Context: Scenario Studies Michael Bailey, Senior Staff Engineer – System Adequacy Planning Western Electricity Coordinating Council

Western Electricity Coordinating Council What Is WECC’s Mission? The Western Electricity Coordinating Council (WECC) is a non-profit corporation that exists to assure a reliable Bulk Electric System in the geographic area known as the Western Interconnection Western Electricity Coordinating Council

Western Electricity Coordinating Council What Is WECC’s Mission? The Western Electricity Coordinating Council (WECC) is a non-profit corporation that exists to assure a reliable Bulk Electric System in the geographic area known as the Western Interconnection Western Electricity Coordinating Council

Reliability Questions Adequacy? Operations? Infrastructure? Stability? Policy? Market Forces? Expectations? Economics? Risks? Drivers? Western Electricity Coordinating Council

Main Modeling Categories Load Profiles Generation Resources Transmission Infrastructure Economics Western Electricity Coordinating Council

Western Electricity Coordinating Council Study Horizons Near Term (Present to 5 years) Mid Term (5 to 10 Years) Long Term (10 to 20 Years) Western Electricity Coordinating Council

WECC Reliability Studies and Data Sets Dynamic and Steady State Power Flow Situational Awareness and Event Analysis Issue based studies Scenario-based studies Study Requests Sensitivity studies Assumptions Data Mining and Data Sets Western Electricity Coordinating Council

Tool-Driven Approach to Studies Historic Study Approach Old Way Design Studies to fit available tools Western Electricity Coordinating Council

Strategic Approach to Studies Plausible Questions that build on scenarios Portfolio of Tools and Skill Sets A B X Z Y Select ideal tools and skill sets to consider Reliability Risks and Issues Western Electricity Coordinating Council

Tools and Partnerships Production Cost Power Flow Capital Cost Stochastics Predictive Analytics Skills & Expertise Geospatial Consultants National Labs Stakeholders Other . . . Western Electricity Coordinating Council

Western Electricity Coordinating Council Contact Michael Bailey Senior Staff Engineer System Adequacy Planning mbailey@wecc.biz Western Electricity Coordinating Council