Demonstrating the Security of New Reactor Protection Schemes

The resulting innovative protection approach, which provides optimal protection for phase-to-phase, phase-to-ground, and turn faults for different reactor applications, is demonstrated to clear turn faults within a few cycles with sensitivities in the 0.1-0.2% range. The paper also provides instrument transformer selection criteria, settings guidelines to ensure protection security during reactor energization, and a novel scheme for ensuring security during line de-energization. Security and dependability of the presented protection schemes was demonstrated by real-time simulations involving a new faulted shunt reactor model for the RTDS Simulator.