Implementation of Static Line Voltage Stability Indices for Improved Static Voltage Stability Margin

Table 3

System performance of the IEEE 118-bus test system.

	Objective functions
	Case 1	Case 2	Case 3	Case 4
Pg (MW)	4,317.40	4,312.46	4,317.68	4,310.57
Qg (MVar)	249.98	167.77	232.22	183.09
Loss (MW)	67.88	58.94	64.35	65.16
Cost ($/h)	144,225.06	150,129.63	155,450.07	149,882.80
Maximum FVSI	0.3913	0.2600	0.2750	0.3068
Maximum Lmn	0.3980	0.2670	0.2861	0.3514
Maximum LVSI	1.0000	0.9878	0.9834	0.9982
Sum FVSI	11.3469	10.6039	8.7766	9.2529
Sum Lmn	11.5817	10.8010	8.9422	9.4803
Sum LVSI	58.6067	54.7991	54.6839	58.3085
Maximum loadability (MW)	20,906.84	23,101.25	21,964.12	21,139.85