Comparative Analysis of Cascaded Multilevel Inverter Using Level Shift PWM Techniques

K Keerthi, B Jyothi, P Bhavana, S Ravi Teja

Multi-Level Inverter (MLI) is becoming very popular and commonly used in industrial applications where low rating devices are used for high rating applications. Among all Cascaded MLI is used for its well-known topologies and for both single and 3 phase conversions MLI is designed. Comparative analysis of cascaded MLI by using level shift carrier pwm techniques (PD, POD and APOD) is presented. For the proposed inverter, the voltage total harmonic distortion is analyzed by Fast Fourier Transform (FFT) analysis. THD is compared for a cascaded MLI by using Level Shift PWM (LSPWM) techniques such as PD, POD and APOD. Simulation is done in MATLAB and waveforms and THD values are analyzed and compared.

Volume 12 | Issue 2

Pages: 17-24

DOI: 10.5373/JARDCS/V12I2/S20201003