RELIABLE PROTECTION FOR AN INVERTER-BASED RESOURCES DOMINANT GRID: TECHNOLOGY DEVELOPMENT AND FIELD DEMONSTRATION A. PROJECT OBJECTIVES THE KEY PROJECT OBJECTIVES ARE AS FOLLOWS: (1) ASSESS GAPS IN COMMONLY USED SHORT CIRCUIT SIMULATION SOFTWARE AND OUTLINE A FUTURE DEVELOPMENT ROADMAP TO COMMUNICATE TO SOFTWARE VENDORS. (2) DEVELOP A TIME DOMAIN ELECTRICAL-MECHANICAL TRANSIENT (EMT) CO-SIMULATION FRAMEWORK TO ANALYZE SYSTEM FAULT SIGNATURES IN HIGH INVERTER-BASED RESOURCE (IBR) SCENARIOS AS WELL AS INTERACTIONS BETWEEN SYSTEM PROTECTION AND IBR PROTECTION. (3) DEVELOP A STABILITY ANALYSIS SOFTWARE TOOL THAT CAN ASSESS STABILITY THROUGHOUT A FAULT USING POWER SYSTEM PROTECTION AND IBR CONTROL LOGIC AND CALCULATE CRITICAL FAULT CLEARING TIME AND STABILITY MARGIN UNDER VARIOUS IBR PENETRATION LEVELS. (4) ASSESS THE IMPACT OF HIGH IBR PENETRATION ON TRANSMISSION PROTECTION SYSTEMS AND COMMUNICATE EFFECTIVE IBR STUDY TOOLS AND OPERATIONAL IMPACTS TO UTILITIES’ ENGINEERING SUPPORT AND OPERATIONS GROUPS. (5) DEVELOP AND DEMONSTRATE NEW AND PRACTICAL PROTECTION SCHEMES THAT ENABLE SAFE AND RELIABLE GRID OPERATION WITH UP TO 100% IBR GENERATION. (6) DEVELOP A COMMERCIALIZATION AND IMPLEMENTATION ROADMAP FOR DEVELOPED PROTECTION TECHNOLOGIES.