STATCOM(Static Synchronous Series Compensator) is a shunt connected reactive power compensation FACTS device. It can also be used to regulate active power if batteries are provided. It has faster rate of generation/ absorption of reactive power so as to maintain bus voltage. Generally, it consists of a coupling transformer, a voltage source inverter and a dc side capacitor. The optimal location of STATCOM is based on location of minimum power loss in the line and installation cost of STATCOM. The methodology is mathematically formulated based on installation cost of STATCOM and power loss in the line. The ability of STATCOM to provide shunt compensation in order to maintain bus voltage is exploited here.The criteria for optimal placement are following,
1.Installation cost of STATCOM &
2.Power losses in lines.
    Thyristor-Controlled Series Compensation (TCSC) is used in power systems to dynamically control the reactance of a transmission line in order to provide sufficient load compensation.  The benefits of TCSC are seen in its ability to control the amount of compensation of a transmission line, and in its ability to operate in different modes. These traits are very desirable  since loads are constantly changing and cannot always be predicted. TCSC designs operate in the same way as Fixed Series Compensation, but provide variable control of the reactance absorbed by the capacitor device.

    The main objective of this work is to determine the optimal location and the optimal parameter setting of the TCSC combined with SATCOM in the power network to minimize the loss of the power system and compare their performances. The design uses three optimization algorithm i.e. Gravitational Search Algorithm (GSA),Grey Wolf Algorithm(GWA) and Firefly Algorithm(FA). To show the validity of the proposed techniques and for comparison purposes, simulations are carried out on IEEE-57 bus power system. The results are presented in the simulation video demo as given below.

Reference Paper-1: Optimal location of FACTS device using Meta Heuristic Search Algorithm
Author’s Name: A. S. Siddiqui, Tanmoy Deb, and Fahad Iqbal
Source: IEEE
Year:2015
Reference Paper-2: Power Flow Analysis of Simulink IEEE 57 Bus Test System Model using PSAT
Author’s Name: R. Anand and V. Balaji
Source: Indian Journal of Science and Technology
Year:2015
Reference Paper-3: Optimal Location and Parameter Setting of TCSC for Loss Minimization Based on Differential Evolution and Genetic Algorithm
Author’s Name: Ghamgeen I. Rashed ,Yuanzhang Sun and, H. I. Shaheen
Source: Elsevier
Year:2012
Reference Paper-4: An Improved Grey Wolf Optimizer Based on Differential Evolution and Elimination Mechanism
Author’s Name: Jie-Sheng Wang and Shu-Xia Li
Source: Scientific Reports
Year:2019
Reference Paper-5: Optimal Allocation of Multiple Distributed Generators in Distribution System using Firefly Algorithm
Author’s Name: Sureshkumar Sudabattula and Kowsalya M
Source: Journal of Electrical Engineering
Year:2017
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