5.1 IEEE 30-bus system
The data for IEEE 30-bus system has been taken from [40]. The load flow solution for IEEE 30 bus system is given in Table 5 which shows that that line-1 (connected between bus 1 and 2) is congested. The power flow through this line is 1.010 pu. The line flow sensitivity factor with respect to TCSC control parameter has been computed for the congested line and is shown in Table 1.
From Table 1, it is observed that line-2, line-3 and line-6 (connected between bus-1and bus-3, bus 2 and bus-4, bus-2 and bus-6 respectively) have high negative values of line flow sensitivity factor as compared to other lines which can also be inferred from Fig. 4. Therefore these lines have high priority for placement of TCSC in order to mitigate congestion. Line-2, having the highest negative value of sensitivity factor, is selected for placement of TCSC to manage congestion.
Table 1 Line flow sensitivity factor of IEEE 30-bus system for congested line-1