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​Transmission Losses Product

​Bonneville Power Administration (BPA) Power Services offers to sell transmission return of losses to interested customers. If customers choose to purchase the transmission losses from BPA Power Services, customers need to contact BPA Power Marketing, contact information below.

Product:
Transmission losses as defined by the BPA Transmission Services. Customers will need to arrange a contract with BPA Power Services. BPA Transmission Services will bill customers on behalf of Power Services using the price below.

Price:
BPA Power Services will charge customers an energy and capacity price in accordance with Section 9 of the 2022 Power Rate Schedules and General Rate Schedule Provisions. See below:

Capacity
9.2 Capacity Rate and Billing Determinants
The Capacity Rate for Real Power Losses is 5.52 mills/kWh. The monthly Capacity Billing Determinant shall be the applicable billing determinant, in kilowatthours, used to calculate the Energy Charge for Real Power Losses described above in Section 9.1.3.
 
Energy
9.1 Energy Rates and Billing Determinants
The energy rate for Real Power Losses will differ depending on whether BPA is a participant in the Western Energy Imbalance Market (EIM). The billing determinants do not change.
 
9.1.1 Energy Rate when BPA is not an EIM Participant
If BPA is not a participant in the EIM, then the energy rate for Real Power Losses shall be the greater of 0 and the applicable average hourly Powerdex Mid-C Index price for firm power for the hour in which the loss occurred. In the event the hourly Powerdex Mid-C price index is no longer a reliable price BP-22-A-02-AP01 FPS-22 Page 28 index, the index will be replaced for purposes of Real Power Losses energy charges by an applicable new hourly energy index at a hub at which Northwest parties can trade between October 1, 2021, and September 30, 2023. BPA will provide notice of such a change as soon as practicable.
 
9.1.2 Energy Rate when BPA is an EIM Participant
If BPA is a participant in the EIM, then the energy rate for Real Power Losses will be the greater of 0 and the applicable hourly average Load Aggregation Point (LAP) price for BPA as determined by the Market Operator (MO) under Section 29.11(b)(3)(C) of the MO Tariff for the hour in which the loss occurred
 
9.1.3 Energy Billing Determinants
For BPA Transmission customers taking Point-to-Point (PTP) transmission service the Energy Billing Determinant shall be the hourly scheduled energy amounts, in kilowatthours, multiplied by the applicable loss factor(s) specified in BPA’s Open Access Transmission Tariff (OATT), Schedule 11. For BPA Transmission customers taking Network Integration Transmission (NT) service the Energy Billing Determinant shall be the hourly non-federal resource and/or Slice output schedule amounts, in kilowatthours, multiplied by the applicable loss factor(s) specified in BPA’s OATT, Schedule 11.
 

Customers are also encouraged to be familiar with the Transmission Business Line “Real Power Loss” business practice. 

Contact information:

BPA Power Marketing
BPAmarketing@bpa.gov
(503) 230-4111