Modelling and implementation of grid tied pv system using novel reduced component sc2dh mli topology

Abstract

In recent years, the multilevel inverters play an incredible role in handling high power and high voltage applications. Multilevel Inverters (MLI) are a key innovation in the conversion of DC to AC power which plays a substantial role in variable frequency drives, filter networks, non-conventional energy resources, traction systems, UPS, etc., Multilevel converters are all around demonstrated and utilized for medium and higher voltage levels, to control, to improve change effectiveness and to decrease harmonic content and electromagnetic interference. Numerous DC voltage sources synthesize the optimal output of a MLI. With an expanding number of DC voltage sources, the output voltage waveform of inverter approaches an about sinusoidal waveform. These outcomes in low losses in switching while the switches encounter lower voltage stresses. The principle topologies utilized are cascaded H-Bridge type, diode clamped type, flying capacitor type for the generation of less mutilated output. Every topology has an alternate system for delivering the output. Diode clamped type uses series capacitors to clamp output voltage and flying capacitor model uses floating capacitors in order to produce an output voltage whereas cascaded type neither uses clamping diode nor flying capacitor. Owing to their extensibility and feasibility, Cascaded H-Bridge Multilevel Inverter (CHBMLI) is becoming imperative among the various MLIs. Mitigation of harmonics exist in the output voltage waveform of MLI is attained by various PWM techniques. The primary intention of this dissertation is to suggest a novel single phase grid tied multilevel inverter with minimal number of power electronic devices and isolated DC sources with less harmonic distortion. In this work, a novel topology multilevel inverter is designed and named as Switched Capacitor-Clamped Diode H-Bridge MLI (SC2DH MLI) which acts as a generalized model. The suggested topology is compared with few existing topologies in terms of number of switches and component count. A 9-level M