Validation and Tuning of Remedial Action Schemes in Indian Grid Operations Using Synchrophasor Technology

System Protection Schemes (SPSs) or Remedial Action Schemes (RASs) are considered as an effective tool and way for enhancing the reliability and resiliency of the power system toward rare contingencies. The validation of SPS is difficult by using conventional Supervisory Control and Data Acquisition (SCADA) system data due to its inherent low scan rate and skewedness. Under such condition, Synchrophasors data has been found to be better suited for performance evaluation SPS and review of its design due to high scan rate and time synchronization. This chapter describes few case studies to explain the usage of Synchrophasors for evaluation and review of SPS in the Indian Grid. It also demonstrates how grid operator has utilized the Synchrophasor data in improving the system performance under various contingencies and laid down the foundation for effective utilization of WAMS for evaluating SPS operation, modifying SPS design, and designing a new SPS.