Practical experience: Resource adequacy studies in the Western interconnection

Paper presents the practical experience in evaluating adequacy of generating capacity by different regions in the Western interconnection. · It also outlines different probabilistic methodologies and tools used to calculate reliability indexes such as LOLE, EUE, etc in the Western Interconnection. · The paper made an attempt to emphases why industry today needs enhanced methodologies and tools and how to resolve some of the known obstacles. · Adequacy assessment of systems with ongoing integration of variable resources such as wind and solar is among new requirements to enhance the present methodologies and tools. · Address planning for adequate reliability under high penetration of renewable.