles) $35,000

Attachments

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Uprate Chain
Project Project Status MFO MWE MWC Disposition
AG1-405 Active 57.0 57.0 34.2 Expedited Process
AG1-406 Active 79.0 22.0 22.0 Expedited Process

Conclusion

The Transition Sort load flow retool results indicate that AG1-405 is eligible for the Expedited Process per PJM Tariff Part VII, Subpart B, section 304 (A). See next steps for your project in the "Introduction" section above.