WECC 2017 SAP Work Plan Update Technical Advisory Subcommittee 2017 Quarterly Meeting May 4, 2017 Michael Bailey, WECC Western Electricity Coordinating Council

Western Electricity Coordinating Council Guiding Principles Top Priority – Complete 2017 Study Program Stakeholder Engagement Through Current TEPPC Processes Facilitate RAC Transition for September Hand-off Implement DWG and MWG “Agreed Upon” Enhancements Complete Studies by End of September Finalize 2026 Common Case by June 30th Publish WECC 2017 ITRA by End of Year Western Electricity Coordinating Council

Western Electricity Coordinating Council DWG & MWG Enhancements TAS Steering Group given action item to develop and prioritize list of data and modeling enhancements. WECC and TAS Steering Group reviewed and identified Data and Modeling Enhancements to include in the 2026 Common Case. Solicited guidance from other subject matter experts (e.g., Xiaobo Wong, CAISO). Prioritized and vetted short term and long term enhancements. Work plan devised to implement enhancements and to complete the 2017 Study Program on schedule. Western Electricity Coordinating Council

Western Electricity Coordinating Council WECC 2017 SAP Timeline Publish 2026 Common Case v2.0 Lock Down 2026 Common Case v3.0 TEPPC Approves 2017 Study Program Complete 2017 Study Cases Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2017 Open Season Publish 2017 ITRA DWG & MWG Enhancements Study Scoping } Year-10 Studies } Review Year-20 Studies } Perform Studies 2017 ITRA Write-up, Review, & Approval Metrics Western Electricity Coordinating Council

Western Electricity Coordinating Council Questions? Michael Bailey, P.E. Senior Staff Engineer Western Electricity Coordinating Council mbailey@wecc.biz Western Electricity Coordinating Council