1. 1 MSRATF Update to TSS (Modeling SPS and RAS Ad Hoc Task Force) Activities August, 2014 Joe Seabrook Puget Sound Energy, Inc.

2. 2 MSRATF Guiding Principles ♣Transparency on transmission reliability matters Transparency Between Systems ♣Existing and future facilities modeled in WECC planning cases will include Relays, RAS, Contingency Definitions, Node-Breaker Topology, and Sequence Components Needed to evaluate existing and planned facilities Assumptions can be made for future facilities ♣This data will be provided and maintained by the sanctionable entity; TO, TP, PC, TOP ♣Include the means to exchange this data between simulation programs

3. 3 RAS Subgroup Thong Trinh Generic RAS model - common format –Implemented in PowerWorld last fall –GE/WECC contract to implement in 3 phases To provide Phase 1 by the end of the 2014 (RAS) –Seeking funding for Siemens-PTI work Would take Siemens-PTI about 6 months –Thong and Eleanor Ewry have completed testing the PowerWorld implementation PowerWorld is developing an improvement that will be a change in the specification

4. 4 RAS Subgroup Others TSS is requesting members to provide their RAS descriptions and models - Tracy Colstrip Northwest Energy sent a draft ATR specification to the vendors to evaluate PAC is developing Bridger RAS model with WECC common format in PowerWorld BC Hydro is working with PowerWorld to evaluate using the WECC common format

5. 5 Relays Subgroup Amos Ang Differential relay model specification –Specification approved by MVWG in June –Is triggered off the contingency description, not unbalanced line flows –Node Breaker is required for bus differential TSS Motion: Approve Differential Relay Specification (include Ignore switch).

6. 6 Relays Subgroup Amos Ang Amos discussed generic generator relay models at MVWG –Would develop a generic specification for GP1 and GP2, with improvements to GP2 Want to validate distance relays with a test case Zero sequence relays –Inverse time directional over-current

7. 7 Node Breaker Subgroup Jonathan Young Paper on “Reconciliation of BCCS and WSM with Integrative Node-Breaker Method” –Obtained MSRATF consensus approval –Seeking TSS approval by email in November Facility owners model and maintain their own equipment (sanctionable entity) –TO, GO, TOP, TP, PC

8. 8 Node Breaker Subgroup Jonathan Young Buses are called Topological Nodes Called “subnet” objects in PowerWorld Connections of branches are called Connectivity Nodes –A Connectivity Node can belong to 0 or 1 Topological Node

9. 9 Node Breaker Subgroup Jonathan Young

10. Modeling Unbalanced Networks Motion passed to include unbalanced sequence network data in WECC base cases. –SRWG has been asked to develop a plan to include the sequence data in base cases Should we do a workshop to gather and maintain sequence and relay data with automated means. –Explanation of No votes was distributed to TSS by e-mail from PAC, BPA & TSG. Follow up discussion was via email 10