N − 1 Security Criteria Based Integrated Deterministic and Probabilistic Framework for Composite Power System Reliability

Table 2

Categorization of contingent transmission lines based on SSI.

Range	Category
SSI ≥ 0.8	Most critical (MC)
0.3 ≤ SSI < 0.8	Critical (C)
SSI < 0.3	Not critical (NC)