New fundamental modulation technique with SHE using shuffled frog leaping algorithm for multilevel inverters
- PDF / 3,320,396 Bytes
- 17 Pages / 595.276 x 790.866 pts Page_size
- 68 Downloads / 214 Views
ORIGINAL PAPER
New fundamental modulation technique with SHE using shuffled frog leaping algorithm for multilevel inverters Alireza Siadatan1,2 · Mehrnoosh fakhari1 · Bahman Taheri3 · Mahsa Sedaghat4 Received: 11 January 2018 / Accepted: 6 February 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract This paper presents the selective harmonic elimination of cascade H-bridge multilevel inverters using shuffled frog leaping algorithm. This algorithm takes the advantages of the genetic-based memetic algorithm and the social behavior-based PSO algorithm. In addition, this study provides a new fundamental modulation technique with SHE for multilevel inverters which can generate output waveforms with a full range of modulation indices. There are two control objectives formulated as a multi-objective optimization problem. The mentioned algorithm finds the optimal solution set of switching angles. Simulation is performed in MATLAB to confirm the validity of the proposed method. Keywords Multilevel converter · Modulation index · Shuffled frog leaping algorithm · Selective harmonic elimination
1 Introduction Multilevel inverters have received more attentions in the filed of energy distribution and control due to their advantages in high power applications with low harmonics. General structure of the multilevel inverters is to synthesize a desired high voltage from several levels of separated DC voltages that can be batteries, fuel cells, etc. By increasing the number of DC voltage-sources, the output voltage waveform approaches a nearly sinusoidal waveform in which harmonic distortion is reduced while using a fundamental frequency switching scheme. This results in low switching losses, and because of several DC sources, the switches experience lower voltage stresses; however, higher number * Alireza Siadatan [email protected] 1
Department of Electrical Engineering, College of Technical and Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran
2
Energy Systems Group, The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, Faculty of Applied Science and Engineering, University of Toronto, Toronto, ON, Canada
3
Young Researchers and Elite Club, Ardabil Branch, Islamic Azad University, Ardabil, Iran
4
Young Researchers and Elite Club, West Tehran Branch, Islamic Azad University, Tehran, Iran
of levels increases the control complexity and introduces voltage imbalance problems (Kouro et al. 2010). Different types of multilevel converter have been proposed recently: diode-clamped (neutral-clamped), capacitor-clamped (flying capacitor) and cascade multicell with separate DC sources. In addition, by applying appropriate modulation schemes, two important goals including switching speed limitations, low switching frequency and small total harmonic distortion (THD) can be achieved. The modulation methods used in multilevel converters can be classified according to switching frequency (Hashemi et al. 2013). These modulation methods can be divided into two
Data Loading...
