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AE2-173 Transition Sort Retool Results -- Reprioritized to Transition Cycle #1

v1.00 released 2024-01-10 16:00

McLean 345 kV

50.0 MW Capacity / 50.0 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.

Transition Cycle #1:

The AE2-173 project has not met the Expedited Process Eligibility requirements in Tariff Part VII, Subpart B, section 304 and will therefore be reprioritized to Transition Cycle #1. Please see "Transition Cycle #1 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:

Transition Cycle #1 Rules:

Refer to Tariff Part VII, Subpart B, section 304 (C) for the Transition Cycle #1 Project Rules.

Transition Cycle #1 will start no later than one year from the Transition Start Date (July 10, 2023). Transition Cycle #1 will run simultaneously with the expedited process, however Transition Cycle #1, Phase III will not begin until all expedited process projects have been completed.

Projects that are reprioritized to Transition Cycle #1 will not need to re-apply to the Interconnection Cycle Process. Therefore, there is no Application Review Phase for Transition Cycle #1. The cycle process for Transition Cycle #1 includes three Study Phases and three Decision Points:

  1. Phase I System Impact Study and Decision Point I; and
  2. Phase II System Impact Study and Decision Point II; and
  3. Phase III System Impact Study and Decision Point III

Refer to Tariff Part VII, Subpart D, section 307 for the Transition Cycle #1 study process.

General

The Interconnection Customer (IC), has proposed a Storage generating facility located in the ComEd zone McLean County, Illinois. The installed facilities will have a total capability of 50.0 MW with 50.0 MW of this output being recognized by PJM as Capacity.

Project Information
Queue Number AE2-173
Project Name McLean 345 kV
Developer Name Blooming Grove Solar Energy Center LLC
State Illinois
County McLean
Transmission Owner ComEd
MFO 50.0 MW
MWE 50.0 MW
MWC 50.0 MW
Fuel Type Storage
Basecase Study Year 2022

Point of Interconnection

AE2-173 will interconnect on the ComEd transmission system at the McLean 345 kV substation by utilizing the same attachment facilities as AB2-047, and then AE1-205.

 

Summer Peak Analysis

The Queue Project was evaluated as a 50.0 MW (Capacity 50.0 MW) injection in the ComEd 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
CE LORETTO ; B-AD1-100 TAP 345.0 kV Ckt 1 line
270704 to 934720 ckt 1
COMED_P4_012-45-BT12-14
CONTINGENCY 'COMED_P4_012-45-BT12-14'
 TRIP BRANCH FROM BUS 270717 TO BUS 930740 CKT 1   /*DRESDEN  ; R 345.0 - AB1-122 TAP  345.0
 TRIP BRANCH FROM BUS 270853 TO BUS 270717 CKT 1   /*PONTIAC  ; R 345.0 - DRESDEN  ; R 345.0
END
Breaker AC 126.36 % 127.55 % 2107.0 STE 2687.45 25.21
CE PONTIAC ; B-LORETTO ; B 345.0 kV Ckt 1 line
270852 to 270704 ckt 1
COMED_P4_012-45-BT12-14
CONTINGENCY 'COMED_P4_012-45-BT12-14'
 TRIP BRANCH FROM BUS 270717 TO BUS 930740 CKT 1   /*DRESDEN  ; R 345.0 - AB1-122 TAP  345.0
 TRIP BRANCH FROM BUS 270853 TO BUS 270717 CKT 1   /*PONTIAC  ; R 345.0 - DRESDEN  ; R 345.0
END
Breaker AC 134.87 % 136.23 % 1837.0 STE 2502.56 25.22

Light Load Analysis

The Queue Project was evaluated as a 50.0 MW (Capacity 50.0 MW) injection in the ComEd area. Project was evaluated for compliance with applicable reliability planning criteria (PJM, NERC, NERC Regional Reliability Councils, and Transmission Owners). Potential light load 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.

Light Load Analysis
Area Facility Description Contingency Name Contingency Type DC|AC Initial Loading Final Loading Rating (MVA) Rating Type MVA to Mitigate MW Contribution Details
CE AD1-100 TAP-WILTON ; B 345.0 kV Ckt 1 line
934720 to 270926 ckt 1
Base Case Single AC 99.9 % 100.05 % 1364.0 A 1364.68 7.99

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
n8184 ComEd 345 kV L11212 - Replace 2 345 kv CBs, upgrade line relay scheme, station conductor upgrades and reconductor L11212 $28,000,000
n6840 Install a new 345kV bus tie circuit breaker at Station 12 Dresden $3,444,645

Attachments

Conclusion

The Transition Sort load flow retool results indicate that AE2-173 is not eligible for the Expedited Process per PJM Tariff Part VII, Subpart B, section 304 (A) will be reprioritized to Transition Cycle #1. See next steps for your project in the "Introduction" section above.