Posting for Open Process Review of PRC-006-NPCC-2 Automatic Underfrequency Load Shedding

The clean and redlined versions of the revised NPCC Regional Standard PRC-006-NPCC-2 Automatic Underfrequency Load Shedding, have been posted on the NPCC Website for a 45-day comment period through May 31, 2018, along with a proposed Implementation Plan and Mapping document.

This draft has been developed in accordance with the NPCC Regional Standard Process Manual (RSPM) and within the scope of an NPCC Regional Standard Authorization Request, which was accepted by the NPCC Regional Standard Committee (RSC). The revisions are also presented as mandated by the NERC Rules of Procedure.

Among the proposed changes included in the updated draft version of the Standard are:

• Modifications to Figures #1 and #2 in the Standard

• Added a Guidelines and Technical Basis section (NERC may request us to create a separate document for this section and post it with the standard subsequent to approvals)

• Incorporated certain Criteria attributes from Directory #12 Automatic UFLS Program Requirements which will facilitate the retirement of Directory #12

• Additional clarification of requirement language

• Proposed retirements of some of the Requirements that are redundant to the PRC-006-2 Continent-wide NERC standard

Also posted is a set of questions developed by the Regional Standard Drafting Team to solicit comments on the draft standard and associated draft Implementation Plan for the Regional Standard. Included in these questions is one on cost effectiveness of the requirements.

See the attachment for more details.