Status: 

The standard and implementation plan and approved the VRFs and VSLs were approved by the NERC Board of Trustees on March 10, 2011.

Background:

As the ERO, NERC must address all directives in Orders issued by FERC.  On March 18, 2010 FERC issued Order No. 733 which approved Reliability Standard PRC-023-1 – Transmission Relay Loadability, and also directed NERC, as the Electric Reliability Organization (“ERO”), to develop certain modifications to the PRC-023-1 standard through its Reliability Standards development process, to be completed by specific deadlines. Attachment 1 to the SAR contains the directives and associated deadlines. The Order also directed development of two new Reliability Standards to address issues related to generator relay loadability and the operation of protective relays due to power swings. The standards-related directives in Order 733 are aimed at closing some reliability-related gaps in the scope of PRC-023-1.

This SAR’s scope includes three standard development phases to address the standards-related directives in Order No. 733 directives. Phase I is focused on making the specific modifications to PRC-023-1 that were identified in the order; Phase II is focused on developing a new standard to address generator relay loadability; and Phase III is focused on developing requirements that address protective relay operations due to power swings.