Peak Load Contribution Daily Scaling Factor
Education
Markets Settlements Subcommittee
June 16, 2015
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Obligation Peak Load – Annual Allocation
•
Each PJM Electric Distribution Company (EDC) is responsible for
allocating the previous summer’s weather normalized peak to enduse customers in the zone (both retail and wholesale) by Dec. 31
prior to the start of the Delivery Year in the eRPM system.
100
100
Zonal WN Peak =
1000 MW
250
100
200
250
Often referred to as a
“PLC” or “capacity
ticketing” process.
Wholesale Area 1
Wholesale Area 2
Wholesale Area 3
LSE A
Retail
LSE B
Area 1
LSE C
Obligation Peak Load allocation for a zone/area is constant and effective for the entire Delivery Year.
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Obligation Peak Load – Daily Allocation
• Areas with Retail Choice can modify
LSE share on a daily basis by uploading
XML files to eRPM.
• XML Uploads must be submitted by
EDC at least 36 hours prior to the start
of the operating day.
– Starting 1/1/2015, values can be
corrected until 12 noon the business
day following the operating day.
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Obligation Peak Load – Daily Allocation
• The daily sum of all the uploaded LSE peak load contribution
data in a zone/area will be scaled to equal the Annual Obligation
Peak Load Allocation for the zone/area
• The Daily Load Scaling Factor will equal 1.0 in cases where the
sum of the uploaded LSE Peak Load Contribution values equal
the Annual Allocation for that zone/area.
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Example
Assume:
Zonal Peak Load MW = 100
LSE
Assigned PLC Value
(MWh)
Daily Scaling Factor
Revised PLC Value
A
20
1.05263
21.05
B
20
1.05263
21.05
C
20
1.05263
21.05
D
20
1.05263
21.05
E
15
1.05263
15.8
Total
95
100
• EDC initially uploaded a total of 95 MW
• Expected Zonal Peak Load = 100 MW
• Daily Zonal Scaling Factor calculated as:
• 100/95 = 1.05263
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Peak Load Summary Screen in eRPM
Daily Load Scaling Factor
Uploaded PLC MW * Daily Scaling Factor = LSE Obligation Peak Load
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Network Service Peak Load (NSPL) Process
• NSPL values are uploaded to eRPM at the same time as PLC
values
• A similar scaling process does not exist for NSPL
• If an EDC does not carve exactly to the expected Zonal total,
PJM must manually contact the EDC and updated allocation
values must be provided by the EDC.
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