Abstract— This paper presents the simulation of three phase five-level modular multilevel cascade inverter based on double-star chopper-cell (DSCC). The multicarrier PWM techniques such as Phase disposition PWM (PDPWM), Phase opposition disposition PWM (PODPWM), Alternate phase opposition disposition PWM (APODPWM), and Phase shift PWM (PSPWM) is employed and a comparative study is done based on...

This paper presents a novel approach for controlling the harmonics of output voltage of chosen Cascaded Multilevel Inverter (CMLI) employing trapezoidal PWM switching strategies. Carrier Disposition (CD) methods and Phase Shift (PS) method employed are evaluated using spectrum of the output voltage and other performance measures such as crest factor, form factor etc and the use of inverter stat...

Abstract Modular Multilevel Converter (MMC) has found very wide application in renewable energy sources, DC power transmission, high voltage applications and micro grid. However the technical challenge of MMC is to maintain constant current, constant power and constant voltage at the output depending on the requirement. In this paper a control loop is developed for maintaining constant power at...

Multilevel inverters have become more popular over the years in high power electric applications without use of a transformer and with promise of less disturbance and reduced harmonic distortion. This work proposes three phase five level Diode Clamped Multilevel Inverter (DCMLI) to simulate various modulating techniques for induction motor load. These Pulse Width Modulation (PWM) techniques inc...

The use of multilevel inverters is widespread in medium voltage applications due to their inherent voltage sharing among the devices. This work proposes three phase five level Flying Capacitor Multilevel Inverter (FCMLI) using various modulating techniques for induction motor load. These Pulse Width Modulating (PWM) techniques include Carrier Overlapping (CO) strategy, Variable Frequency (VF) s...

The Diode Clamped Multilevel Inverter (DCMLI) is an attractive type multilevel inverter due to its robustness. This paper discusses new modulation strategies for a single phase five level H-bridge type DCMLI with reduced components as compared to conventional DCMLI. The chosen multi level inverter is controlled with multicarrier based Sinusoidal Pulse Width Modulation (SPWM) technique with Vari...

This paper presents different types of bipolar Pulse Width Modulation (PWM) strategies for the chosen Cascaded MultiLevel Inverter (CMLI). The main purpose of MLI is to use power semiconductor devices of lower voltage ratings to realize high voltage levels at inverter output. Due to their ability to obtain refined output voltage waveforms, reduced Total Harmonic Distortion (THD) and reduced EMI...

This research describes the analysis and design of a unique 7-level 9-level multi-level inverter topology with fewer DC power supplies switches, comparison using pulse width modulation (PWM). Comparisons inverters that analyze characteristics optimal nearest level (ONLM) technology are made various PWM approaches such as (NLM) technique, phase disposition (PD), opposition (POD), alternate (APOD...

Multilevel inverters (MLIs) have recently attracted more attention in medium-voltage and high-power applications as they can provide an effective interface with photovoltaic (PV) systems. Conventional MLIs are used to generate higher voltage levels, which improve power quality reduce the requirement for passive filters. However, recent research has focused on designing new MLI topologies using ...

A multilevel inverter have become more popular over the year. multilevel inverter can eliminate the need for the step-up transformer and reduce the harmonics produced by the inverter. Although the multilevel inverter structure was initially introduced as a means of reducing the output waveform harmonic content, it was found that the dc bus voltage could be increased beyond the voltage rating of...