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.
Identify the lowest allowable System voltage limit; Address the use of common System voltage limits between the Reliability Coordinator and the Transmission Operators in its Reliability Coordinator Area; and, Address coordination of System voltage limits between adjacent Transmission Operators in its Reliability Coordinator Area. BES performance with regard to certain prescribed conditions (pre-Contingency state, following certain identified and remain within their thermal and voltage limits. [Proposed definitions of SOL and SOL Exceedance and Requirement R3 carry this forward.] FAC-011-3 Requirement R1- RC SOL Methodology must state that SOLs shall not exceed associated Facility Ratings. [Proposed Part 3.1 carries this forward.] Parts 3.2-3.6 were not clearly identified in the previous FAC standards; these are “new” requirements added by the SDT to provide clarity regarding steady-state system voltage limits. Question 5: Do you agree that the TOP should establish the System voltage limits pursuant to the RC SOL Methodology, and that the proposed Requirement R3 provides sufficient clarity for what the RC SOL Methodology must include? Yes No Comments: Question 6: Is it clear what System voltage limits are? Does a definition for “System Voltage Limits” need to be created? A draft definition under consideration by the SDT is “System Voltage Limits: The maximum and minimum steady-state voltages (both Normal and Emergency) Contingencies)