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Fig. 6. Line Flow Sensitivity Factor for 33-bus Indian network
After placing TCSC in line-2, it has been found from optimization
algorithm that for optimal setting of TCSC control parameter at 0.00419
pu, the congestion from the system is managed effectively. For this
setting of TCSC, the power flow results are shown in Table 5 which
illustrates that the power flow in line-18, which was earlier congested,
is within its limit. The performance of the proposed algorithm is also
analyzed by placing TCSC to other potential locations i.e. line-3 and
line-6. It has been found that for control parameter setting of TCSC at
0.00250 pu and 0.00347 pu respectively for these two locations of TCSC
placement, the congestion is effectively alleviated from the system
which can also be observed from power flow results shown in Table 5. The
percentage line loading for the considered potential locations of TCSC
is illustrated in Fig. 7 which shows that placement of TCSC at these
locations alleviates the system congestion.
The cost-benefit analysis for these potential locations of TCSC
placement has been performed and the results are given in Table 6 from
which it can be observed that placement of TCSC in line-2 gives its
minimum installation cost as well as minimum generation cost of the
system.
Table 5 Power flow in congested line of 33-bus Indian network
for different locations of TCSC