Solution for selective harmonic optimisation in diode‐clamped inverters using radial basis function neural networks

Abstract

In this study, a new heuristic based intelligent algorithm is proposed for the elimination of harmonics in diode-clamped inverters. Numerous methods have been introduced for optimising harmonics in diode-clamped inverter such as Newton-Raphson method. These methods are not sometimes applicable because of difficulty of initialising algorithm parameters and singularity problems in Jacobian-based methods. Radial basis function neural network is used in the proposed method which is one of the most useful members of the neural networks family, because of their capability in the approximation problems. They work on the basis of this fact that, it has been proved that any arbitrary non-linear function can be exactly modelled by a combination of some non-linear basis functions. The proposed algorithm can be applied to solve the selective harmonic elimination problem of any multilevel inverters with any number of levels. The method has the benefit of high rate of convergence and accuracy besides simplicity in implementation. Theoretical results are authorised by experiments and simulations for a seven-level diode-clamped inverter. The obtained results prove efficiency and capability of the proposed method.

Symmetric switched diode multilevel inverter structure with minimised switch count

“…15. Moreover, Table 4 shows the comparison result in terms of number of components of the several seven‐level multilevel inverters [23–27]. The conventional CHB uses 12 switches, but no extra capacitors and diodes are needed [27].…”

Selective Harmonic Elimination in a Wide Modulation Range Using Modified Newton–Raphson and Pattern Generation Methods for a Multilevel Inverter

“…The cascaded H-bridge multilevel inverter can have several H-bridge cells connected in cascades to obtain higher voltage and power at output with fewerrating power switches [27][28][29][30][31][32][33][34][35]. It consists of several separate DC sources to produce a stepped waveform very close to the sinusoidal voltage waveform with lesser THD.…”

Power conversion in renewable energy systems: A review advances in wind and PV system

“…Hence in order to overcome this issue and to get maximum power a parallel connected solar PV system has been introduced. This configuration efficiently handles the maximum power at shading and partial shading conditions . This circuit mainly consists of an array of parallel connected PV cells, boost converter, and inverter and its figure is shown in Figure (a).…”