NERC Field Trial ERCOT Time Error Correction

Balancing Authority Control Standards Drafting Team (BACSDT) Pursuing the option to eliminate Time Error Correction (TEC) as a reliability standard defined in BAL Completed Industry Survey TEC paper covering the history and reasons to remove/keep TEC went out with the Survey Initiating Field Trial to reduce TEC offset from 20 to 10mHz (Eastern Interconnect) Initiating Field Trial to NOT perform Time Error Correction (ERCOT)

Balance Authority Control SDT Tasks Address the following: FERC Order 693” applies to NERC standards BAL-002, 004, 005, and 006  Time Error Correction  special Area Control Error cases  Inadvertent Interchange  reliability requirements/business practices with NERC and NAESB collaborative participation

Field Trial in ERCOT Have: 1.Written verification from NERC that ERCOT ISO will not be in violation of NERC standards Need: 1.Need Stakeholder support of OGR to modify TEC requirement 2.Written verification from TRE that ERCOT will not be in violation of the Protocols and OG’s

OGRR219 Section 1.5, Time Error Monitoring Modify the last sentence by removing the following text: ‘however, at no time should the accumulated time error be allowed to exceed five (5) seconds.’