Selection of Suitable Location of the FACTS Devices for Optimal Power Flow

Abstract — The flexible AC transmission system (FACTS) in a power system plays a vital role in improving the power system performance, both the static and dynamic, where improving the stability, reducing the losses and the cost of generation, also enhancing the system loading capability with rerouting the power flow in the network. In order to reach the above goals, these devices must be located optimally. In the proposed work, the sensitivity of system loading factor, corresponding to the real and reactive power balance equations with respect to the control parameters of FACTS, technique plus N-1 contingency criterion with some considerations that fitting with formation of the network are used to consider the location and type of the devices. Furthermore the optimal location and parameter are tested and found with the nonlinear predictor-corrector primal-dual interior-point optimal power flow (OPF) algorithm. The simulation was performed on the IEEE 30-bus, 57-bus and 118-bus power systems for steady-state studies and considering eigenvalue after addition the dynamic component. The optimization results indicate that introduction of FACTS devices in a right location increases the loadability or decreases the losses of the system where the sensitivity of system loading factor and N-1 contingency criterion can be effectively used for the selection of FACTS location