A Gravitational Search Algorithm Based Static VAR Compensator Switching Function Optimization Technique for Minimum Harmonic Injection

FFANN Optimization by ABC for Controlling a 2nd Order SISO System’s Output with a Desired Settling Time

“…Worker bees compare ρ re f that are randomly selected and used as threshold value with ρ i . If the probability of selecting ρ i is larger than ρ re f onlooker bee is moved toward this source of food and starts searching for a new solution by rerunning Equation (8).…”

“…The variables in Equations (8)- 10are NS: Number of food sources D: Number of parameters that are optimized x max , x min : Limit values of parameters that will be optimized v i : New food location in relation to x i x k : Randomly food location that is different from x i ϕ i,j : Random value between −1 to 1 f it i : Normalized cost function k: Solution in the neighborhood of i All worker and onlooker bees check the abandonment counter for each solution after completing of food searching. If counter value reaches to limit value, the worker bee turns into a scout bee and run Equation (8). The process steps continue until the maximum number of cycles or the lowest value of the cost function value is reached.…”

“…In the last two decades, researchers have developed different types of optimization algorithms that may be used by scientists in control area. Bee [1], Firefly [2], Bat [3], Virus [4], Genetic [5], Cuckoo [6], Particle Swarm [7], Gravitation [8] and Biogeography [9] may be given for example.…”

Tuned‐TSC based SVC for reactive power compensation and harmonic reduction in unbalanced distribution system

“…where n = 4i ± 1 i = 1, 2, 3, … In (38), the coefficient K 1 needs to have larger value than K 3 to K n for giving more importance to maintain fundamental component, at the same time K 3 to K n are adjusted to descending order such that more priority is given to reduce lower order harmonics. Moreover, all the coefficients need to be properly adjusted so that GSA can perform non-biased optimisation.…”

“…However, these schemes need additional investment [37] and space to accommodate filtering stages. Thus, improvement of switching schemes of SVC is also studied to minimise harmonics generated by TCR without using additional filter [38][39][40][41]. However, these switching schemes are insufficient to a wider range of TCR harmonics as well as harmonics generated by non-linear load.…”