Assessment of Single Phase Cascaded Multilevel Inverter using Equal and Unequal Amplitude Carriers

다국어 초록 (Multilingual Abstract)

This work presents the comparison of various multicarrier based Pulse Width Modulation (PWM) techniques for the chosen single phase CMLI (Cascaded Multi Level Inverter). In this paper, a single phase symmetrical cascaded multilevel inverter is controlled with sinusoidal, THI (Third Harmonic Injection), Trapezoidal, TAR (Trapezoidal Amalgamated Reference) and Stepped Wave reference with Equal Amplitude Carriers (EAC) and UEAC (Un Equal Amplitude Carriers). The proposed EAC and UEAC are applied for various PWM strategies. The PWM methods used for the analysis are PD (Phase Disposition) PWM, POD (Phase Opposition and Disposition) PWM, APOD (Alternative Phase Opposition and Disposition) PWM, CO (Carrier Overlapping) PWM, PS (Phase Shift) PWM and VF (Variable Frequency) PWM with EAC and UEAC. For all the PWM methods and references the UEAC produces less THD and higher fundamental RMS (Root Mean Square) values except for ma =1. For ma =1 the EAC provides less THD (Total Harmonic Distortion) and higher fundamental RMS (Root Mean Square) values for all the PWM methods and references. To validate the developed technique, simulations are carried out through MATLAB/SIMULINK.

목차 (Table of Contents)

• Abstract
• 1. Introduction
• 2. Proposed Topology
• 3. Modulation Strategy
• 3.1. Equal Amplitude Carriers (EAC)
• 3.2. Un Equal Amplitude Carriers (UEAC) (or) Variable Amplitude Carriers (VAC)
• 4. Conclusion
• References