ERCOT’s Technical Advisory Committee canceled its scheduled June 30 meeting but held an email vote to unanimously approve a nodal operating guide revision request removing references to the provision of responsive reserves across DC ties.

NOGRR 156 became effective July 1.

The operating guides have included the references to responsive reserves — operating reserves ERCOT maintains to restore system frequency within the first few minutes of an event that causes a significant deviation — since at least 1997. Staff said there are no systems or procedures in place to award ancillary services to the DC ties, and no project to add this functionality has ever been proposed.

Staff said that without any funding for the necessary system changes, ERCOT has no mechanism for allowing the provision of responsive reserves over the DC ties.

─ Tom Kleckner