SPS Protection in Large Thermal Power Station

System Protection Schemes (SPS) are widely accepted as an effective tool for increasing the utilization of power networks by enhancing the resilience of the power system towards rare contingencies. These schemes are considered as 2nd generation protection philosophy after the unit protection philosophy. In the last few years several SPS have been designs and implemented successfully in the Indian Power System. These paper discuss the need for SPS in TATA Mundra Power Plant outgoing line which further connected to western grid. In this paper details analysis of different SPS schemes on different condition and Fast load cut off analysis in Thermal Power Plant. Outage of such higher capacity elements is not totally avoidable and endangers the normal operation of the power system and may lead to a blackout if automatic fast suitable corrective action is not taken with the increased complexity of the power system and reduced margin, Special Protection Schemes(SPS) are to be designs and implemented to combat such eventuality.