TTC Atc Afc Calculations. 5.1 TTC/ATC/AFC Protocols - Phase 1, Market to Non-Market. Purpose: The calculation of TTC and ATC pertains to a forecast of transmission capacity that may be available for use by transmission customers. Use of transmission capacity in one system can impact the loadings, voltages and stability of neighboring systems. Because of this interrelationship, neighboring entities must exchange pertinent data for each entity to determine the TTC and ATC/AFC values for its own transmission system. The exchange of data related to calculation of TTC and ATC is necessary to assure reliable coordination, and also to permit either Party to determine if, due to lack of transmission capacity, it must refuse a transmission reservation in order to avoid potential overloading of facilities.
Appears in 3 contracts
Sources: Joint Operating Agreement, Joint Operating Agreement, Joint Operating Agreement