IJISET - International Journal of Innovative Science, Engineering & Technology, Vol. 8 Issue 2, February 2021 ISSN (Online) 2348 – 7968 | Impact Factor (2020) – 6.72 www.ijiset.com 153 Application of Metaheuristic Algorithms for Optimal Power Flow Solutions with SSSC Device 1 Yeshitela Shiferaw Maru, 2 K. Padma 1,2 Andhra University, college of Engineering (A), Electrical Engineering department 1 Email: yeshitela2010@gmail.com, padma315@gmail.com Abstract: -The optimal power flow problem is an optimization tool that applied for obtaining the best operating point (control variables) for given objective functions with satisfying the system equality and inequality constraints. The Flexible Alternating Current Transmission Systems devices have been widely used in electrical power systems networks connected on the transmission line or the bus. Hence, the SSSC controller is a useful FACTS device based on voltage source converter. It can inject a controllable voltage within the given limits in series with a transmission line to control the active and reactive power flow through the transmission line. In this paper, the optimal power flow solution without and with SSSC FACTS device was discussed. The algorithm to solve the OPF problems is proposed Multi Population-based Modified Jaya (MPMJ) algorithm and compared with TLBO and JAYA algorithms. The optimal location of the SSSC device is determined using the Analytical Hierarchy Process (AHP) method. Therefore, the proposed MPMJ optimization algorithm applied with SSSC device for optimal values of total fuel cost of generation, real power loss, the total voltage deviation, and the sum of squared voltage stability index on the standard IEEE-57 bus test systems. The results obtained by the proposed MPMJ algorithm are better solutions effectively in the presence of the SSSC device than the recent algorithm reported in the literature. Index terms: -Analytical Hierarchy Process, Fuel cost of generation, Multi-Population based Modified Jaya algorithm, Optimal power flows 1. Introduction The electric power system classified power generating stations, transmission & distribution systems, and substations with transformers & circuit breakers. The electrical system is complicated and spread over large geographical areas. The transmission line connects the generation station with substation or connecting substation to concerned loads, which is the central part of power system components. Figure 1 shows the power system components structure from the generation station to the load through the transmission line and compensating FACTS device. The generating station consists of the prime mover, generator, and energy sources. The prime mover includes gas turbines, steam engines, etc. The energy sources may consist of coal, the oil burned in the furnace to heat water, steam in the boiler, hydropower, geothermal, solar energy, wind energy, etc. The transmission line is connecting between the generating station to the substation through the transformer and FACTS devices. A distribution system connects all the individual loads in a specified area to the transmission lines, through transformers and load wires. FACTS devices work by supplying or absorbing reactive power, increasing or decreasing voltage, and regulating series impedance of transmission lines or phase angle [1]. On the other hand, FACTS devices represent a useful device used to improve the overall power system network performances by controlling power flow through transmission lines and voltage profile. These devices are introduced in the OPF problem for various objectives, such as reducing total fuel cost, active power loss, the sum of voltage deviation, and enhancing the voltage stability index [1].