Key Transmission Section Search Based on Graph Theory and PMU Data for Vulnerable Line Identification in Power System

Table 7

IEEE 14-bus system vulnerable lines and its transmission section.

Sort	Prebreak branch	Corresponding section	LOPF	Safety margin
1	2-3	2–4	0.776	0.428
		2–5	0.895	0.439
2	4–7	4–9	0.668	0.883
		9-10	0.215	0.725
3	3-4	2-3	0.492	0.716
4	2–4	5-4	0.618	0.362
		2-3	0.492	0.716
5	5-4	2–4	0.776	0.428
		2-3	0.492	0.716
		1–5	0.526	0.625