THE PRIMARY OBJECTIVE OF THIS PROPOSED DEMONSTRATION PROJECT IS TO ESTABLISH AND COMPLETE THE COLLABORATIVE ANCILLARY SERVICE ACCELERATOR FOR RENEWABLES (CASAR) PILOT PROGRAM TO SUPPORT THE ELECTRIC INDUSTRY TO REALIZE SIGNIFICANT RENEWABLE TARGETS AND A NET-ZERO CARBON ELECTRICITY SECTOR. THROUGH THE CASAR PILOT PROGRAM, THE PROJECT TEAM WILL ENGAGE A DIVERSE SET OF STAKEHOLDERS TO DEVELOP AND EXECUTE A COLLABORATIVE PILOT PROGRAM TO UNDERSTAND THE FEASIBILITY, VIABILITY, PERFORMANCE, AND ECONOMICS OF PROVIDING ANCILLARY SERVICES FOR THE BULK POWER SYSTEM WITH RENEWABLE ENERGY RESOURCES. THE PROJECT TEAM WILL ENGAGE WITH INDUSTRY STAKEHOLDERS IN THE DESIGN, IMPLEMENTATION, AND DEMONSTRATION OF MULTI-LEVEL CONTROL ARCHITECTURES TO SUPPORT ANCILLARY SERVICES FROM WIND AND SOLAR INVERTER BASED RESOURCES (IBRS). THIS RESEARCH WILL DEMONSTRATE THE CAPABILITY OF THESE TECHNOLOGIES TO PROVIDE A COLLECTION OF BULK SYSTEM ANCILLARY SERVICES RELIABLY, INSTILLING THE CONFIDENCE NEEDED FROM SYSTEM OPERATORS, WHILE ALSO DOING SO COST EFFECTIVELY INCLUDING DURING TIMES WHERE THE SERVICE QUANTITY WOULD OTHERWISE BE DEFICIENT. EPRI WILL WORK TOGETHER WITH THE PROJECT TEAM AND INDUSTRY STAKEHOLDERS TO DESIGN A PILOT PROGRAM THAT WILL ENABLE MULTIPLE DEMONSTRATION SITES OVER A 6-12 MONTH PERIOD THAT WILL PERMIT ALL ENTITIES TO WITNESS THE BENEFITS OF PROVISIONING OF THESE SERVICES BY WIND AND SOLAR AND DETERMINE MODIFICATIONS TO ENABLE THE EVENTUAL FULL PARTICIPATION WITH FORMAL AGREEMENTS BETWEEN PROVIDERS AND OPERATORS AND TARIFF MODIFICATIONS THAT ALLOW FOR PARTICIPATION OF THESE RESOURCES WITHIN ANCILLARY SERVICE MARKETS.