Transmission Losses Product

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.

Transmission losses are defined by the BPA Transmission Services. Customers must arrange a contract with BPA Power Services, and BPA Transmission Services will bill customers on behalf of Power Services using the price structure below, in accordance with Section 9 of the 2024 Power Rate Schedules and General Rate Schedule Provisions (GRSPs). See below:

9. Real Power Losses

Power Services may sell energy and capacity to BPA Transmission customers for Real Power Loss returns as defined by BPA Transmission Services. If a customer chooses to purchase losses from Power Services, then the customer must contract with Power Services. 

9.1 Energy Rates and Billing Determinants 

9.1.1 Energy Rate

The energy rate for Real Power Losses will be the greater of 0 and the hourly 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. In the event of a Market Contingency pursuant to Section 10 of Attachment Q to the BPA Tariff, BPA will use an available energy index in the Pacific Northwest.

9.1.2 Energy Billing Determinants

For BPA Transmission customers taking Point-to-Point (PTP) transmission service the Energy Billing Determinant will 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 will 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. 

9.2 Capacity Rate and Billing Determinants

The Capacity Rate for Real Power Losses is 6.38 mills/kWh. The monthly Capacity Billing Determinant will be the applicable billing determinant, in kilowatthours, used to calculate the Energy Charge for Real Power Losses described above in Section 9.1.2

Contact information: 

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