“…Minimizing the PMUs and maximizing the measurement redundancy lead the majority of researchers dealing with the PMU optimal placement as an optimization problem [ 1 , 3 , 4 , 5 , 6 , 7 , 8 ]. Therefore, the optimization problem of PMU placement is usually solved by the mathematical (conventional) techniques or the evolutionary (heuristic) algorithms [ 1 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ].…”