Optimal Location of Thyristor Controlled Series Capacitor for reduction of Transmission Line losses using BAT Search Algorithm

This paper presents a new metaheuristic algorithm called BAT search Algorithm (BAT). The BAT search algorithm is used to solve Optimal Power Flow (OPF) problem with the Thyristor Controlled Series Capacitor (TCSC). The TCSC is used to reduce the transmission line losses and improve the voltage profile of the power system. The effectiveness of the BAT Algorithm has been tested for various bus systems like 5 bus test system, the IEEE 14 bus system and the modified IEEE 30 bus system. The obtained results were compared with Genetic Algorithm (GA) and Differential Evolution (DE) with and without TCSC. Results clearly indicate the effectiveness of the BAT Algorithm over the Genetic algorithm and the Differential Evolution algorithms in solving OPF problem with the TCSC. Key-Words: BAT Algorithm, Differential Evolution, FACTS device, Genetic Algorithm, Optimal Power Flow, TCSC. Nomenclature : Complex voltage at bus i; : Difference between and : Objective function : Bus voltage at i bus : Minimum voltage at bus i : Maximum voltage at bus i : Minimum real power generation of bus i : Maximum real power generation of bus i : Minimum reactive power generation of bus i :Maximum reactive power generation of bus i : Apparent power flow from bus i to j : Active power flow from bus i to j : Reactive power flow from bus i to j : Admittance of the element between bus i and j : Line impedance : Line reactance : Reactance of the TCSC : Active power losses : The active power demand at bus i : Real power generation of bus i : Number of generator buses : Number of buses