Transmission operations ensure the flow of electricity
Our operations reporting, coordination and maintenance efforts help keep the lights on for 30 million people in our balancing authority.
Operations
Transmission access charge (TAC)
Charges assessed, on behalf of the Participating Transmission Owner, to parties who require access to the ISO grid.
Transmission operating procedures
All transmission outages must be reported to the California ISO with a description of the cause and all remedial actions taken. Information is confidential. Access requires a valid California ISO user certificate.
Transmission register
A register of transmission facilities within the California ISO Control Area. In accordance with the Federal Energy Regulatory Commission (FERC), the California ISO is to provide limited access to the Register of Transmission Facilities and Entitlements (RTFE) to market participants with a demonstrated, legitimate business need for such access in accordance with specified screening procedures (FERC Order issued Jan 24, 2003, Docket No. ER03-219). RTFE information is treated as critical energy infrastructure information.
Transmission constraints
Maintenance
Transmission maintenance procedures
Policies and procedures serve as guidelines for participating transmission owners.
Transmission Maintenance Coordination Committee
This independent committee gathers input from participating transmission owners and interested stakeholders on the ISO transmission maintenance standards, reviews proposed changes, recommends revisions to the standards, and advises the ISO vice president responsible for transmission maintenance.
Participating transmission owner tariffs and agreements
Participating transmission owner tariffs
Each participating transmission owner's tariffs for facilities under ISO operational control.
Participating transmission owner applications submitted
See terms and conditions for agreements between California ISO and transmission owners.