“…Hence, more time is required to reach the global solution. The computer technology has been developed many new population based heuristic optimization techniques like differential evolution (DE) [8], evolutionary programming (EP) [9], hybrid evolutionary programming (HEP) [10], particle swarm optimization (PSO) [11], civilized swarm optimization (CSO) [12], craziness based PSO (CRPSO) [13], hybrid PSO (HPSO) [14], modified PSO (MPSO) [15], genetic algorithm (GA) [16], hybrid GA (HGA) [17], adaptive real coded GA (ARCGA) [18], bacteria foraging optimization (BFO) [19], modified BFO (MBFO) [20], modified artificial bee colony (ABC) [21], seeker optimization algorithm (SOA) [22], ant colony optimization (ACO) [23], tabu search (TS) [24], biogeography based optimization (BBO) [25], and quasi oppositional BBO (QOBBO) [26] , oppositional BBO (OBBO) [27], harmony search algorithm (HSA) [28] for solving ELD problems. Other optimization algorithms have been proposed to solve the ELD problem, like the opposition based harmony search algorithm (OHSA) which was introduced by Chatterjee et al [29].…”