This worksheet may be used to assist Electric Distribution Companies (EDCs) and Retail Load Aggregators (a.k.a. Alternate Suppliers) participating in State-required retail access programs for rebillings required due to load data discrepancies identified after the PJM initial billing and subsequent reconciliation billing has been performed. Rebilling dollar amounts that are calculated and formally agreed to by both parties may be submitted to the PJM Market Settlements Department for inclusion as line item adjustments in the current month's billing.
Energy-Related Rebillings
These PJM billing items are calculated based on hourly Retail Load Responsibility (RLR) Energy Schedules reported via PJM eSchedules. Hourly energy reconciliation data submitted by EDCs based on metered usage are used to "true-up" these billing items two months (three months for PJM West) after the original billing month. Rebilling for hourly energy discrepancies identified after the PJM reconciliation deadline (the last day of the second month following the original billing month, i.e. March 31st for January energy --- or --- the last day of the third month following the original billing month, i.e. April 30th for January energy, for PJM West) may be calculated as follows:
| Billing Item to be Adjusted |
To calculate the hourly billing adjustment amount, multiply the hourly Energy Discrepancy* by… |
| Spot Market Energy Charges |
…the real-time LMP at the designated source/sink of the Retail Load Responsibility contract in PJM eSchedules for that hour (typically the EDC's zonal average LMP). |
| Regulation Charges |
…the applicable East or West Regulation Billing Determinant for that hour. |
| Spinning Reserves Charges |
…the applicable Spinning Reserve Billing Determinant for that day. |
| Transmission Losses Credits |
…the Transmission Losses Billing Determinant for that hour. |
| PJM Scheduling, System Control and Dispatch Service Charges |
…the PJM Scheduling, System Control & Dispatch Service Billing Determinant for that month. |
| Transmission Owner Scheduling, System Control and Dispatch Service Charges |
…the applicable Zone's Scheduling, System Control & Dispatch Service Billing Determinant for that month. |
* Energy Discrepancy values represent the MWh difference between the reconciled energy schedule and the revised actual energy usage.
Transmission Peak Load-Related Rebillings
These PJM billing items are calculated using daily Network Transmission Service Peak Load Contributions (in tenths of a MW) submitted by EDCs. Rebilling for daily peak load discrepancies identified after the PJM deadline (noon on the day two PJM business days prior to the day for which the peak load applies) may be calculated as follows:
|
Billing Item to be Adjusted |
To calculate the daily billing adjustment amount, multiply the daily Peak Load Contribution Discrepancy* by… |
| Network Transmission Service Charges |
…the applicable Zone's annual Network Integration Transmission Service rate (see PJM Tariff, Attachment H) divided by 365 |
| Reactive Supply and Voltage Control Charges |
…the applicable Zone's total monthly Reactive revenue requirement divided by that Zone's monthly total zone peak transmission use times the monthly total PJM zone peak transmission use divided by the monthly total PJM zone and non-zone peak transmission use.** |
* Peak Load Contribution Discrepancy values represent the MW differences between the originally submitted and revised peak load values.
** Zonal and PJM revenue requirements and peak transmission use data available in the monthly Reactive Summary customer billing reports.
In addition, these PJM monthly credits are allocated based on Network and Firm Transmission Customers’ demand charges and, due to adjustments made to Network Transmission Service Charges above, rebilling may be calculated as follows:
|
Billing Item to be Adjusted* |
To calculate the monthly billing adjustment amount, multiply the net monthly Network Transmission Service Charge Adjustment by… |
|
Non-Firm Point-to-Point Transmission Service Credits |
Total PJM Non-Firm Transmission Service Revenues for that month divided by total PJM Network and Firm Demand Charges for that month.** |
* Note that adjustments are not applicable for billing items for months when there were no revenues to be allocated.
** Total PJM allocated revenues and demand charges available in the Monthly Credit Allocations customer billing reports.
Capacity Peak Load-Related Rebillings
PJM capacity obligations are calculated using daily Capacity Peak Load Contributions (in tenths of a MW) submitted by EDCs. Since day-ahead capacity credit markets are cleared based on these capacity obligations, there is no exact method of determining rebilling amounts due to daily peak load discrepancies identified after the PJM deadline (noon on the day two PJM business days prior to the day for which the peak load applies). All capacity-related rebilling must be performed using bilaterally agreed-upon prices which may take into account the applicable PJM capacity credit market clearing prices and/or capacity deficiency rates.