A New Pulse Width Modulation Technique with Hybrid Carrier Arrangement for Multilevel Inverter Topology
This article introduces a new reduced switch multilevel inverter topology that operates in asymmetric state. The advantage of proposed multilevel inverter is utilizing the lower device count when compared to traditional configuration. This paper depicts a
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Abstract This article introduces a new reduced switch multilevel inverter topology that operates in asymmetric state. The advantage of proposed multilevel inverter is utilizing the lower device count when compared to traditional configuration. This paper depicts a hybrid pulse width modulation which includes three different carriers and unipolar references. The three different carriers are saw-tooth, triangular, inverted unipolar sine which is arranged in phase disposition technique. The effectiveness of proposed hybrid pulse width modulation (HPWM) technique is tested with a new reduced switch topology using MATLAB/Simulink. The different parameters are calculated with various modulation indices. Keywords Cascaded H-bridge topology Hybrid carriers
PWM Multilevel inverter Reduced switch
N. Prabaharan (&) K. Palanisamy School of Electrical Engineering, VIT University, Vellore, Tamil Nadu, India e-mail: [email protected] K. Palanisamy e-mail: [email protected] V. Arun Department of Electrical and Electronics Engineering, Arunai Engineering College, Thiruvannamalai, Tamil Nadu, India e-mail: [email protected] P. Sanjeevikumar Department of Electrical and Electronics Engineering, University of Johannesburg, Auckland Park, Johannesburg, South Africa e-mail: [email protected] © Springer Nature Singapore Pte Ltd. 2018 A. Kalam et al. (eds.), Advances in Electronics, Communication and Computing, Lecture Notes in Electrical Engineering 443, https://doi.org/10.1007/978-981-10-4765-7_4
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1 Introduction Past decades, the multilevel inverter (MLI) concept has been renowned as an imperative and substantial choice of source in high power application [1]. Utilization of multilevel inverters in high power industries has many advantages such as producing good quality of waveform with minimum distortions, reducing passive filter size, lower switching stress and switching losses [2]. A detailed investigation of MLI, modulation techniques, controls and applications were presented in [1]. Diode Clamped, Flying Capacitor, and Cascaded H-Bridge multilevel inverters are the classical types of MLI and which are utilized in high power application [3]. Increasing the component count is the major concern while the topology is extended to another level [4]. The multilevel inverter topology is possible to interface with DVR by replacing the tradition two-level inverter [5]. Nowadays, many topologies are presented with optimum number of switches [2, 6–10]. Asymmetric type of multilevel inverter produces good quality of waveforms with low distortion when compared to symmetric type of multilevel inverters [11]. In [12], a topology is used for grid connected PV application. In [13], single DC source cascade multilevel inverter is employed. Hybrid topologies are very popular for medium voltage drive application and renewable energy based grid connected application [14]. This article presents a new MLI topology which operates at asymmetric condition for increasing the output voltage levels
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