# Online Static Security Assessment of Power Systems Based on Lasso Algorithm
## 5 Case Studies
### IEEE 300-Bus System
#### 5.3.1 Base Load Conditions
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Outage Line** & **NRLF** & **MSA-Lasso** & **Relative Error (\%)** \\ \hline L 181(119–120) & 284.1077 & 283.5923 & \(-0.1814\) \\ L 309(225–191) & 50.4040 & 50.5872 & 0.3635 \\ L 114(59–61) & 19.5083 & 19.5364 & 0.1436 \\ L 242(162–164) & 17.2150 & 17.2048 & \(-0.0592\) \\ L 257(178–180) & 6.7417 & 6.7493 & 0.1133 \\ L 322(241–237) & 6.7152 & 6.7214 & 0.0917 \\ L 246(167–169) & 3.1995 & 3.2130 & 0.4206 \\ L 205(133–137) & 1.2821 & 1.2851 & 0.2337 \\ L 100(906–9007) & 1.1665 & 1.1688 & 0.1944 \\ L 591(164–2) & 1.1353 & 1.1391 & 0.3343 \\ L 249(173–174) & 1.0834 & 1.0789 & \(-0.4179\) \\ L 210(134–184) & 1.0549 & 1.0556 & 0.0670 \\ L 174(115–122) & 0.8585 & 0.8621 & 0.4129 \\ L 273(194–664) & 0.4088 & 0.4089 & 0.0342 \\ L 207(133–169) & 0.3709 & 0.3695 & \(-0.3729\) \\ L 308(224–226) & 0.3678 & 0.3681 & 0.0611 \\ L 275(196–197) & 0.1832 & 0.1828 & \(-0.2299\) \\ L 86(38–41) & 0.1707 & 0.1707 & \(-0.0462\) \\ L 323(240–281) & 0.1479 & 0.1474 & \(-0.3416\) \\ L 140(51–194) & 0.1469 & 0.1465 & \(-0.3172\) \\ L 266(190–231) & 0.1356 & 0.1359 & 0.2660 \\ L 85(37–90) & 0.1340 & 0.1337 & \(-0.2068\) \\ L 143(86–87) & 0.1338 & 0.1338 & 0.0051 \\ L 9(9005–9055) & 0.1330 & 0.1330 & 0.0251 \\ L 142(85–86) & 0.1276 & 0.1270 & \(-0.4102\) \\ L 274(195–219) & 0.1240 & 0.1244 & 0.3311 \\ L 192(136–158) & 0.1217 & 0.1217 & \(-0.0293\) \\ L 227(143–145) & 0.1206 & 0.1211 & 0.4201 \\ L 185(123–124) & 0.0989 & 0.0990 & 0.0652 \\ L 159(99–109) & 0.0881 & 0.0884 & 0.3287 \\ L 197(128–130) & 0.0819 & 0.0817 & \(-0.2183\) \\ L 184(122–125) & 0.0783 & 0.0780 & \(-0.3255\) \\ L 163(103–105) & 0.0782 & 0.0780 & \(-0.2962\) \\ L 162(102–104) & 0.0737 & 0.0734 & \(-0.3757\) \\ L 239(157–159) & 0.0726 & 0.0724 & \(-0.2540\) \\ L 324(242–245) & 0.0671 & 0.0673 & 0.3236 \\ L 128(73–79) & 0.0663 & 0.0665 & 0.2394 \\ L 541(13–20) & 0.0654 & 0.0656 & 0.3786 \\ L 112(57–63) & 0.0645 & 0.0643 & \(-0.3573\) \\ L 251(173–176) & 0.0641 & 0.0639 & \(-0.3667\) \\ L 201(130–132) & 0.0632 & 0.0634 & 0.4178 \\ L 65(22–23) & 0.0619 & 0.0620 & 0.0239 \\ L 314(228–234) & 0.0614 & 0.0616 & 0.2539 \\ L 248(172–174) & 0.0613 & 0.0612 & \(-0.1593\) \\ L 215(137–181) & 0.0611 & 0.0610 & \(-0.3247\) \\ L 256(178–179) & 0.0610 & 0.0611 & \(-0.0074\) \\ L 295(214–242) & 0.0608 & 0.0608 & \(-0.0681\) \\ L 315(229–190) & 0.0604 & 0.0606 & 0.3647 \\ L 340(10–11) & 0.0599 & 0.0598 & \(-0.2893\) \\ L 221(140–145) & 0.0596 & 0.0594 & \(-0.2511\) \\ L 121(69–79) & 0.0593 & 0.0591 & \(-0.2974\) \\ L 222(140–146) & 0.0588 & 0.0591 & 0.4009 \\ L 14(9012–9002) & 0.0526 & 0.0527 & 0.2202 \\ L 335(3–1) & 0.0477 & 0.0476 & \(-0.2486\) \\ L 487(713) & 0.0466 & 0.0467 & 0.1484 \\ L 80(37–38) & 0.0322 & 0.0322 & \(-0.2373\) \\ L 7900(5–9053) & 0.0289 & 0.0288 & \(-0.0387\) \\ L 21(9007–9071) & 0.0073 & 0.0074 & 0.3859 \\ L 34(9003–9036) & 0.0073 & 0.0073 & 0.0760 \\ L 118(63–526) & 0.0052 & 0.0052 & \(-0.2994\) \\ \hline \hline \end{tabular}
\end{table} 
Table 15: Security index results of two methods in the base load condition of the IEEE 300-bus system.