Transient stability based dynamic security assessment indices

Figures & data

Figure 1. Dynamic response of a machine state variable.

Table 1. DSA indices for most and least critical lines

Transmission line	Transmission line number	Normalized DSVI	Normalized ASVI	Normalized AI
7–13	24	1.000	1.000	1.000
12–13	23	0.923	0.925	0.950
6–12	10	0.735	0.739	0.846
11–41	52	0.003	0.005	0.012
14–15	27	0.001	0.003	0.007
15–45	56	0.000	0.000	0.000

Figure 2. DSVI and AI indices comparison for all contingencies.

Figure 3. ASVI and AI indices comparison for all contingencies.

Figure 4. DSVI(t) for the most critical scenario.

Figure 5. DSVI(t) for the least critical scenario.

Figure 6. ASVI(t) for the most critical scenario.

Figure 7. ASVI(t) for the least critical scenario.

Figure 8. Machine rotor angle dynamic response for the most critical scenario.

Figure 9. Machine rotor angle dynamic response for the least critical scenario.

Figure 10. Frequency dynamic response for the most critical scenario.

Figure 11. Frequency dynamic response for the least critical scenario.

Figure 12. Machine Bus voltage magnitude dynamic response for the most critical scenario.

Figure 13. Machine Bus voltage magnitude dynamic response for the least critical scenario.

Figure 14 Machine Bus angle dynamic response for the most critical scenario.

Figure 15. Machine Bus angle dynamic response for the least critical scenario.