Advanced Method for Optimal Allocation of FACTS Devices Using Line Stability Index Combined with Meta-Heuristic Optimization Techniques

In the deregulated system, co-generators and Independent Power Producers (IPPs) are to have the right selling electric power to the existing transmission network. It leads to congestion and outage of transmission lines, stability problems, and voltage deviations. Several attempts have been performed to solve those problems through optimal allocation of FACTS devices. Most of previous studies have not provided such a technique to determine optimal number of the used FACTS controllers. These studies have supposed a definite number and the optimization technique has been provided only to determine optimal location and size. This paper introduces an advanced method to propose optimal number, location, and size of Static Var Compensator (SVC) and Unified Power Flow Controller (UPFC) using Line stability index (Lmn)and four different meta-heuristic optimization techniques. (Lmn) is provided to determine optimal number and location of the FACTS devices while Cuckoo Search (CS), Adaptive Cuckoo Search (ACS, Dragonfly Algorithm (DA), and Gravitational Search Algorithm (GSA) proposing the optimal setting and size of these FACTS devices. The proposed method is applied to IEEE-39 bus network, the power system planners, engineers, and students for optimal allocation of FACTS devices can use it.