“…The key issue with SHE technique is the solution of nonlinear equations for finding the optimum switching angle to remove certain lower-order harmonics from the output waveform [18] [19], [20]. For solving these non-linear SHE equations, a number of nature-inspired optimization techniques have been used in the literature: the genetic algorithm (GA) [21], [22], particle swarm optimisation (PSO) [14], [22], [23], bee colony optimization [24] and bat [25] algorithm.…”