to be used in operations. The method incorporate these ratings into their tools and processes methodology for developing Facility shall address the use of common Facility and use the ratings in establishing their SOLs. Because Ratings. Ratings between the Reliability TOs and GOs are not required to use any sort of FAC-008-3 Requirement R6– GOs and Coordinator and the Transmission continent-wide methodology for establishing the Facility TOs shall establish Facility Ratings Operators in its Reliability Coordinator Ratings, it is possible for owners to use varying/different consistent with its methodology. Area. methodologies. This can create problems in establishing FAC-008-3 Requirements R7 and R8– the appropriate SOL because the variations in Facility must provide their Facility Ratings to the Rating methodologies may result in different or RC, TOP and other functional entities. inconsistent types of Facility Ratings used in operations. Mapping to existing FAC standards If the RCs and TOPs are using different sets of Facility under revision: Ratings in conducting their respective outage FAC-011-3 Requirement R1- RC SOL coordination studies, OPAs, and RTAs, this may create a Methodology must state that SOLs shall potential risk to reliability. not exceed associated Facility Ratings. FAC-011-3 Requirement R2 (Parts 2.1 The intent of Requirement R2 is for the RC SOL and 2.2)- RC SOL Methodology shall Methodology to identify the method that its TOPs will use include requirement that SOLs provide in determining which of the Facility Ratings provided by BES performance, and following certain the owner (under FAC-008-3) are appropriate for use in prescribed conditions/states, remain establishing SOLs for use in operations. As outlined within their Facility Ratings. above, under the revised definition of SOL, the Facility Ratings will be the SOL. The second sentence of Requirement R2 is intended to ensure that the RC and the TOP are using the same Facility Ratings, which will eliminate the risk identified above.
to be used in operations. The method shall address the use of common Facility Ratings between the Reliability Coordinator and the Transmission Operators in its Reliability Coordinator Area. incorporate these ratings into their tools and processes and use the ratings in establishing their SOLs. Because TOs and GOs are not required to use any sort of continent-wide methodology for establishing the Facility Ratings, it is possible for owners to use varying/different methodologies. This can create problems in establishing the appropriate SOL because the variations in Facility Rating methodologies may result in different or inconsistent types of Facility Ratings used in operations. If the RCs and TOPs are using different sets of Facility Ratings in conducting their respective outage coordination studies, OPAs, and RTAs, this may create a potential risk to reliability. The intent of Requirement R2 is for the RC SOL Methodology to identify the method that its TOPs will use in determining which of the Facility Ratings provided by the owner (under FAC-008-3) are appropriate for use in establishing SOLs for use in operations. As outlined above, under the revised definition of SOL, the Facility Ratings will be the SOL. The second sentence of Requirement R2 is intended to ensure that the RC and the TOP are using the same Facility Ratings, which will eliminate the risk identified above. methodology for developing Facility Ratings. FAC-008-3 Requirement R6– GOs and TOs shall establish Facility Ratings consistent with its methodology. FAC-008-3 Requirements R7 and R8– must provide their Facility Ratings to the RC, TOP and other functional entities. Mapping to existing FAC standards under revision: FAC-011-3 Requirement R1- RC SOL Methodology must state that SOLs shall not exceed associated Facility Ratings. FAC-011-3 Requirement R2 (Parts 2.1 and 2.2)- RC SOL Methodology shall include requirement that SOLs provide BES performance, and following certain prescribed conditions/states, remain within their Facility Ratings.
2015-09_FAC-011-4%20-%20Comment%20Form%20Questions.docx