Transient stability improvement using Non-superconducting Fault Current Limiter

In this paper, transient stability of Single Machine Infinite Bus (SMIB) system with a Non-superconducting Fault Current Limiter (NSFCL) is proposed. Analytic analysis of system stability is discussed in detail and as result, optimal value of NSFCL resistance during fault that leads to effective improvement of stability is calculated. Equal area criterion is used for this calculation. Study system is simulated by EMTDC/PSCAD to verify the effectiveness of the optimal resistor value of the proposed NSFCL.